Heathkit SB-401 Assembly Manual Download Page 115

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Summary of Contents for SB-401

Page 1: ...595 947 01 10 17 69 MODEL 58 401 sse TRANSMITTER PRIce 2 00 Copy Ight 1966 Hedth Company ASSE1VLBLY ...

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Page 3: ...d all subsequent operation of this Transmitter While the 5B 401 is de signed for maximum safety never lose respect for the high voltage present in this unit AIways protect yoursel f a gainst lethal or severe electric shock CAUTION OCR applied now searchable ...

Page 4: ...nt Carrier Null Adjustment Neutralizing II II Final Bias 21 Megahertz Trap Heterodyne Oscillator Carrier Generator CONTENTS 96 97 97 90 90 90 90 91 92 93 94 94 95 95 96 87 75 78 79 81 82 85 73 35 39 54 55 63 64 33 16 21 24 13 8 10 5 6 4 3 Page 2 Microphone COllnection LMO Adjllstment Final Transmitter Adjustment Alignment With SBA401 1 Crystal Accessory Kit Installed Crystal In stallation Equipmen...

Page 5: ...l The knob to dial ratio is approximately 4 1 All aluminum metal parts provide light weight and sturdy construction Assembly time saving features include circuit boards wiring cable assemblies and a preas sembled LMO tuning unit The transformer operated silicon diode power supply is a long life low heat power source Complete Transceive capabilities are available when the Transmitter is used with t...

Page 6: ...s You will be directed to open each ofthese pack ages as they are needed Each ofthe five assem bly sections of the Manualcontains its ownParts List and Step By Step instructions At the be ginning of each Parts List you will be told which numbered package to open You will also be di rected to remove the parts from pack 5 that are required to complete that assembly section The Transmitter packaging ...

Page 7: ...34 129 220 Kn red red yellow 85 154 1 1 1 2 1 1 1 1 42 1 7 1 9 1 16 1 24 RESISTORS 1 2 Watt 3 3 pf 5 pf 001 J lfd 005 Mfd 01 J lfd 02 J Lfd 1 1 1 1 4 1 Disc 3 21 33 21 78 21 14 21 27 21 16 21 31 DESCRIPTION PARTS Per Kit PART No DESCRIPTION PARTS Per Kit PART No Unpack pack 1 and check each part against the following Parts List The numbers in parenthe ses are keyed to the numbers in the Parts Pict...

Page 8: ...d red yellow 22 pf mica Locate the mixer bandpass cou pler circuit board 85 154 1 and position it lettered side up as shown 001 lfd disc START 680 n blue gray brown CONTINUE Refer to Pictorial 1 1 and complete the circuit board steps Use 1 2 watt resistors unless directed other wise in a step All resistors will be called out by only the resistance value in n KQ or megohms and color code Capacitors...

Page 9: ..._ t t PRESS THE SOCKET DOWN UNTIL IT SEATS IN PLACE ALIGN ALL PINS TO THEIR RESPECTIVE HOLES Install 7 pin tube sockets at V5 and V4 Solder all 7 pins and the center pin of each socket LETTERED SI D E SOLDER Solder the center pin to the ground clip on the two 7 pin tube sockets before the sockets are mounted NOTE When soldering the tube sockets in the following steps the first application of solde...

Page 10: ...t 1500 n brown green red 220 KS1 red red yellow 1 Watt 1 1 22 1 1 1 30 1 1 1 35 5 1 36 3 1 25 7 1 50 1 1 26 2 1 29 3 1 33 1 10 n brown black black 68 n blue gray black 220 n red red brown 470 n yellow violet brown 680 n blue gray brown 1000 n brown black red 1500 n brown green red 2000 n red black red 2700 n red violet red 15 Kn brown green orange 33 KS1 orange orange orange 47 KS1 yellow violet o...

Page 11: ... f ooooo PARTS PICTORIAL Page 9 ...

Page 12: ...t orange 47 yellow violet yellow 470 Kn 220 Kn red red yellow 01 Mfd disc COLOR BAND COLOR DOT COLOR END 1 5 megohm brown green green 01 J Lfddisc 220 Kn red red yellow Silicon diode NOTE Place sili con diodes with the cathode end as directed The cathode end may be identified by 01 J Lfd disc 47 yellow violet orange Kn 10 J Lfd electrolytic 680 n blue gray brown 1 megohm brown black green CONTINUE...

Page 13: ...llow violet orange cut and Solder all connections off the excess leads J I C I I I 001 Jlfd disc Kn yellow violet orange 47 005 Mfd disc 33 Kn orange orange orange 01 J lfd disc 10 J lfdelectrolytic 2000 red black red 68 n blue gray black 005 Mfddisc 68 Kn blue gray orange 01 J lfd disc 68 n blue gray black 1000 n brown black red 1500 red watt 1 brown green 1 megohm brown black green 01 J lfddisc ...

Page 14: ... numbered 500 KS l miniature control 10 149 10 Kn 148 control 10 miniature Similarly iature control mm install 200 n 10 147 WHEN MOUNTING CONTROLS ON THE CIRCUIT BOARD SOLDER COVER TO FOIL AT THE REAR OF THE CONTROL SOLDER SOLDER 5000 n miniature control 10 150 on foil side LET T ERE D SIDE 7 0 f It eO o a 8 0 I 4i I _ _ r I l f I I I I NOTE All miniature controls mount on foil side of board solde...

Page 15: ...scillator 80 meter heterodyne oscillator 15 20 40 80 meter final tank 1 40 551 5 2 2 2 1 COILS 9 40 529 40 528 40 602 40 601 40 552 22 pf 62 pf 68 pf 100 pf 270 pf 1 1 1 5 2 Mica 20 99 20 109 20 76 20 102 20 114 DESCRIPTION PARTS Per Kit PART No 200 n linear tab mount 600 n linear 10 Kn linear tab mount CONTROLS 7 10 61 1 8 10 34 1 10 57 1 DESCRIPTION PARTS Per Kit PART No Unpack pack 3 and check ...

Page 16: ...der lug 6 fiber shoulder washer 1 2 2 18 73 3 19 73 43 73 46 INSULATORS GROMMETS 6 Hardware 17 71 4 2 Ceramic insulator This part 32 250 27 2 may come disassembled in a 33 250 26 1 plastic bag 34 250 89 4 1 2 rubber grommet 35 250 56 63 3 8 t plastic grommet 36 251 1 6 5 16 plastic grommet 37 252 3 68 38 253 25 4 CONNECTORS SOCKETS JACKS 39 254 1 83 20 432 4 1 Male line cord connector 40 259 1 5 4...

Page 17: ...344 21 344 50 344 51 344 52 344 53 344 54 344 55 344 56 344 57 344 59 346 1 4700 n 1 2 watt resistor yellow violet red 425 J lH RF choke 4 5 H filter choke Dial pulley assembly Angle bracket Fuseholder Banana jack insert Phenolic shaft coupling Capacitor mounting wafer metal Capacitor mounting wafer insulated 8 allen wrench Nut starter Sandpaper GENERAL 1 16 3 2 1 Large tuning capacitor mounting b...

Page 18: ... the steps will callout only the type and size of the hard ware to be used For example the phrase Use 6 32 x 1 4 hardware means to use a 6 32 x 1 4 screw 6 lockwasher and a 6 32 nut Refer to the mounting details for proper install ation of hardware Detail 3 1 A RULER OR STRAIGHT EDGE SIDE APRON FRONT FLANGE BE NO AS REQUIRED SIDE APRON Refer to Detail 3 1A and check the front edges of the chassis ...

Page 19: ... J i 1 l f t l l l i i l l f l l i r 0 r 0 0 r r 1 70 63 2 46 F e o l C let o o t 12 13 OpO 0 0 Db r r r r r 0 16 It o PICTORIAL 3 PARTS I to ...

Page 20: ...D LU t OUT PICTORIAL 3 1 o o 0 0 0 j0 o o o o o 0 o 0 o o o r 0 00 o I 00 o o o o o o o FILTER CHOKE o o o o L L_ 0 _ j D r7S l0 g o o o o o o o o o 0 CD o o o o o o o o o o 00 o 0 o 0 0 J 0 m 0 D o 0 OJ ID OJ OJ ID OJ ...

Page 21: ...turn Mount an insulated capacitor mounting wafer on top of the chassis at G Use 6 32 x 1 4 hardware Refer to Detail 3 lF and mount a metal capacitor mounting wafer on top of the chassis at F with a 1 lug vertical terminal strip on the bottom of the chassis at E Use 6 32 x 3 8 hardware for the double mount ing and 6 32 x 1 4 hardware for the other mounting The mounting wafer must be on top of the c...

Page 22: ... LUG II 3 l OC K WAS HER t e _ l B O T T OM r r a O F C H A S S IS t I t e I t I 0 a f W 1 0 0 I 3 48 NUT Detail 3 1J 6 LOCKWASHER KEYWAY Mount an octal socket at V11 with 6 32 x 1 4 hardware Position the keyway as shown Refer to Detail 3 1H and mount a 4 5 H filter choke 46 43 Position the choke as shown and secure it with 6 32 x 1 4 hardware Twist the two choke leads to gether and position them ...

Page 23: ...wn Be careful not to overtighten the screw as the crystal socket will crack easily 3 48x3 8 SCREW CRYSTAL SOCKET BOTTOM OF CHASSIS SMALL 6 SOLDER LUG 3 L OC K W A SHE R 3 48 NUT Detail 3 1 N FUSEHOLDER RUBBER WASHER BOTTOM OF C H A S S I S _ I O I I t I I 1 1 I I I I I o I e I I I t I 0 I I 00 I I FUSEHOLDER L OC KWA SHE R FUSEHOLDER NUT Refer to Detail 3 lN and mount the fuse holder at X using th...

Page 24: ...d 6 lockwashers Detail 3 1 T 5 16 x 15 32 LONG SPACER In a similar manner mount a small 6 solder lug on the bottom of the chassis only at T Use 4 40 x 5 16 hardware Bend the solder lug as shown Detail 3 15 I f14 40x5 16 SCREW 4 40 NUT 8 Refer to Detail 3 1S and mount small 6 solder lugs on the top and bottom of the chassis atll Use 4 40 x 5 16 hardware Position and bend the solder lugs as shown Re...

