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Heathkit HW-9, User Manual, Page: 1 / 146

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Summary of Contents for HW-9

Page 1: ...for the DELUXE QRP CW TRANSCEIVER Model HW 9 HEATH COMPANY BENTON HARBOR MICHIGAN ...

Page 2: ...ignment VFO Alignment BFO Alignment Mixer Filter Alignment T R Board Adjustments 79 79 80 81 Final Assembly 85 Installation and Operation 86 Rear Panel Connections 86 Front Panel Controls 88 In Case of Difficulty 89 Visual Checks 89 Precautions for Troubleshooting 90 Checking Transistors and Diodes 90 Troubleshooting Charts 91 Specifications 95 Circuit Description 98 Circuit Board X Ray Views Illu...

Page 3: ...in signal path of the receiver sec tion This is done to reduce spurious responses bir dies and to maintain high image rejection Power for this Transceiver can be furnished by a power supply such as the Heathkit Model PSA 9 Power Supply or directly from any regulated 12 6 VDC source that can supply at least 1 ampere To align this Transceiver you should have a VTVM vacuum tube voltmeter or VOM volt ...

Page 4: ... it to its container after you identify it Leave these parts there until you actually use them in a step This will help pre vent you from mixing up the parts and help you identify the parts when you need them Some parts however are in a bag or envelope that is not marked with an actual part number but with a packaging number that begins with the number 173 These numbers are used for packaging pur ...

Page 5: ... the overall operation for a group of assembly steps Details generally illustrate a single step When you are directed to refer to a certain Pictorial for the following steps continue using that Pictorial until you are referred to another Pictorial for another group of steps 3 Most kits use a separate Illustration Booklet that contains illustrations Pictorials Details etc that are too large for the...

Page 6: ... connection will form an electrical connection between two parts such as a component lead and a circuit board foil A bad solder connection could prevent an otherwise well assembled kit from operating properly It is easy to make a good solder connection if you follow a few simple rules 1 Use the right type of soldering iron A 22 to 25 watt pencil soldering iron with a 1 8 or 3 16 chisel or pyramid ...

Page 7: ...ite Color Black Brown Red Orange Yellow Green Blue Silver Gold Multiplier 1 10 100 1 000 10 000 100 000 LOOO OOOi 0 01 0 1 Capacitors will be called out by their capacitance value in xF microfarads or pF picofarads and type ceramic Mylar electrolytic etc Some capacitors may have their value printed in the following man ner EXAMPLES 151K 15 x 10 150 pF 759 75 X0 1 7 5 pF First digit of capacitor s ...

Page 8: ...me direction as the printing on the circuit board 3 When you install electrolytic or other tubular capacitors always position each capacitor so the value is facing away from the circuit board see Figure 3 Be sure to observe the correct polarity when you install electrolytic capacitors as you will be directed in the steps Other non polarized capacitors should be installed so you can read the values...

Page 9: ...COMPONENTS NOTE These parts are taped on a strip which was checked before shipment Since these parts are taped in the order of assembly you may not wish to check them against the following list HEATH QTY DESCRIPTION CIRCUIT Part No Comp No RESISTORS NOTE The following resistors are rated at 1 4 watt and have a tolerance of 5 A 5 tolerance is indicated by a fourth color band of gold 6 470 12 3 47 n...

Page 10: ...rn blk yel R126 R144 R152 6 224 12 1 220 kft red red yel R136 6 334 1 2 1 330 kft org org yel R134 6 155 12 1 1 5 Mft bm grn grn R146 HEATH Part No QTY DESCRIPTION CAPACITORS 21 761 32 01 jtF 103 glass ceramic CIRCUIT Comp No 21 762 1 1 iF 1 04 glass ceramic C102 C112 C129 C141 C145 C153 C162 C176 C181 C191 C193 C197 C209 C214 C217 C219 C177 C107 C121 C139 C143 C151 C157 C174 C178 C189 C192 C195 C...