Page 25: ... supplied with the capacitor Do not overtighten as the capacitor may be damaged LENGTH 3 1 2 6 2 1 2 2 1 1 2 2 1 2 3 1 2 WIRE COLOR Yellow Red Brown Black Red Green Blue Detail 3 1 W The following wires may be preparedahead of time if you wish The wires are listed in the order that they will be used FEEDTHROUGH CAPACITOR COIL MOUNTING CHASSIS TOP Refer to Pictorial 3 2 and Detail 3 2A fold out fro...

Page 26: ...are wire through lug 2 of coil CD 8 2 to lug 2 of coil CE S 2 The other end of the wire will be connected later Connect a 68 pf mica capacitor between lugs 1 NS and 2 NS of a 40 551 coil Install the coil at CE with the wire through hole 6 Connect one end of a 3 1 2 blue wire to lug 1 of the coil S 2 Refer to Details 3 2A and 3 2C and install the coil at CA with the yellow wire through hole 1 and t...

Page 27: ... the coil S 3 Connect the end of the bare wire coming from lug 2 of coil CD to the bare wire connected between lug 2 of coil CA and lug 2 of coil CF 8 1 Connect a 270 pf mica capacitor between lugs 1 NS and 2 N8 of the coil Connect a 4700 n yellow violet red re sistor between lugs 1 NS and 2 NS of a 40 601 coil Pass the free end of the bare wire coming from lug 2 of coil CA through lug 2 of coil C...

Page 28: ...x 1 4f screw and a 6 lockwasher Connect one end of a 5 1 2 black wire to lug 2 of coil CS 8 4 PARTS MOUNTING CHASSIS TOP Refer to Pictorial 3 3 fold out from Page 31 for the following steps Connect a 1 1 2 bare wire from lug 2 of coil CR 8 2 through lug 2 of coil CS NS to lug 2 of coil CT 8 3 Carefully inspect the coil wiring to be sure that the coil lugs are not touching each other or other wires...

Page 29: ... 3 3C and install the car rier generator circuit board 85 76 3 with a pilot lamp socket at TR Use 4 40 x 5 16 hardware only in the eight holes indi cated by the arrows shown in Pictorial 3 The remaining hardware will be installed later NOTE Any solder around the edge of either circuit board which will keep the board from fitting flush against the chassis must be re moved before the circuit board i...

Page 30: ...stall the variable capacitor at T A with a 6 solder lug on the bottom of the chassis at Z as shown in Detail 3 3E Use 6 32 x 1 4 screws and 6 Iockwasher s Detail 3 3F REAR OF CHASSIS STANDOFF SC RE W STANDOFF I FLAT WASHER I 2 3 4 to lug 1 8 1 2 to lug 2 8 1 5 to lug 3 8 1 4 to lug 4 S l Connect one end of the following lengths of red stranded wire heavy insulation to this 4 section variable capac...

Page 31: ...rough grommet RD Do not overtighten the mounting screws BEND LUG 4 1 2 to lug 1 S 1 3 1 2 to lug 2 S 1 3 1 4 to lug 3 S 1 3 to lug 4 S 1 2 3 4 to lug 5 S 1 DIAL PULLEY ASSEMBLY WITH 1 4 HOLE 8 32x1 4 SET CREW Refer to Detail 3 3G for the following steps NOTE The 3 section variable capacitor 26 92 that is installed in the next three steps would be very difficult to replace later if it is found to b...

Page 32: ...6 32 x washers Mount this variable capacitor at TD on the Detail 3 3J 6 LOCKWASHER I 6 32x3 8tf f1 SCREW Install the phenolic shaft coupling as far as it will go on the shaft of a 1 section variable capacitor 26 77 Use an 8 32 x 1 8 setscrew Place a split bushing in the end of a 1 4 phenolic shaft coupling and secure it with an 8 32 x 1 4 setscrew Position the split bushing flush with the end of t...

Page 33: ...pray from the bottom edge of the final amplifier enclosure to insure good contact with the chassis Locate and disassemble the RF final ampli fier cage by removing the four sheet metal screws Retain the screws for use later Install a 1 section variable capacitor 26 24 on the capacitor mounting bracket using a nylon shoulder washer nylon flat washer and the nut supplied with the capacitor Po sition ...

Page 34: ...and 6 32 nuts Position the lugs of the LMO in the center of the slotted holes Tighten the nuts just enough to hold the LMO in place on the chassis JS REAR OF CHASSIS Refer to Detail 3 3M and remove the screw marked TX from the side of the LMO Set this screw aside It will be used later Do not loosen the sealed screws a FINAL AMPLIFIER ENCLOSURE o 6 lOCKWASHER o Refer to Detail 3 3L and mOW1t the fi...

Page 35: ...61 control tab mount 200 Mount a Install a large 6 solder 6 32 x 1 4 hardware Mount the 3 lug terminal strip at TS 6 32 x 1 4 hardware steps following the 3 3N for Detail to Refer Detail 3 3M OR EDGE RULER STRAIGHT CtRCULAR OIA L oo to oo o 0 0 LMO oo oo oo oo oo oo OO o oo oo o o o oo oo oo oo 0 oo 0 0 1 to 0 0 t 0 oo 0 oo 0 I lll oo o 0 o oo _ ___ 9 0 _ _ 3 _ LMO z t 1 f 6 Page 31 ...

Page 36: ...t 1 01 o o T1 CARRIE NULL o 84 22 o B o E 00 o o_ o r o 00 00 o i r o o T2 ANTI VOX AO_ T VOl D U I T VOX _ _ T f GAlN I I I I O O a I t N OA 1 1 o o o Yilt o INSTALL SCREWS ONLY IN THESE HOLES OF THE CIRCUIT BOARD 0 G lJ o ...

Page 37: ...DETAIL 3 2A 2 0 o 0 00 2 04 014 0 Q 0 2 0 2 2 D 00 06 07 2J 1S 14 0 0 PICTORIAL 3 2 005 ...

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Page 39: ...HEATHKIT Page 32 ...

Page 40: ...et brown 750 n violet green brown 1000 n brown black red 2000 n red black red 3300 n orange orange red 3900 n orange white red 4700 n yellow violet red 6800 n blue gray red 8200 n gray red red 10 Kn brown black orange 15 Kn brown green orange 47 Kn yellow violet orange 100 Kn brown black yellow 150 Kn brown green yellow 220 Kn red red yellow 680 Kn blue gray yellow 1 megohm brown black green 4 7 m...

Page 41: ... 69 40 1 63 343 1 63 342 SWITCHES RELAYS 63 341 1 Band switch 5 section 8 position Mode switch 4 section 4 position Function switch 5 position SPDT relay 5 pole DT relay 27 258 5 1 28 258 6 2 METAL SHIELDS 2 section 205 87 1 29 206 233 1 30 206 234 1 31 206 235 1 32 206 236 1 10 meter final tank coil 3 Hardware 10 meter RF amplifier coil 250 172 3 15 meter RF amplifier coil 250 49 4 2 lH choke 24 ...

Page 42: ...dering these ter minals to the foil later be sure that solder flows into and around the term inal pin I I fold out from Page 36 Refer to Pictorial 4 1 for the following steps STOP RIDGE PRELIMINARY WIRING CHASSIS TOP STEP BY STEP ASSEMBLY Male terminal pin not used in assembly Female terminal pin Crystal socket Coaxial jack Phone plug Switch shaft coupling Metal capacitor mounting wafer 6146 tube ...

Page 43: ...o o PICTORIAL 4 1 BLU o I II 16 CONDUCTOR CABLE I It I I 4 CONDUCTOR CABLE I I _ r I 0 I IN SET Fl I o M I X E R BAN D PAS S CIRCUIT BOARD 7 5 I YEL 40 54 9 tL WHT BRN s t J j o o ...

Page 44: ...y The shield should be gripped with a pair of long nose pliers between the connection and the cable when soldering This reduces the possibility of short circuits in these cables A rubber band may be placed around the handles of the pliers to hold them in place while soldering Connect the wires from B0 3 to the carrier generator circuit board as follows Black white cable inner lead to lug 2 of cont...

Page 45: ...amp socket TR NS Position the wire down against the chassis as shown _l 2 Detail 4 1 E Refer to Detail 4 1E for the following steps RF PARASITIC CHOKE ANODE CL1P At the end of the prepared coaxial cable with the shield connect the inner wire to E S 1 and the shield to D 8 1 of the carrier generator circuit board Pass the other end of the cable through grommet HA for connection later Refer to Detai...

Page 46: ...will be connected later Detail 4 1G APPLY HEAT TO THE TIP OF THE PIN ONLY LONG ENOUGH FOR THE SOLDER TO BE DRAWN UP INTO THE PIN BY CAPILLARY ACTION CUT OFF EXCESS WIRE FROM THE TIP OF THE PIN SOLDER THE SHIELD TO THE PLUG 1 4 OF SLEEVING NOTE When resistors are installed in a step be sure to use 1 2 watt resistors unless the step directs otherwise PLACE 1 4 OF SLEEVING OVER THE INNER WIRE OF ONE ...

Page 47: ...t them from being broken Solder the bottom of the thirteen terminal pins extending through the carrier generator circuit board and solder the three terminal pins extending through the mixer bandpass circuit board MIXER BANDPASS CtRCU1T BOARD Remove the tube shield and tube from the LMO and set them aside Refer to Pictorial 4 2 fold out from Page 45 for the following steps Refer to Details 4 2A and...

Page 48: ... on the carrier generator circuit board Do not use terminal pins Solder both connections Position this wire approxi mately 1 4 above the circuit board as shown Solder lug 2 of capacitor F to the capacitor mounting wafer S 1 Connect a 100 Kn brown black yellow 2 watt resistor from lug 1 NS to lug 3 NS of capacitor F Position this resistor down against the mounting wafer Connect the coaxial cables f...