Page 11: ... C152 A2 21 22 1 220 pF C221 A2 21 17 1 270 pF C222 A2 21 722 1 330 pF C201 A2 21 56 1 470 pF C196 A2 21 13 1 500 pF C198 A2 21 191 3 510 pF C183 C185 C187 A2 21 171 2 680 pF C199 C223 A2 21 140 2 001 xF 1000pF C103 C215 B2 40 2076 4 14 lH coil violet 6 3 jjlH coil B2 40 2075 3 44 jjlH coil B2 B3 B4 B5 B5 40 2070 40 21 1 1 45 73 45 625 45 621 1 1 1 2 4 3 m H coil 5 5 ljlH coil 2 2 choke red red go...

Page 12: ...344 2 5 Black stranded wire 344 59 2 White solid wire 344 3 18 Large red stranded wire 344 163 6 Small black solid wire 344 170 7 Violet solid wire 347 55 4 8 wire cable F1 F1 F2 F3 F4 10 918 1 0 941 85 2801 1 206 1463 475 1 0 597 260 1 500 a control 100 kn control Oscillator circuit board Oscillator shield 0 Ferrite bead Blue and white label Parts Order Form Taped Component Chart Assembly Manual ...

Page 13: ...ven only at the end of a series of similar steps You may solder more often if you desire In the following steps you will be given detailed instructions on how to install and solder the first part on the circuit board Read and perform each step carefully Then use the same procedure when ever you install parts on a circuit board Note that the circuit board has foil on one side and component outlines...

Page 14: ... foil melt the solder SOLDERING SOLDER 3 As the solder begins to melt allow it to flow around the connection Then remove the solder and the iron and let the connection cool SOLDERING SOLDER Cut off the excess lead lengths close to the con nection WARNING Clip the leads so the ends will not fly toward your eyes Check each connection Compare it to the il lustrations on Page 15 After you have checked...

Page 15: ...lder to obtain a good connec tion SOLDER BRIDGES A solder bridge between two adjacent foils is shown in photograph A Photograph B shows how the con nection should appear A solder bridge may occur if you accidentally touch an adjacent previously sol dered connection if you use too much solder or if you drag the soldering iron across other foils as you remove it from the connection A good rule to fo...

Page 16: ...s follows R105 8200 ft gry red red resistor R139 3900 ft org wht red resistor R142 47 ft yel viol blk resistor R138 100 ft brn blk brn resistor C189 01 y F 103 glass ceramic capacitor R129 47 ft yel viol blk resistor Rl 34 3 30 kft org org yel resistor R128 47 ft yel viol blk resistor Solder the leads to the foil and cut off the ex cess lead lengths Install components in Section 3 of the circuit b...

Page 17: ...5 01 ilF 103 glass ceramic capacitor D118 1N4002 57 65 diode Solder the leads to the foil and cut off the ex cess lead lengths ns as ns all components in Section 5 of the circuit board ollows D102 BA 244 red yel yel 56 646 diode C139 01 iF 103 glass ceramic capacitor D104 BA 244 red yel yel 56 646 diode C141 01 ixF 103 glass ceramic capacitor Skip D106 and C142 C143 01 fiF 103 glass ceramic capaci...

Page 18: ...r R163 1500 ft brn grn red resistor Rl65 270 ft red viol brn resistor C214 01 jxF 103 glass ceramic capacitor Solder the leads to the foil and cut off the ex cess lead lengths s all components in Section 8 of the circuit board ollows C153 01 jjlF 103 glass ceramic capacitor C157 01 xF 103 glass ceramic capacitor C162 01 xF 103 glass ceramic capacitor Skip C166 R172 22 kft red red org resistor C218...

Page 19: ...l brn blk yel resistor NOTE Mount this resistor vertically D142 1N4149 56 56 diode Solder the leads to the foil and cut off the ex cess lead lengths Refer to Pictorial 1 2 Illustration Booklet Page 3 for the following steps parts NOTE strips NOTE When a step directs you to install a PCB pin in a circuit board push the shorter end of the pin as far as possible into the circuit board hole Then turn ...

Page 20: ...e following outline OUTLINE COMPONENT f NUMBER wooo Solder the leads to the foil and cut off the cess lead lengths Heathkit Install parts in Section 3 of the circuit board as fol lows Ferrite bead at FB Wire socket at TP102 Two ferrite beads at FB FB PCBpinatE Wire socket at GND Solder the leads to the foil and cut off the ex cess lead lengths Install four ferrite beads in Section 4 of the circuit...

Page 21: ...icult to solder the leads to the foil INSULATION lNSULATION II C101 33 pF ceramic C103 001 xF 1000 pF ceramic C198 500 pF ceramic C196 470 pF ceramic C194 4 7 pF ceramic C188 4 7 pF ceramic C186 18 pF ceramic Solder the leads to the foil and cut off the ex cess lead lengths ns as all capacitors in Section 2 of the circuit board ollows C105 300 pF mica C109 200 pF mica SkipCll4 C118 160 pF mica Ski...

Page 22: ...s to the foil and cut off the ex cess lead lengths nstall capacitors in Section 6 of the circuit board as follows C152 100 pF 100K ceramic C156 47 pF ceramic ns as C161 24 pF ceramic Skip C165 C223 680 pF ceramic C221 220 pF ceramic C222 270 pF ceramic C225 75 pF ceramic C215 001 xF 1000 pF ceramic C213 33 pF ceramic Solder the leads to the foil and cut off the ex cess lead lengths all capacitors ...

Page 23: ...f each part to the foil as you install it and cut off any excess lead lengths L101 3 jxH coil 40 2076 Match the pins on the coil with their corresponding circuit il down tight fit one way The L103 44 jjlH coil 40 2075 SkipLl05 When you install the next two coils be sure to match the tab on the coil with the outline of the tab on the circuit board TAB v v V V V L107 14 p F coil violet 40 1785 Skip ...

Page 24: ...17 801 Install parts in Section 6 of the circuit board as fol lows Solder the leads of each part to the foil as you install it and cut off any excess lead lengths Q108 2N5770 transistor 417 293 Q109 2N5770 transistor 417 293 L135 3 jxH coil 40 2070 Q112 MPF105 transistor 417 169 Refer to Pictorial 1 5 Illustration Booklet Page 6 for the following steps Install parts in the circuit board as follows...

Page 25: ...nspect the foil side of the circuit board for the following most commonly made errors Unsoldered connections NOTE There are several unused holes in the circuit board Poor solder connections Solder bridges between foil patterns See Page 15 Protruding leads which could touch each other or the chassis when the circuit board is installed later Refer to the illustrations where parts where installed as ...

Page 26: ...solder along the re maining three seams in the shield Start the lugs on the shield into their corres ponding holes in the circuit board as shown in the Pictorial Then push the shield down and lugs to the foil Set the oscillator circuit board aside and proceed to T R Circuit Board Heathkif OSCILLATOR SHIELD v V 1 IN OSCILLATOR CIRCUIT BOARD PICTORIAL 1 6 SOLDER 4 INSIDE CORNER SEAMS OSCILLATOR SHIE...

Page 27: ...he parts are accounted for TAPED COMPONENTS NOTE These parts are taped on a strip which was checked before shipment Since these parts are taped in the order of assembly you may not wish to check them against the following list HEATH Part No QTY DESCRIPTION CIRCUIT Comp No RESISTORS NOTE The following resistors are rated at 1 4 watt and have a tolerance of 5 unless otherwise listed A 5 tolerance is...

Page 28: ...6 154 12 1 150 kft brn grn yel 6 564 1 2 1 560 kft grn blu yel 6 684 1 2 2 680 kft blu gry yel 6 105 12 2 1 Mft brn blk grn 6 155 12 3 1 5 Mft brn grn grn 6 515 1 5 1 Mft 1 2 watt grn R337 R334 R335 R336 R338 R347 R373 R41 4 R435 R436 R342 R429 R308 R303 R423 R425 R344 R369 R401 R402 R424 R408 R307 R331 R364 R404 R41 2 R433 R434 R437 R438 R441 R442 R443 R304 R316 R325 R416 R403 R343 R431 R439 R446...