Page 49: ...terminal strip D NS to lug S of tube socket VB N8 Connect a 150 pf mica capacitor from lug 1 of terminal strip D 8 2 to lug 7 of tube socket V8 8 2 Connect a 47 KO yellow violet orange resistor from lug 2 of terminal strip D N8 to lug 7 of tube socket VB N8 Connect a 3900 n orange white red resis tor from solder lug B NS to lug 2 of tube socket VB NS Bend the remaining lugs of tube socket VB out s...

Page 50: ... 1 4 and connect this lead to lug 1 of tube socket V9 NS The other lead will be connected later Connect a 005 ufd 500 V disc capacitor between lugs 3 S 2 and 4 NS of terminal strip R Bend the remaining lugs of tube socket V9 outward as shown Bend lugs 4 and 7 of tube socket V9 against the center post of the socket N8 Connect a 3300 n orange orange red 1 watt resistor from lug 8 of tube socket V9 8...

Page 51: ...her end of this wire will be connected later Connect a 10 n brown black black resistor between lugs 1 8 2 and 9 8 3 of tube sock et VII Connect a 01 lfd disc capacitor between lugs 2 NS and 3 N8 of terminal strip N Pass oneleadofa 005 lfd500V disc capac itor through lug 9 N8 to lug 2 8 1 of tube socket V11 Connect the other lead to lug 1 of tube socket V11 N8 Connect a 1 length of large bare wire ...

Page 52: ... of coil CN 8 4 to lug 2 of coil CP NS Use sleeving on this lead Connect the other lead of this resistor to lug 1 of coil CM 8 3 NOTE The wires that are connected to coils CP CN CM CX and CU in the following steps are shown on the Detail only to provide more clarity on the Pictorial The coils will be mount ed beneath the chassis Connect a 005 lfd 500 V disc capacitor from lug 1 of coil CM NS to so...

Page 53: ... bottom of the terminal pin at C as shown in Detail 4 2F Refer to DetaiI4 2H and prepare a 3 length of coaxial cable as shown Connect the red wire from hole 19 to lug 2 of coil ex S 4 At the end of the prepared cable with the shield lead connect the inner lead to E 8 1 and the shield to D 8 1 of the mixer bandpass circuit board The other end of the cable will be connected later Pass one lead of a ...

Page 54: ...o o o o PICTORIAL4 2 o LK WHT o n o c CRYSTAL FILTER o LK RED o 100 K 2W I I FILTER CHOKE 1 IlH RF ARASITIC CHOKE o 01 ...

Page 55: ...IAL 4 3 o FUTURE LOCATION OF CARRIER GENERATOR SHIELD SH I E L 0 5 K o RED BL o 4 Jl PLASTIC TAPE WH G N FUTURE LOCATION OF SWITCH SUPPORT SHIELD Q e o o o 0 RED 3 2 SH 32 o TERMINAL BOARD 1 RF PARASITIC COKE INSET ...

Page 56: ...NOTE Pass the following two wires under the components connected to terminal strip R Red to lug 3 of terminal strip P NS White orange to lug 1 of terminal strip R S 4 Short green to lug 1of terminal strip L 8 3 Short white green to lug 2 of terminal strip L S 4 Locate the large cable assembly and position it on the chassis as shown NOTE Pictorial 4 3 shows only the wires of the cable assem bly tha...

Page 57: ...re from BO 9to LEVEL on the carrier generator circuit board 8 1 The remaining wires will be connected later Refer to Detail 4 3A and prepare a 30 lug terminal board by cutting between the lugs as shown Be sure you have the correct point before cutting 6 32 1 2 STUD 6 32NUT 6 L OC K WAS HER I __ I c 0 0 1 0 I 00 O 4 O 4 t 1 r t 4 7 Q t t _ o o o Refer to Detail 4 3B for the following steps Connect ...

Page 58: ...B0 8 to the carrier generator circuit board as follows later Connect the wires from B0 7 to terminal board 2 as follows use the hole in the bottom of each lug Pass the long violet and long white violet wires from B0 8 through HAfor connection Short white violet to lug 20 rs n Refer to Detail 4 3D and prepare another 30 lug terminal board Be sure you have the proper point before cutting Mount the t...

Page 59: ...board 2 as follows use the bottom hole of each lug White brown to lug 5 of tube socketV8 N8 Green and white green to lug 19 8 2 Orange to lug 14 N8 Gray to lug 13 8 1 White violet to lug 3 of terminal strip D 8 4 White to lug 24 8 1 Connect the wires from B0 4 as follows Connect the wires at the end of the cable assem bly to terminal board 1 as follows use the hole at the bottom of each lug The re...

Page 60: ...and 4 are soldered to the center post Connect one end of a 3 white wire to lug 3 of tube socket V8 N8 The other end will be connected later 150 KO brown green yellow resistor be tween lugs 8 8 1 and 23 8 1 Refer to Pictorial 4 3 for the following steps 02 J Lfd disc capacitor between lugs 1 8 3 and 4 8 2 02 lfd disc capacitor between lugs 1 N8 and 2 8 1 68 KO blue gray orange 1 watt resistor betwe...

Page 61: ...ard 1 8 1 Use the hole in the bottom of the lug on the terminal board Be sure the body of the resistor does not extend over the edge of the chassis any more than necessary Connect the end of the red wire extending from hole 14 to lug 14 of terminal board 1 S 2 Use the hole in the bottom of the lug Position the wire under the terminal board Detail 4 3F 7 7 U rFUn H U LU UHH n j j L f j nuu j jj i U...

Page 62: ...con diode Detail 4 3H COLOR BAND COLOR DOT J I COLOR END Install the following components on terminal board 1 NOTE WHEN INSTALLING SILICON Of ODES THE CATHODE END MUST BE PLACED AS DIRECTED THE CATHODE END IS MARKED WITH EITHER A COLOR END COLOR DOT OR COLOR BAND Place one lead of a 02 lfd disc capacitor through lug 31 S 2 to lug 12 S 1 Use 1 2 of sleeving between lugs 31 and 12 Use the hole in th...

Page 63: ...O S 2 to lug 3 of tube socket VII 8 2 Shape the wire as shown in the inset drawing 22 pf mica capacitor between lugs 6 S 2 and 21 NS 30 J lH RF choke 45 27 between lugs 2 S 1 and 17 8 1 Connect a 3 large bare wire from lug 5 of tube socket VI0 8 2 to lug 5 of tube socket VII 8 1 8hape the wire as shown in the inset drawing 47 Kg yellow violet orange resistor be tween lugs 3 NS and 18 8 2 2 J lfd r...

Page 64: ... manner mount crystal sockets and crystal clips at YIOand Y11 using 3 48 x 3 8 hardware Do not use solder lugs Refer to Detail 1 4A and mount a crystal socket and crystal clip witha small 6 sold er lug at Y9 Use 3 48 x 3 8 hardware Position the solder lug against the crystal socket lug as shown Refer to Pictorial 4 4 for the following steps PARTS MOUNTING ON CARRIER GENERATOR SHIELD PICTORIAL 4 4 ...

Page 65: ...40 x 1 2 hardware Be careful not to pinch any wires between the shield and the chassis Refer to Detail 4 5A for the following steps Cut one side of a 1 2ft rubber grommet and position it over the cable assemblies as shown Mount the relay at AA Use one half of a 5 16 rubber grommet see the inset draw ing a 6 lockwasher and a 6 32 nut Mount a 4 lug terminal strip at AB Use 6 32 x 1 4 hardware Be sur...

Page 66: ...Connect a 02 ufd disc capacitor between lugs 2 N8 and 3 S 3 ofterminal strip AB Refer to Detail 4 5B and mount a 100 J Lfd 40 J lfd electrolytic capacitor 25 59 at AE Position the capacitor lugs as shown Twist the mounting tabs 1 8 turn Connect a 470 Q yellow violet brown re sistor from lug 3 of terminal strip AB NS to LSB on the carrier generator circuit board 8 1 Pass one lead of a 7 5 pf mica c...

Page 67: ... yellow wire to MBI R1l 8 1 Place a 3 3 4 bare wire through MS1 F4 B 2 MS2 R4 B 2 to MS3 F6 S 1 Locate the 4 section 4 position switch 63 342 and position it as shown in Detail 4 5C NOTE The following steps concern prewiring the Mode switch To make lug identification easier a system of letters and numbers will be used For example MSI F2 means Mode switch MS 1 first wafer F front of wafer 2 lug 2 W...

Page 68: ...S2 FIO 8 1 Connect the wires from B0 6 to Mode switch FK as follows Detail 4 50 Connect the white yellow wire from B0 7 of the cable assembly to MS3 F12 S 1 BOTTOM OF CHASSIS Refer to Detail 4 5E for the following steps CONTROL SOLDER LUG NOTE Do not shorten any of the wires in the next four steps The switch must be rotated 90 degrees counterclockwise when viewed from rear after these steps are co...

Page 69: ...from MS4 F9 to lug 1 of crystal socket Y9 S 1 Connect the wires from B0 6 to Mode switch FK as follows Connect the white wire from MS4 Fl2 to 8W on the carrier generator circuit board S 1 White gray to MS2 RB 8 1 Gray MS3 F7 8 1 Yellow to M8l F3 S 1 Either white to M8l F8 8 1 Other white to M81 F7 S 1 Connect the wires from B0 5 of the cable assembly to Mode switch FK as follows Connect the wires ...

Page 70: ...PICTORIAL 4 5 _ _ _ _ 10 GRAY Fe RAY WHT WHT VIOL WHT GRN WHT BRN WHT BLK 02 02 I ...

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Page 72: ...g them to the relay The wires should have only 1 4 of insulation removed from the ends if the stripped part of the wire is longer cut it to 1 4 After the connection is soldered and cooled push the sleeving over the relay lug as shown in Detail 4 6A Use only enough solder to insure a good connection Refer to the inset drawing on Pictorial 4 6 for relay lug numbers and wire colors White brown from B...

Page 73: ... the cathode lead of a silicon diode Red to lug 5 NS Yellow to lug 4 NS Connect a 2 1 2 red wire between lugs 2 NS and 5 S 2 of terminal str ip AC Connect a 100 Kn brown black yellow 2 watt resistor between lugs 1 NS and 4 S 1 of capacitor AE Three orange to lug 1 NS Connect the wires from BO 10 to terminal strip AC as follows Connect the black filter choke lead to lug 1 of capacitor AE NS Positio...

Page 74: ...tranded wire from lug 2 of AC receptacle BD NS to lug 5 of terminal strip J S 3 Mount a wide spaced 5 lugterminal strip at AD on the carrier shield using 6 32 x 1 4 hardware Refer to Pictorial 4 6 for proper positioning of the terminal strip Install the terminal pin in accessory socket BG at 9 Connect the other end of this wire to lug 1 of AC receptacle BD N8 Refer to Detail 4 60 and mount the ac ...

Page 75: ... Brown to lug 4 of terminal strip AD 8 2 Blue to lug 3 of terminal strip AD 8 2 Green yellow to lug 2 of terminal strip J 8 2 Red yellow to lug 1 of capacitor F 8 4 Red to lug 4 of terminal strip H 8 3 Yellow to lug 1 of terminal strip J 8 2 Twist the red and red yellow leads together and position them under terminal strips J and H as shown Yellow brown to lug 1 of terminal strip K 8 2 Connect the...

Page 76: ...itch lockwashers and nuts re moved previously Keep the switch in proper alignment at all times Black 18 BS4 F5 8 1 Red stranded 23 BS4 R2 8 1 Connect a 1 1 4 bare wire from lug 2 of crystal socket Y2 8 1 to BSl F6 8 1 17 16 21 13 8 BS2 F5 8 1 BS2 F6 S 1 BS2 F1 5 1 BS3 F11 S 1 BS3 R4 rs r BS4 F9 8 1 BS4 F7 8 1 3 7 Red Black Violet Black Red stranded Yellow Brown CAUTION When handling the Band switc...

Page 77: ...Connect the red wire from lug 2 of coil CX From lug 3 of coil TE to BS5 F6 8 1 to BS4 R19 NS From lug 2 of coil TE to BS5 F4 8 1 Connect a 2 red wire between lugs BS4 F3 Connect the short red wire from lug 2 of variable capacitor TC to BS5 F2 S 1 S I and BS4 R19 NS Detail 4 7 A 6x3 8 SHEET METAL SCREW SWITCH SHAFT SWITCH L OC KWASHE R PRETHREAO WITH tt6x3 S SHEET METAL SCREW CONTROL NUT SW ITC H S...

Page 78: ...PICTORIAL 4 7 1 o o ITERMINAL BOARD 11 10 3 0 o o 9 4 0 o 21 INSET 6 7 RE 71 RED B K I I L __ o 0 o 0 0 140 0 0 0 a 0 11 12 1 1 Detail 4 78 15 o o o ...

Page 79: ...PICTORIAL 4 8 GRN W T o o GR ITERMINAl BOARD 11 ED BII GRAY BlK I WHT VIOl RED I K 2W 1 2 o G aD I I I 16 SETSCREW VTi 1RED PllNG w BANDED END 7 o 0 o o 0 Z c 11 o o e L J Detail 4 8F ...

Page 80: ...and start 6 32 x 3 16 setscrews in the threaded holes of the switch coupling Refer to Detail 4 BB and install the driver shield on the chassis using 6 lockwashers and 6 32 nuts Position the bottom tube shield in the center post of tube socket V9 S 6 Be sure lugs 4 and 7 of tube socket V9 and the bottom tube shield are soldered to the center post Be sure no 9th rll gsare ouc ing 1 eshi d or_ceI er ...

Page 81: ...ounting feet of the Band switch Loosen the control nut and the mounting nuts that secure the Band switch to the chassis Install the switch support on the chassis being careful not to pinch any wires between the support and the chassis Use 4 40 x 1 2 hardware the small spring clip and 6 x 3 8 sheet metal screws Be sure the rubber grommet fits into the cutout in the support 4 40xl 2 SCREW RUBBER I G...

Page 82: ...0 NS Connect the following wires to the Band switch Connect the blue wire coming from lug 1of coil CP to BS3 F16 8 1 Refer to Pictorial 4 8 and Detail 4 8F told out from Page 66 for the following steps Refer to Detail 4 8E and install the coaxial connector at BU with a small 6 solder lug at BW Use 4 40 x 5 16 hardware Posi tion and bend the solder lug as shown Refer to Pictorial 4 8 for the follow...

Page 83: ...et HE to lug 3 of terminal strip AF N8 Connect a 005 lfd disc capacitor between lugs 2 NS and 3 N8 of terminal strip AF Connect the white orange wire from BO 12 of the cable assembly to lug 2 of feed through capacitor AH NS Connect a 3 3 4 red stranded wire from lug 3 of relay AG 8 1 through the hole in the final shield to lug 2 of phono socket BX S I Connect the orange wire from BO 12 of the cabl...

Page 84: ...ail 4 8J BOTTOM OF CHASSIS CONTROL SOLDER LUG u Y Connect the violet wire coming from B0 3 to FS2 R3 8 2 Connect the cathode lead of a silicon diode to FS2 R3 NS and the other lead to FS2 R11 NS Connect a 1 bare wire from FS1 R2 NS through FS1 R3 S 2 to FSI R4 8 1 Bend the lugs as shown Refer to Detail 4 8H and the following steps for the preliminary wiring of the Function switch 63 343 Detail 4 8...

Page 85: ...ction switch 8 1 White yellow Gray Black Connect a 3 1 2 orange wire from lug 14 of terminal board 1 8 1 to FS2 FI2 8 1 Connect a 1 bare wire from the Function switch control solder lug 8 1 to FSI R6 8 1 FSI R2 S 2 FSI R12 S I FSI R11 S I FSI R9 S 1 FSI R7 8 1 FS2 Fl 8 1 F82 R8 N8 FS2 R7 8 1 Red White violet CONNECT TO WIRE COLOR White White green Green Connect the red wire coming from lug 5 of tu...

Page 86: ...HEATHK IT Page 72 ...

Page 87: ...etal screw 6 32 x 3 8 oval phillips head screw 6 32 x 3 8 flat head screw 6 32 x 1 4 screw 6 32 x 3 16 setscrew 6 32 nut 6 32 thumbnut 6 lockwasher 6 flat washer 6 Hardware 250 40 2 250 29 4 250 8 8 4 250 218 2 5 250 32 4 250 56 6 250 230 2 252 3 12 6 252 23 2 254 1 12 253 25 4 HARDWARE 2 3 8 for 9 pin tube socket 1 3 4f for 9 pin tube socket 1 3 4 for 7 pin tube socket Pilot lamp shield 2 1 3 3 S...

Page 88: ...AL 1 3 1 Per Kit No DESCRIPTION PART PARTS Page 74 100 n resistor brown black brown 680 n resistor blue gray brown 01 disc capacitor Output transformer 5 position Meter switch 2 position switch with 10 Kn l megohm control Line cord Angle bracket Cabinet Front panel Coil enclosure Foot spacer Dial cord spring Rubber feet Dial cord Nameplate SB 401 3395 4 kilohertz crystal 100 450 Packaged Dial Driv...

Page 89: ...is and dial pointer drive arm slots Tighten the hardware finger tight Turn the shaft of the LMO fully counter clockwise against the stop Start an 8 32 x 1 4 setscrew in the threaded hole in the hub of the circular dial 100 449 NYL ON SPIRAL FOLL OWER Detail5 1A o tAL POINTER DRIVE ARM 100 477 o _ _ __ PICTORIA L 5 1 3 4Sxt S SCREW SCRE W Locate the dial drive assembly package 100 450 These parts w...

Page 90: ... _ I 1 I ____ II I PICTORIAL 5 PARTS ...

Page 91: ... LMO SHAFT 4 40xl S SETSCREW CONNECTOR LOCKWASHER DIAL DRIVE PULLEY _ DIAL DRIVE R I NO NNECTOR NUT CIRCULAR D 14 L ZERO SET DIA L LMO SHAFT ZERO SET DRIVE PULLEY LOC KWASHE R 6 FLAT HEAD 6 32x3 8 SCREW DIAL MOUNTING PLATE 6 32 ...

Page 92: ...NOTE If the stud from the rear of the dial pointer will not fit into the slot in the dial pointer drive arm loosen the mounting hard ware of the dial pointer drive arm and move it as required Mount the dial mounting bracket on the LMO Use the two top front screws of the LMO Position the stud from the rear of the dial pointer into the slot of the dial pointer drive arm Remove the two top front scre...

Page 93: ... one of the following two steps 2 If the dial painter is to the right of the 5 marking loosen the dial pointer drive arm mounting screws and move the dial pointer drive arm base down until the pointer is at the 5 marking Do not move the dial pointer drive arm base left or right Retighten the screws 2 If the dial pointer is to the left of the zero marking loosen the dial painter drive arm mounting ...

Page 94: ...ol lockwasher a control flat washer and a control nut Do not tighten the nut at this time DIAL ESCUTCHEON REMOVE ANY EXC ESS OF A INT ALONG THIS EOGE BEFORE INSTALLING ESCUTCHEON INSIDE OF FRONT PANEL Refer to Detail 5 3A and install the dial escutcheon to the front panel with the drive shaft bushing assembly 455 42 Position the tabs at the top of the escutcheon inside the front panel Do not tight...

Page 95: ...nect a 2 black wire from lug 2 of meter Fe N8 to lug 12 of switch FF 8 1 Connect a 2 1 4 bare wire from lug 8 of switch FF 8 1 around the control solder lug 8 2 and through lug 10 8 2 to lug 11 8 1 of switch FF White green to lug 1 8 1 Brown to lug 2 8 1 White red to lug 3 8 1 Blue to lug 4 8 1 Yellow to lug 5 8 1 Green to lug 7 8 1 Red to lug 9 8 1 Refer to Pictorial 5 4 for the following steps C...