Page 29: ... C326 C327 C328 C339 C341 C344 C345 C437 A2 21 1 64 1 0015M F 1500pF C438 A2 21 27 2 005 jiF 5000 pF C334 C335 A2 21 143 2 05 jiF C429 C431 A3 25 922 3 A3 25 923 1 A3 25 924 4 A3 25 912 2 A4 25 864 2 A3 25 880 2 A3 25 927 2 A3 25 91 1 A3 25 948 2 A3 25 942 1 A3 25 889 1 INDUCTORS B1 40 21 1 2 B2 40 2073 2 B1 40 2115 2 B2 40 2072 2 B1 40 21 1 2 B3 40 21 1 3 B2 40 2070 2 B4 40 21 1 1 B2 40 2069 2 B5...

Page 30: ...04 C4 442 71 5 1 CA3130IC U302 C4 442 602 1 LM324N IC U304 C4 442 55 1 MC1349P IC U301 C5 442 96 1 MC1496G IC U303 C6 442 681 1 78L08 IC U402 C4 442 734 1 LM388N 3 IC U306 KEY HEATH No Part No QTY DESCRIPTION CIRCUIT Comp No HARDWARE D1 D2 D3 250 1412 252 2 254 9 2 4 40 x 3 8 screw 2 4 40 nut 2 4 lockwasher MISCELLANEOUS E1 6 220 1 E2 E2 E3 E4 E5 E6 E7 E8 E9 E9 E10 E11 E12 E13 E14 E15 E16 1 0 222 ...

Page 31: ...Install components in Section 3 of the circuit board as follows R334 1 000 ft brn blk red resistor R428 680 ft blu gry brn resistor R429 1500 ft brn grn red resistor R418 2 7 ft red viol gold resistor ns as C432 01 jxF 103 glass ceramic capacitor C426 01 lF 103 glass ceramic capacitor R414 1000 ft brn blk red resistor C433 01 jxF 103 glass ceramic capacitor C579 01 lF 103 glass ceramic capacitor S...

Page 32: ...l resistor C322 01 jjlF 103 glass ceramic capacitor R316 6800 ft blu gry red resistor R372 470 ft yel viol brn resistor Ins as all components in Section 8 of the circuit board ollows R371 22 kft red red org resistor Solder the leads to the foil and cut off the ex cess lead lengths R338 1000 ft brn blk red resistor R336 1000 ft brn blk red resistor R335 1000 ft brn blk red resistor R337 820 ft gry ...

Page 33: ...omponents in Section 3 of the circuit board as follows R419 330 ft org org brn resistor C425 01 jxF 103 glass ceramic capacitor R402 3300 ft org org red resistor as follows ns Ins as R404 4700 ft yel viol red resistor Solder the leads to the foil and cut off the ex cess lead lengths all components in Section 4 of the circuit board C569 1 u F 104 glass ceramic capacitor R417 680 ft blu gry brn resi...

Page 34: ... 244 diode red yel yel 56 646 D301 BA 244 diode red yel yel 56 646 C302 01 n F 103 glass ceramic capacitor R301 100 ft brn blk brn resistor Solder the leads to the foil and cut off the ex cess lead lengths as follows C349 01 iF 103 glass ceramic capacitor R367 150 kft brn grn yel resistor D312 1N4149 diode 56 56 R365 100 kft brn blk yel resistor R366 100 kft brn blk yel resistor R349 27 kft red vi...

Page 35: ...the circuit board as fol lows L428 100 jjlH brn blk brn 45 621 choke W417 1 1 8 violet solid wire L427 100 jxH brn blk brn 45 621 choke L426 10 pH brn blk blk 45 614 choke L419 100 pH brn blk brn 45 621 choke W411 1 3 8 violet solid wire Skip W408 and W407 W406 1 1 2 violet solid wire SkipW405 W404 1 1 2 violet solid wire Solder the leads to the foil and cut off the ex cess lead lengths Install pa...