Page 96: ...shields and solder it Hold the shields between the solder con nection and the inner wires with long nose pliers while soldering Connect the free end of the bare wire to lug 4 of control FB 8 2 Black orange coaxial cable inner wire to lug 5 S 1 Violet wire to lug 7 8 1 Black blue coaxial cable inner wire to lug 6 8 1 Twist the shields of these three coaxial cables together Wrap one end of a 1 bare ...

Page 97: ...ithout slippage Tight en the dial drive bushing The amount of tor que required to turn the circular dial can be adjusted by moving the dial drive bushing up or down Remove the control nuts from the switches at FG FH and FK Secure the top corners of the front panel to the chassts using 6 32 x 3 8 phillips head hardware Slide the zero set drive pulley small shaft onto the zero set dial Position the ...

Page 98: ... the audio output transformer leads as follows 6 32 1 4 SCREW Blue to lug 3 of terminal strip TS 8 2 Red to lug 1 of terminal strip T8 8 2 Refer to Detail 5 6A and install the audio output transformer using 6 32 x 1 4 hard ware Both enamel leads to 1 1 4 Red to 1 1 2 Blue to 2 BLU RED Refer to Pictorial 5 6 fold out from Page 85 for the following steps Locate the audio output transformer and cut t...

Page 99: ...to the pulley assembly 100 458 Lightly grease the 3 16 dial shaft with silicone grease Center the bushing at FA as close as possi ble with the 3 16 dial shaft and tighten the bushing Slide the 3 16 dial shaft into this shaft coupling until 7 16 of the shaft extends from the front of bushing FA Tighten the setscrew in the shaft coupling on variable capacitor TD 17 64 TUBULAR SHAFT Loosen the front ...

Page 100: ...is just inside the opening in the top dial pulley Hook the other end of the spring to the tab at 1 String the pulley assemblies following the numbered sequence Be sure the string is wrapped around the lower pulley assembly tab at number 5 of the stringing sequence ONE COMPLETE LOOP Tie a loop in one end of the dial cord string and place this loop over the tab of the top dial pulley assembly Refer ...

Page 101: ...onnect the inner lead to lug 1of microphone connector FL 8 1 At the end of the prepared cable with the shield lead connect the inner lead to MIC 8 1 and the shield lead to GND B 1 of the carrier generator circuit board Pass the black wire coming from the coil enclosure through the small hole in the final amplifier enclosure and connect it to lug 1 of variable capacitor TF 8 1 NOTE Be sure the lugs...

Page 102: ...RRIE R NULL J _ r 0 I 0 I 9 I Z I r VI 8JIt __ 84 22 8 o o 00 SID llANO PLI TUDE BALANCE Vox DELAY I I I I _ _o I I I C r 0 c J f _ VIOL WHT VIOL V4 6EW6 i o o I o o o o 0 o 0 o o o o o o SLOT l C0 GO 1 j J o o 0 o o o o o ...

Page 103: ... switch permits the se lection of either the internal LMO or the ex ternal LMO in the SB 301 Receiver In the UNLOCKED posttion the LMO in the Tr ans mitter and the LMO in the Receiver operate independent of each other In the LOCKED RCVR positron the LMO in the Receiver con trols both units GR 3395 4kHz CW INSTALL IN MIDDLE SOCKET Y9 Y 11 INSET 3393 6 3395 4 3396 4 t fAlWlt5l I I SIDEBAND AMPLITUDE...

Page 104: ...he front panel Install a plastic lever knob on the outer shaft of the Level control Position the lever toward the unlocked position Tighten the setscrew Detail 5 8A SPLIT SHAFT BUSHING SMALL SHAFT TUBULAR SHAFT Install a 1 1 8 plastic knob on the small shaft at the Final position using a 1 4 split shaft bushing and an 8 32 x 1 4 setscrew Position the pointer at the 9 0 clock posi tion with tuning ...

Page 105: ...ED SIDEBAND AMPLITUDE BALANCE 1 2 rotation LEVEL 0 fully counterclockwise FINAL 80 ALC ADJUST 1 2 rotation Set all controls and switches as follows ANTI VOX fully counterclockwise Refer to Figure 1 2 fold out from Page 86 VOX DELA Y fully counterclockwise VOX GAIN fully clockwise BIAS ADJUST 1 2 rotation MODE ew Before installing the fuse or tubes the following resistance checks should be performe...

Page 106: ...rip AC Lug 3 Lugs 1 2 4 and 5 Terminal strip H Lug 5 Lug 3 Lug 4 Lugs 1 and 2 Terminal strip J NOTES RESISTANCE IMPORTANT The word Diode in the NOTES column of the following chart indicates that a diode is in the circuit under test Therefore the measured r eststance can vary due to the forward current of the diode and depending on the range setting of the ohmmeter The ohmmeter readings in the char...

Page 107: ... to OFF A VTVM reading of approximately 170 V DC should be present between pins 5 of tube sockets VIO and V11 and the chassis Install all tubes in their respective sockets except driver tube V9 6CL6 and replace the pilot lamp in socket TW Install the 4 ampere slow blow fuse in the fuseholder Use a 2 ampere fuse if you wired the Transmitter for 240 VAC opera tion NOTE The 2 ampere fuse is not fur n...

Page 108: ...CESSARY TRANS ITTEA MODlFlCATION REFER TO THE INSTALLATION ECTfON IN THE S8 303 RECEIVER MANUAL SB Ol TRANSMITTER 0 ACCESSORY LMO Bf VHf 1 HF O 7A SOCI ET SP At R UTE SPARE OUT OU Alii ANT 11 Y I YH 1 PHONES 1201240 VN tw G 11 SH fT Ol SH ANTI VO CW SH J T SPARl HF O OUT SPARE SPARE VHf Z ANf PUSH TO RESET IW 74U ...

Page 109: ...RATION OUTPUTS LMO o 0 0QO o 0 o 0 BFO HET OSC 120 VAC INPUT MUTE NTI VOX 500n HF ANT S8 301 RECEIVER MUST BE RG 62 U CABLE 24 LONG SUPPLIED WITH 58 301 RECEIVER TO KEY TO AC OUTLET TO ANTENNA TO 5PKR SB 401 TRANSMITTER 120 VAC INPUT RCVR MUTE RC R RCVR HET AUDIO LMO OSC I SPKR ANTI RCVR I nnn V X_8FO _ ...

Page 110: ...n F igure 2 IA The following test equipment is required for alignment of the Transmi tter Remove tube V9 from the transmitter Refer to Figure 2 2 fold out from Page 93 for test points and adjustment locations If tile Accessory kit is not g illg to be used the Transmitter should be connected to an S13 303 or SB 30 1 Receiver Refer to Figures 2 1 A and 2 1 B on the fold out from this page ALIGNMENT ...

Page 111: ... coil for a maximum indication 011 the VTVl I Disconnect the VTV 1 1 maximum Peak the 3 5 HET OSC heterodyne oscillator coil for Short lug 2 marked of the MIC connector to the chassis with a jumper wire or connect a microphone and press the push to talk button then with the VTVlVI still connected to Pin E alternately adjust the CARRIER NULL control and the capacitor for a minimum indication on the...

Page 112: ...rn the IODE switch on the Transmitter to the CW position Readjust the slug of the 7 0 GRID coil for a l tximtlm indication ou the VTVJ 1 Place the FUNCTION switch in the SPOT position Adjust the slug of the 7 0 PLATE driver coil for a maximum indication on the VTVM Place the Transmitter BAND switch in the 7 0 position and set the LMO slide rule Dial to 3 Place both BAND switches ill the 7 0 positi...

Page 113: ...ise Place the MODE switch in the LSB position and adjust the CARRIER NULL capacitor to the same VTVl l reading obtained in the previous step Key the Transmi tter arid adjust the DRIVER control for a maximllm indication on the VTVM Place the lVI0DE switch ill the USB position and adjust the CARRIER NULI J control for a rnillilTIltm indication on the VTVM Place the BAND switches in the 3 5 position ...

Page 114: ...ition Unplug the Transmitter line cord Connect the dummy load to the ANTENNA connector Do not use a light bulb as a dummy load Readjust the Neutralizing Capacitor for a minimum indication on the VTVM FINAL BIAS IMPORTANT Do not key the Transmitter for more than 30 seconds at a time until after you have completed the Final Transmitter Adjust ments Using an insulated screwdriver adjust the Neutraliz...

Page 115: ...IER NULL CONTROL ALe PILOT LAMP TW LMO FREQ SHIFT COIL o Y HETERODYNE OSCILLATOR TEST JACK PIN 2 I I NEUTRALIZING CAPACITOR I I BIAS ADJUST 29 0 DRIVER GRID COIL ON CHASSIS o o o V o o en 0 0 I m CJ bO i bO G u bO 0 r 0 0 0 0 i m rn o 0 O O O O O O __ __ A __ __ A __ _ 1 _ DRIVER PLATE COILS DRIVER GRID COILS HETERODYNE OSCILLATOR COILS ...

Page 116: ... INSET 2 FIGURE2 2 ANTENNA CONNECTOR lERMINAL BOARD 1 8 6 MH z TRAP CONNECT VTVM INSET 1 ...

Page 117: ...FIGURE 2 3 4o v ...

Page 118: ...FIGURE 2 4 METAL 1 2 6x3 8 SHEET SCREW USE REAR AMPLIFIER PLATE F I NA L I z I l ffi fti i f f rr T TOP AMPLIFIER PLATE F INA L ...

Page 119: ...L 10Dial BAND switch FUNCTION switch Set the controls on the Transmitter as follows 3 5 MHz 3 5 Full clockwise 1 4 clockwise HF STBY USB LMO Dial BAND switch RF GAIN control AF GAIN control ANTENNA switch FUNCTION switch MODE Set the controls 011 tile SR 303 Receiver as follows LMO ADJUSTMENT NOTE Before the LMO can be adjusted with an Amateur Band receiver a microphone must be connected to the Tr...

Page 120: ...each crystal CRYSTAL INSTALLATION ALIGNMENT WITH ACCESSORY Set the IODE switches of hoth units hack to USB If TOUr voice is not clear readjust the LMO DIAL of the Transmitter until YOtir voice is clear and switch both units back to the LSB mode If the signal is not clear adjust the L 10 FREQ SHIFT coil Repeat this Switch the Receiver and Transmitter 10DE switches to LSB Talk into the microphone If...

Page 121: ...gure 2 2 fold out from Page 93 for test point and adjustment locations 4 A Ilarn band Of good gerl ra coverage receiver with calibrated S meter such as IIeathkit Model SL 303 Turn the BAND switch from 3 5 to 7 0 and back to 3 5 to see that the oscillator starts oscillating If it does not turn the slug slightly until positive operation of the oscillator is obtained Readings of approximately 3 volts...

Page 122: ...itch to STBY Rotate the BAND switch to 3 5 Rotate the LEVEL control fully counter clockwise Connect the VTVM RF probe to the bare wire connected between pins 5 of tube sockets VlO and V11 on the bottom of the chassts Install the 6CL6 driver tube V9 The tube shield will be installed later NOTE Some VTVM RF probes may load a circuit and cause faulty tuning To check for this first adjust the coil for...

Page 123: ...n the MODE switch on the Transmitter to the CW position Place the FUNCTION switch in the SPOT position Place the MODE switch in the L8B position and adjust the CARRIER NULL capacitor to the same VTVM reading obtained in the previous step Place the BAND switch in the 7 0 position and set the LMO Dial to 3 Place the MODE switch in the USB position and adjust the CARRIER NULL control for a minimum in...

Page 124: ... out from Page 94 for the following steps Unplug the Transmitter line cord and wait approximately 5 minutes before continuing Turn the FUNCTION switch to the OFF position Install the final amplifier top plate on the final amplifier enclosure using 6 x 3 8 sheet metal screws Readjust the Neutralizing Capacitor for a minimum indication on the VTVM Install the final amplifier rear plate on the final ...

Page 125: ...CTION switch to SPOT Key the transmitter and readjust both the Driver plate and grid coils for maximum relative power output at each position of the band switch If an SU i03 SB 301 or SB 300 Receiver is l f irlg used set the FUN TI N switch to OPR NOTE In the following step after the Transmitter is keyed quickly adjust both the DRIVER and FINAl knobs for maximum output before adjusting the Driver ...

Page 126: ...n Turn the FUNCTION switch of the Trans mitter to the SPOT position Turn the METER switch to GRID Turn the LEVEL controll 4 turn clockwise TUlle tIle Transmitter to full REL PWR output into a 50 n dummy load on the 3 5 band Refer to steps B through I on Page 114 Then return to the steps below FINAL TRANSMITTER ADJUSTMENT FREQUENCY SHIFT ADJUSTMENT Turn the FUNCTION switch to the STBY position Turn...

Page 127: ...EW HEA T K rT Install the 8 32 x 1 4 nickel screws into the front side holes of the cabinet Install rubber feet and 3 4 to 1 tapered spacers at the front corners of the cabinet using 6 32 x 1_1 2 screws and 6 flat washers NOTE Extra 6 32 x 3 4 screws are supplied so that the spacers may be eliminated if desired Carefully turn the chassis and cabinet over and install a rubber foot at each rear corn...

Page 128: ...rOR TRANSCEIVE OPERATION rOR THE NECESSARY TRANSMITTER ODIFICATION REFER TO THE I NSTALLATION SECTION IN THE 58 303 RECEIVER MANUAL SB 401 TRANS ITTER S8 303 RECEIVER ACCESSORY LMO BFO VHf HF O 7A SOCKET SPEAKER MUTE PAW OUT our AI ANT 01 1 II PHONES 120 240 VAC v ANTI VOX C J I SH T PAPI HFO OUT oPAf lf J AR ml AN PUSH TO Rf SET ...

Page 129: ...ure 4 lA shows the Transmitter connected to a Model SI w303 Heceiver for transceiver operation Refer to the SB iO i Manual for rno dif ications that mu sl be made in tile SB 401 Transmitter for this arrangeme nt Refer to Figure 4w1B if an SB 401 Transmitter is used with a Model S13 301 Receiver for transceiving The Transmitter includes all antenna switching relay Because of the heat generated by t...

Page 130: ...l SI 30J or SB 300 refer to Figl rt 4 3 In this case transccivc is not possible Figure 4 2 shows the Transmitter connected to the Heathkit Model SB 200 Linear Amplifier The Receiver and an external antenna relay are connected for transceiver operation as shown in Figure 4 1 except that the antenna cable from the linear amplifier connects to the antenna re lay instead of the cable from the transmit...

Page 131: ...UT SOOP ANTENNA EXT ANT RELAY 1 20 VA C RCVR ANT RCVR A UD I 0 A I SPKR VOX TO ANTENNA TO SPEAKER TO KEY TO AC OUTLET KEY 120 VAC INP UT TO RECEIVER AUDIO OUTPUT 58 401 TRANSMITTER S8 401 TRANSMITTER CONNECTED TO RECEIVERS OTHER THAN HEATHKIT S8 303 S8 301 OR 58 300 Page 107 ...

Page 132: ...R SET AT 0 ALC VOLTAGE ALC o 500 MA Normal 250 rna 0 10 10 FINAL GRID CURRENT PLATE SCALE READING MEASURES 0 500 FINAL PLATE CURRENT o 1 MA Normal 0 0 1 RANGE OF READING FIGURE 5 1 0 10 GRID METER SWITCH POSITION PLATE CURRENT 0 500 MA HIGH VOLTAGE 0 1000 VOLTS un9 C1 1 J G RID CUR R E N T 0 1 M A RELATIVE POWER O tO The 0 to 500 scale is read directly to indicate plate current in milliamperes The...

Page 133: ...03 RECEIVER heterodyne Oscillator Adjustment procedure l lsirlg tile Sf 03 calibrator signal with the Transmitter connected to the Receiver It is not ne essary t o turn tile Transmitter on Io r t hese adju st me It Is The followillg operation information is divided into two separate sections Operation with SB 3 Receiver transceiver operation an d Transmittcr Operation Only Each of these sections i...

Page 134: ...than the zero beat Switch the Receiver MODE switch to CW only if the CW narrow band pass filter is in the Receiver The Receiver and Transmitter are now on the same ire SWITCH OR TRANSMITTER RECEIVER COMMENTS CONTROL FUNCTION TRev STBY MODE CW USB Key plugged into KEY jack with key open BAND SAME AS DESIRED Adjust the Receiver main RECEIVER BAND tuning for desired frequency or open spot on band MET...

Page 135: ...nience until the Receiver audio will no longer trip the VOX circuit of the Transmitter Tune up the Transmitter using steps A through I of the CW Transmitter Only tune up chart on Page 114 The only differ ence is that the operating frequency is determined by the Receiver SWITCH OR TRANSMITTER RECEIVER COMMENTS CONTROL FUNCTION TRCV STBY MODE USB or LSB USB or LSB Receiver and Transmitter must be se...

Page 136: ...encies Plate current is approximately 150rna height as the CW or single tone pattern of Figure 5 2 indicating maximum power input NOTE Plate current peak reading is approx imately 1 2 ofthe amplitude or less ofthe maxi mum single tone reading due to meter inertia and voice characteristics Plate current is approximately 100 rna NOTE Movement of the meter pointer with the Meter switch in the ALC pos...

Page 137: ...Tuning for desired frequency or open spot on band MODE CW Plug key into KEY jack with key open METER REL PWR VOX DELAY As desired ANTI VOX Not used LEVEL Fully counterclockwise FREQ CONTROL UNLOCKED FINAL LOAD 50 n FINAL tune Desired band Set all switches and controls as follows CW TUNE UP Page 113 ...

Page 138: ...ER switch to REL PWR and adjust for indication maximum meter plate current will be approximately 220 rna D DRIVER Adjust for maximum re ttve power meter reac Then turn METER switch to PLATE Ip mg should be about 220 ma E REL PWR Set METER switch to REL PWR and adjust for a half scale ADJUST reading when fully loaded on the 3 5 band F MODE CW G LEVEL Key the Transmitter and quickly adjust the LEVEL...

Page 139: ...n the same band NOTES SWITCH OR SWITCH OR CONTROL CONTROL COMMENTS POSITION FUNCTION STBY MODE USB or LSB Usually LSB on 3 5 and 7 0 bands and USB on 14 0 and higher bands METER REL PWR VOX GAIN Fully clockwise If background noise trips VOX reduce VOX GAIN until noise has no effect ANTI VOX As required If the receiver audio output trips the Trans mitter VOX advance the ANTI VOX until the receiver ...

Page 140: ...ith the Meter switch in the ALe position during transmitter standby periods it is norm al for the meter to deflect full scale Speak into the microphone normally using VOX operation Adjust the VOX GAIN con trol for the microphone sensitivity desired to turn onthe Transmitter The VOXDELA Y control should be set for the hold in time desired after the operator stops talking The VOX DELAY and VOX GAINc...

Page 141: ...troubleshooting the Transmitter refer to the Resistance and Volt age Charts fold out from Pages 145 and 146 the Circuit Board X Ray Views on Page 139 and the Chassis Photographs shown in Figures 6 21 through 6 27 on Pages 141 through 144 3 Check to be sure that all tubes are in their proper locations Make sure that all tubes light up properly 9 Retighten all hardware 2 About 90 of the kits that ar...

Page 142: ...V3 4 Check wiring of relay RL1 5 Bias voltage not removed from tube socket V3 6 Shorted coaxial cable to Mode switch Full scale plate current meter reading with no Signal input No final plate current 1 Check voltages and wiring of tube socket VB 2 Check Band switch Wiring 3 See that crystals are in proper sockets 4 Poor or no ground connection at crystal sockets 5 Incorrect wiring of coils 6 Regul...

Page 143: ...e oscillator not functioning 6 Check voltages and wiring of tube sockets V4 and V5 7 Relay RLI improperly wired 8 Bias not removed from pin 1 of tube socket V5 9 Pin 2 foil of tube socket V5 shorted to ground 10 Cable to SB 301 not connected or FREQ CONTROL switch not in LOCKED position No RF voltage at pin 2 of driver tube socket 6CL6 V9 1 Defective crystal diodes 2 Balanced modulator transformer...