Page 36: ...emove any that you find as described below If you suspect that you have a solder bridge but are not positive you can check your foil pattern against the one shown in the corresponding X Ray View Illustration Booklet Page 37 To remove a solder bridge hold the circuit board component side up as shown and hold your solder ing iron tip between the two points that are bridged The solder will flow down ...

Page 37: ...istor with the double line on the circuit board Start the transistor leads into their corresponding circuit board holes and push the transistor down until the wider part of the leads touch the circuit board Then solder the leads to the foil and cut off any excess lead lengths BARE Mn METAL OYx SIDE DOUBLE LINE Q403 MPSA55 transistor 417 865 Be sure to match the flat on the transistor with the flat...

Page 38: ...ex cess lead lengths all capacitors in Section 3 of the circuit board ollows as Skip C421 and C418 C415 5 pF ceramic C417 110 pF 111 ceramic Skip C412and C414 C408 6 8 pF ceramic C411 150 pF 151 ceramic Form the leads of this capacitor to fit the circuit board holes Skip C405 and C407 C402 12 pF ceramic C404 180 pF 181 ceramic Skip C423 C422 C420 and C419 C416 110 pF 111 ceramic Skip C413 C409 150...

Page 39: ... C326 001 jxF 1000 pF ceramic Solder the leads to the foil and cut off the ex cess lead lengths Install capacitors in Section 7 of the circuit board as follows C328 001 jxF 1000 pF ceramic C327 001 p F 1000 pF ceramic C313 001 jjlF 1000 pF ceramic C312 10 pF ceramic C324 100 pF mica Solder the leads to the foil and cut off the ex cess lead lengths Refer to Pictorial 2 6 Illustration Booklet Page 1...

Page 40: ...112 L431 3 xH toroid coil 40 2112 Install two 5 16 x 5 16 ferrite beads on a 1 1 2 large bare wire at FB FB Use pliers to bend the wire to fit the circuit board holes Skip L406 L404 3 uH coil 40 2070 L402 13 coil 40 2069 Skip L405 L403 3 fxH coil 40 2070 SkipT401 L401 13 jjlH coil 40 2069 Install parts in Section 3 of the circuit board as fol ows U401 Double balanced mixer 150 72 Be sure pin 1 mar...

Page 41: ... wire around the web through both holes of the ferrite core 7 Refer to Part C of the Detail and finish wrapping the 6 wraps of violet wire 5 wires at the bottom and 6 wires at the top on the ferrite core When you com plete the 6 wraps there should not be enough violet wire left to make another complete wrap 8 Refer again to Part C of the Detail and remove all but 1 8 of insulation from the end of ...

Page 42: ... positive lead in the positive marked hole or the negative lead in the negative marked hole NEGATIVE MARK POSITIVE WO MARK C436 10 xF 35 V electrolytic capacitor Be sure to observe the correct polarity NOTE Electrolytic capacitors are identified on the circuit board by the following outline POLARITY MARKING OUTLINE OWS ns cui all parts in Section 2 of the circuit board as fol R333 2000 2 k I contr...

Page 43: ...prepared wires in the circuit board as fol lows Be sure to position each wire as shown in the Pictorial 5 from hole A to hole A 3 from hole B to hole B 1 3 4 from hole L to hole L Be sure to route this wire under the leads coming from R431 and D409 as shown 1 7 8 from hole D to hole D 3 1 2 from hole C to hole C 6 3 4 from hole E to hole E Be sure to route this wire under the lead coming from D409...

Page 44: ...talled in its socket When you bend the leads of a protected IC hold the IC in one hand and place your other hand on your work surface be fore you touch the IC to your work surface This will equalize the static electricity between the work surface and the IC an an so they do not line up with the holes in the IC socket DO NOT try to install an IC without first bending the pins as described below To ...