Page 144: ...t of parts not covered by the warranty Prepare a letter in duplicate containing the following information If it is not convenient to deliver your kit to a Heath Authorized Service Center please ship it to the factory at Benton Harbor Michigan and follow the following shipping instructions To be eligible for replacement parts under the terms of the warranty equipment returned for factory repair ser...

Page 145: ...ance 100 watts on 80 through 15 meters 80 watts on 10 meters 50 n nonreactive load RF Power Output SSB 180 watts P E P cw 170 watts DC Power Input Continuous wave CW Single sideband SSB suppressed carrier with selectable upper or lower sideband Types of Emission Less than 100 Hz drift per hour after 20 minutes warmup under normal ambient conditions Less than 100 Hz drift for 10 line voltage var ia...

Page 146: ...s Break in CW provided by operating VOX from a keyed tone using grid block keying Keying Characteristics Internally switched to speaker with transmitter in CW mode and key depressed Approximately 1000 Hz tone CW Sidetone High impedance or phone patch Audio Input 10 db nominal at 0 2 rna final grid current Audio Compression 350 to 2450 Hz 3 db Audio Frequency Response At least 40 db below rated car...

Page 147: ...Weight Cabinet Dimensions 105 125 or 210 250 volts AC 50 60 Hz Standby 80 watts CW 260 watts key down 14 7 8 wide x 6 5 8 high x 13 3 8 deep Power Requirements Transformer operated Power Supply 5 Crystal Diodes Balanced Modulator and Relative power metering 12 Silicon Diodes Power Supply VOX Recti fiers ALC Rectifiers and DC Blocking Diode Complement 1 OA2 Regulator 1 SAUS Isolation Amplifier 1 SA...

Page 148: ...RELAY AMP I c TRANS V8B 1 26AW8 V HET OSC rscv r RELAY RLI sse W VS 6EW6 P HETEROOYNE MIXER 0 BANDPASS COUPLER 8 395 8 895 MHz V6 i R7 LINEAR MASTER OSCILLATOR 5 5 5 MHz sse LMO MIXER V4 6EW6 sse P XTAL FIL TER 3 395 MHz RCVR I BFO INPUT 1 SPKR A V8A 1 26AW8 _ JI I HET OSC AMPLIFIER _0 TRCV 1 C JY 0 TRANS V1 OA2 VOLTAGE REGULATOR V2B V2C 13 6AV11 1 36AV11 USB OR CW SIDEBAND CATHODE GEN FOLLOWER V2...

Page 149: ...switches are shown in their fully counter clockwise positions on the Schematic The Fre quency Chart Iiststhe various frequencies that will be found throughout the Transmitter The first line contains the frequencies referred to in this Circuit Description The letter number designations on the Schematic Diagram are used to identify resistors capac itors chokes etc Each of these designations is relat...

Page 150: ... preamplifier tube VIA Capacitor C101 limits the low frequency response of the input signal while capacitor C102 limits the high fre quency response Any RF signals that may be picked up by the microphone are bypassed to ground by capacitor CI02 The amplified signal from VIA is coupled through capacitor Cl05 and Mic Level control Rl to the cathode follower tube VIB VIB is used to match the low impe...

Page 151: ...by audio picked up from the receiver speaker by the microphone An audio signal from the station receiver is coupled through the Anti VOX input socket and Anti VOX control R141 to the grid of V13A This Signal is ampli fied by V13A coupled through capacitor C13S and rectified by diode 0106 The negative volt age present at the resistance capacitance net work of resistor R146 and capacitor C139 is cou...

Page 152: ...uency approximately 1000 Hz is determined by the phase shift network P E C This audio tone is used to perform two func tions first to key the VOX amplifier so that break in CW operation is instantaneous with the TONE OSCILLATOR AND TONE AMPLIFIER F igure 6 4 Figure 6 4 01 0 I C 43 68 CI44 1M 47K V13B 1 2 6J I I TONE OSC R 54 RIJ9 470 CI 35 10 V12C 1 3 6010 SIOETONE AMP RL1 PARTIAL TONE OUTPUT LEVE...

Page 153: ...ith the receiver tuned 1000 Hz above the received sig nal the transmitter CW carrier generator auto matically compensates and transmits a signal 1000 Hz below the receiver dial setting This allows the transmitted and received signals to be on the same frequency yet allowing the receiver to produce an audible tone LSB USB CW CARRIER GENERATOR AND CATHODE FOLLOWER Figure 6 5 V2A and V2B are Colpitts...

Page 154: ...s Neither the audio or carrier Signal appears in the output but the effect of the audio signal un balancing the nulled circuit at an audio rate produces the sum and dUference frequencies called sidebands With no audio there is no output from the balanced modulator CW USB RI6 IOK R402 68K IW LSB fROM CARRIER GENERATOR CATHODE FOLLOWER TUNE 270 PF TO ISOLATION AMPLIFIER R401 CI09 47K CARRIER NULL 0 ...

Page 155: ...0 The crystal filter is a 2 1 kHz lattice type de Signed to pass the usable LSB 3393 6 kHz and USB 3396 4 kHz modulated Signals and a carrier 3395 4 kHz frequency The carrier fre quency is used in the CW and Tune Modes The resulting low impedance Signal is coupled through capacitor C 118 to the grid of LMO linear master oscillator mixer V4 NOTE Resistance measurements on the crystal filter are not...

Page 156: ... fall outside its frequency range In the Transceive mode B voltage is removed from V8A and applied to V8B the heterodyne oscillator amplifier V8B amplifies a hetero dyne oscillator signal from the receiver and uses the same coils L1 through L8 as did V8A for proper plate tuning The output signal is coupled through capacitors C49 and C209 to the grid of heterodyne mixer V5 The carrier generator sig...

Page 157: ...heterodyne oscillator fre quency of 12 395 megahertz results in a heter odyne mixer output frequency of 3 895 mega hertz z z Z J W a a a en IX RED o o BlK 3 5 0 0 0 0 0 cO C I C I C I 83F C3 __ __ Io05 0 0 0 0 C56 0 C55 0 0 CI _ C54 C53 _ C52 t It 50 I 62 100 0 100 co 270 PF Cf PF t f I I ct Q PF Q PF ct PF DRIVER GRID COILS C51 Toos Figure 6 11 TO KEYED 81AS I I I I I _I L_ __ 01 22PF 3 12 PF 8 6...

Page 158: ...roo K R Fe II V8A 1 2 6AW8 HET OSC WHT B2R C 2 PF C49 I I I I I TO HET MIXER l OI C209 J 005 C45 22PF 005 C43 ISOPF 01 C42 _ J05J J H V8B 1 2 6AW8 RCVR HEr OSC AMP C46 H ET OSC INPUT RrCIO EO 100PF C39 BlK 68PF C38 7 0 BRN 62PF CJ7 14 0 B2F VEL 22PF CJ6 21 0 LU L5 GRN 28 0 6800 R23 L4 28 S WHT ORG 29 5 VIOL HETERODYNE OSC COILS 010 WHT VIOl F2R VIOL REO TOlMO MODE SWITCH REGULATED B ...

Page 159: ... 8 7 0 RFC6 5MH R6 750 o O I Vl1 6146 FINAL AMP e27 22 PF C28 150 PF 005 005 005 BOM 3 5 R 10 R 3 10 R8 10 C 9 CI7 Cl5 40M 7 0 FINAL TUNE 005 005 005 005 METER CIRCUIT REL POWER 20M 14 0 R9 10 RI2 10 R7 10 C26 C2 _ CI8 L _ CI6 CI4 L21 RELAY RL2 15M 2 I 0 L20 10M 28 0 RCVR ANTENNA T 005 1 6KV B5F RFC 7 Vl0 6146 FINAL AMP ANTENNA C25 C9 FROM 1 RFC 5 DRIVER 001 R NEUTRALIZING TO C2 l I C24 DRIVER r__...

Page 160: ...ettings of the Level control FINAL AMPLIFIERS Figure 6 13 This bias voltage is fed to the grid of V3 effectively limiting its output and thereby re ducing the drive available to the final ampli fiers The output Signal of the driver stage is coupled through capacitor C9 to the grids of the final amplifiers In this instance at a frequency of 3 895 megahertz Neutralizing energy is coupled from the fi...

Page 161: ...l a C23 2 1 19 6 PF NEUTRALIZING C24 7 5PF IO RF C4 1 MH FROM FINAL AMPLIFIER PLATE CIRCUIT C8 2700PF CII V9 6eL6 DRIVER 84 R C9 _ 4 _ _ 4 L_____ro FINAL AMPLIFIER r GRID CIRCUIT 001 R301 47K RFC 3 C302 FROM HET t OSC 100PF RJ02 CJ04 C5 C6 R4 C7 C4C R5 150 3300 6800 10K 2 005 005 W 005 I IW I I I I I DRIVER TUNE TO KEYED BIAS 001 B Page 135 ...

Page 162: ... connected in a full wave voltage doubler circuit The diodes are connected so that during one half of the AC cycle capacitor C78 becomes charged and during the next one half of the AC cycle capacitor C79 is charged resistors R44 and R45 provide a discharge path for these capacitors The capacitors are charged indtvid 120 VAC PRIMARY WIRING YEL GRN C76 __ __ 1 005 4KV ACCESSORY SOCKET VIEWED FROM CH...

Page 163: ...nt causing the cathode to be come less positive and the screen to become more positive The voltage difference developed across the meter causes a current through the meter which indicates ALC action inthe Trans mitter All tube filaments receive voltage from a sep arate power transformer filament winding yel low green and yellow green leads The primary winding of the power transformer is fused and ...

Page 164: ...e voltage doubler Relative Power Figure 6 20 Figure 6 20 With the meter connected in parallel with re sistor R42 and in series with R43 and with 500 volts from the power supply impressed across this resistor combination there will be 1 milliampere of current through the meter A current of 1 milliampere through the meter will cause full scale deflection Resistor R42 limits the voltage on the Meter ...

Page 165: ...MIXER BANDPASS CIRCUIT BOARD CARRIER GENERATOR CIRCUIT BOARD CIRCUIT BOARD X RAY VIEWS VIEWED FROM FOIL SIDE Page 139 ...

Page 166: ...TERMINAL BOARD 2 I _ _ _ _ _ _ _ _ _ _ _ J _ C 304 _ _ _ _ _ _ _ _ 0 _ _ 0 _ _ TERMINAL BOARD 1 R39 o V9 Page 140 ...

Page 167: ... c 1 fj z_ C 29A L C 29 B C 29C RFC9 RFC1 Figure 6 22 C 26 C24 C 23 R36 L 121 L 20 C19 C 78 R 1 R19 F L 1 Figure 6 21 HETERODYNE OSCILLATOR TEST POINT T3 R 38 Rl R 22 R16 PHOTOGRAPHS CHASSIS Page 141 ...

Page 168: ... R2 R44 C1 R43 J l C 81 C65 R45 R35 09 C28 C80 C69 RFC6 R37 RFC5 RFC4 C2 RFC12 Cll C63 L16 C64 L15 RL2 Figure 6 23 C 31 R4 R5 R6 Ct8 C66 C8 Rt7 C68 R12 C5 R13 C7 C15 RFC3 R8 C 5 1 C19 L9 R 11 C57 C72 Ll0 Cl1 C56 C13 C3 C 32 R 32 R34 L 11 C21 Page 142 ...

Page 169: ...Figure 6 26 C 33 C35RL1 R15 C 34 R 14 C45 C47 C44 R24 C42 RFC10 R23 R 26 R27 C40 R FC 11 C48 __ _R 3 9 f Figure 6 25 R30 RFC13 C49 C43 _ _ _ _ _ R 18 Page 143 c ...

Page 170: ...Figure 6 27 L6 C 37 L4 L 1 C4A C4B C4C C4D L 12 R 31 C54 eso C 38 L17 C59 L8 L18 L5 C6 L7 C62 L19 C 39 L2 C36 L3 L 1 3 L14 C52 R 28 C53 R29 Page 144 ...

Page 171: ...6 GROUNDED BY MODE SWITCH 17 VARIES WITH SETTING OF BIAS ADJUST CONTROL le HETERODYNE OSCILLATOR INPUT FROM RECEIVER IN TRANSCEIVE ONLY 19 VOLTAGE IN TRANSCEIVE ONLY 20 VARIES BETWEEN LSB USB CW AND TUNE 21 PROVIDES BIAS VOLTAGE TO UNBALANCE BALANCED MODULATOR 22 TO CHASSIS 23 INFINITY IN USB OR LSB 24 APPROXIMATELY 50 K AFTER A FEW SECONDS IN LSB OR USB 25 GROUND IN CW AND TUNE OPEN MINIMUM AFTER...

Page 172: ...25K o 15 20K lOOK 50 K 10K 50K n TERMINAL 16TK B O A R D NO 2 6000 26K o 6 150 47K 20 K 10K rr I 59K 4200 10K 600 1 66 20K 0 1 1 66 50K o 0 70 K 20K 10K 35K 150 15 20K 26 K 70K It 1 66 1 66 2 0 6 50 10K 20K 10K 10K 1 66 20K 750 3000 TERMINAL BOARD NO 5 _ _ 5y 10K 30K ...

Page 173: ...o o o CHART VOLTAGE J o _ J o TERMINAL BOARD 2 180 1RF 250 1 o o 0 TERMINAL BOARD 1 JI0 8 t7 214 150 255 co ...

Page 174: ... 16 GROUNDED BY MODE SWITCH 17 VARIES WITH SETTING OF BIAS ADJUST CONTROL 1 HETERODYNE OSCILLATCR INPUT FROM RECEIVER IN TRANSCEIVE ONLY 19 VOL TAGE IN TRANSCEIVE ONLY 20 VARIES BETWEEN LSB USB CW AND TUNE 21 PROVIDES BIAS VOL TAGE TO UNBALANCE BALANCED MODULATOR 22 TO CHASSIS 23 INFINITY IN USB OR LSB 24 APPROXIMATELY 50 K AFTER A FEW SECONDS IN LSB OR USB 25 GROUND IN CW AND TUNE MINIMUM AFTER 5...

Page 175: ...B FIL BIAS I I 5000 OK RFC 2 I SHifTER COIL 5000 01 10 OUTPUT COIL 2 10 OSC 2500 2100 12 285 5000 1000 OUTPUT COIL 47 t t 2200 0 45 350 5000 RFC f 5000 330K 6 BZ6 LM 0 SCHEMATIC Page 147 68v 150v 6 3vac ...

Page 176: ...1 33 21 78 RESISTORS 1 2 Watt Disc cont d 1 42 10 270 0 21 14 10 001 Mfd 1 7 10 6800 21 27 10 005 Mfd 1 9 10 1000 0 21 16 10 01 Mfd 1 16 10 4700 0 21 31 10 02 Mfd 1 24 10 33 KO 1 25 10 47 KO GENERAL 1 29 10 220 Kg 40 479 25 3 5 pH coil 52 65 5 00 Bandpass coupler CAPACITORS transformer Mica 434 129 15 7 pin tube socket 331 6 15 Solder 20 99 15 22 pf 85 154 1 20 102 15 100 pf 1 05 Mixer bandpass ci...

Page 177: ...1 27 10 21 59 1 20 25 34 2 10 26 24 2 20 26 74 3 75 26 77 5 50 26 92 2 85 CAPACITORS Each No Each No PART PRICE DESCRIPTION PARTS LIST 3 PART PRICE DESCRIPTION CHASSIS PARTS CAPACITORS CONTROLS 10 147 75 200 n linear Mica 10 150 65 5000 n linear 20 52 15 7 5 pf 10 148 60 10 Kn linear 20 100 15 30 pf 10 149 60 5GOKO linear 20 97 15 50 pf 10 151 80 10 megohm linear 20 114 20 270 pf 20 107 40 680 pf ...

Page 178: ...46 43 1 65 100 19 20 204 9 10 423 1 55 437 1 10 456 4 70 481 1 10 481 3 10 490 85 15 490 5 10 489 1 15 10 24 x 1 1 8 screw 10 24 nut 10 24 wingnut 10 flat washer 10 lockwasher 10 Hardware 250 191 05 252 30 05 252 31 10 253 19 05 254 3 05 6 Hardware 250 27 05 250 26 05 250 89 05 250 56 05 251 1 05 252 3 05 253 25 05 254 1 05 259 1 05 259 6 05 253 2 05 CONN ECTORS SOCKETS JACKS 432 4 10 Male line co...

Page 179: ...8 KO 2 45 1 30 500 1m precision Tuners are availahle at half price plus postage on an exchange basis the defective unit returnable after replacement is received Tuner returned must be in repairable condition PART PRICE DESCRIPTION No Each RESISTORS PARTS LIST 4 CHASSIS WIRING Linear master oscillator Chassis 100 40 63 30 200 469 1 5 40 Items from Pack 5 PART PRICE DESCRIPTION No Each 100 450 Packa...

Page 180: ... 63 343 Band switch 5 section B position Mode switch 4 section 4 position Function switch 2 section 5 position SPDT relay 5 pole DT relay 5 40 5 00 3 40 5 00 9 70 63 341 63 342 SWITCHES RELAYS Other Hardware 252 7 05 254 4 05 259 10 05 260 29 25 260 39 05 258 5 10 258 6 05 METAL SHIELDS 205 87 10 206 233 50 206 234 35 206 235 80 206 236 55 3 Hardware 250 172 05 250 49 05 250 63 05 252 1 05 254 7 0...

Page 181: ... 411 63 411 96 411 124 411 168 411 170 411 186 411 199 2 3 8 for 9 pin tube socket 1 3 4 for 9 pin tube socket 1 3 4 for 7 pin tube socket Pilot lamp shield TUBOES PART PRICE DESCRIPTION No Each Female terminal pin Crystal socket Coaxial jack Phono plug Switch shaft coupling Metal capacitor mounting wafer 6146 tube 6 allen wrench DESCRIPTION Other Harqware 250 260 15 250 93 05 250 156 10 250 251 2...

Page 182: ...lamp 4 ampere slow blow fuse Male microphone connector Female microphone connec tor Pilot lamp socket Phono plug Dial pulley 3 7 8 long shaft 9 3 8 long shaft 8 1 4 long tubular shaft 15 32 long bushing 1 4 t long bushing Split bushing Metal shaft coupling Silicone grease Alignment tool Dial escutcheon Open end wrench 4 allen wrench DESCRIPTION PART PRICE No Each General cont d 455 13 10 455 11 10...

Page 183: ...PI WHICH CONNECTS I CONTACT OH OlE SIDE OF THE IIOTOR TO CONTICTS ON TH OTHER SIDE Of TIoE s t IE ROTOII 6 SWITCH WAF IU IIIE IDENTIFIED AS IN THE FOLLOWING I lE BANOI a I I WIFEII NI a4 It I FIIONT SIDE Of THE IFEII WIlli TlIE SWITCH II II AR SIDE OF THE WI F R VIEWED 110l0I THE RONT PI NEl u wl PIIITI MQIMT O ON THE CHAUIS PAlin OH TlIE CARIIIEIt GElEltATOII CIRCUIT 00t01l 0 PIlI n ON THr MIXER ...

Page 184: ... O l CO U e 1 CT 110l Yl1C CAP CITOn f I ACI I UIlP 111 111 11 111 III prill III 1 11111tll i ht lU I lIH II 11 1 1 1 1I1l1l11 1111 ltlllllnClc dl 1 1 11 l IJi l ChIll I til IJI I tl I unit tv U lid tv 8 f lee lr nl 111U11I1I1 III 1111 rH IliIt It I IIll I Citlll d III U l1 I TVPICAL COMP CJ I I r TVPES HC6 u ...

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Heathkit SB-401, Assembly Manual

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