Page 45: ...CK OUT THE INNER LEAD Connect the free end of the 2 3 4 shielded cable to the circuit board as follows Inner lead to hole RF near U401 Shield wires to nearby hole GND Connect one end of the 8 1 2 shielded cable to the circuit board as follows Inner lead to hole SIDE TONE IN Shield wires to nearby hole GND Connect the free end of the 8 1 2 shielded cable to the circuit board as follows REMOVE THE I...

Page 46: ...g holes in the circuit board Detail 2 9B SW404 Refer to Detail 2 9B and install a rota ry switch at SW404 on the circuit board Posi tion the switch so the side with the color dot is positioned as shown in the Pictorial Be sure all of the pins are in their circuit board holes Then solder one of the center pins to the foil Again make sure the switch is tight against and perpendicular to the circuit ...

Page 47: ... the circuit board Then solder the two tabs on each shield to the foil Refer again to Detail 2 9E and use the follow ing procedure to install the PA shield on the circuit board 1 Position the PA shield as shown in the Pictorial note the location of the small hole in the shield Then make sure the tabs on the top of this shield enter the slots in the band switch shields Also make sure the tab on the...

Page 48: ...tegrated circuits for the proper type and in stallation Diodes for the proper type and installation Electrolytic capacitors for the correct position of the positive or negative leads This completes the assembly of the T R circuit board Set the circuit board aside and proceed to Chassis NOTE If you have the HWA 9 Band Pack Accessory check each of the parts supplied with that kit against the Parts L...

Page 49: ...ARE NOTE The following resistors are rated at 1 4 watt and have a tolerance of 5 A 5 tolerance is indicated by a fourth color band of gold A1 A1 A2 A2 A3 A4 A5 A6 A7 A8 6 470 1 2 6 102 12 10 1212 10 1211 19 756 21 761 26 1 68 60 26 63 1410 407 765 1 1 1 1 1 2 1 1 1 1 47 ft yel viol blk resistor 1 000 ft brn blk red resistor 1000 1 k n control 1 0 kH control 1 0 kft control with switch 01 lF 103 gl...

Page 50: ...CB connector F4 432 196 1 2 pin socket shell F5 432 866 6 Spring connector includes one extra F6 432 907 1 2 pin plug shell F7 432 970 1 5 pin socket shell CIRCUIT Comp No KEY HEATH No Part No QTY DESCRIPTION CIRCUIT Comp No Connectors Cont d F8 434 42 2 Phono socket F9 436 4 1 Phone jack F10 436 5 1 Coaxial jack SHEET METAL PARTS G1 90 566 3 2 Cabinet shell G2 200 1 441 Main chassis G3 200 1442 S...

Page 51: ...slot in the chassis Then use a control nut to secure the drive assembly to the chassis Only tighten this nut finger tight at this time 4 5 6 7 8 Loosely mount the capacitor to the VFO chassis with three 6 32 X 1 8 screws Tighten these screws finger tight Then tighten the two setscrews in the drive as sembly Start a 6 32 x 1 8 setscrew into the VFO shaft Then push the shaft onto the shaft of the dr...

Page 52: ...rial 3 2 Illustration Booklet Page 20 for the following steps Position the main chassis as shown in the Pic torial Refer to the inset drawing on the Pictorial and press chassis nuts into both of the square holes in either side of the main chassis Similarly press chassis nuts into both of the square holes in the other side of the main chas Similarly mount 4 40 x 3 8 flat head screws on the front of...

Page 53: ...own Push the VFO shaft set aside earlier all the way onto the shaft of the vernier drive assem bly Then tighten the setscrew Refer to Detail 3 2C and use the following pro cedure to set the dial stop 1 Loosen the two setscrews in the vernier drive bushing 2 Use your fingers to rotate the smaller gear brass on the variable capacitor until the indicated end of the rotor is be tween the indicated hol...

Page 54: ...Page 54 Heathkif EDGE PICTORIAL 3 3 ...

Page 55: ...and use of the lockwashers Use 6 32 x 1 2 hardware to mount a 1 8 spacer to the subchassis at CA as shown Only tighten the hardware finger tight at this time Similarly mount 1 8 spacers to the subchassis at CB CC CD and CE Tighten the hardware finger tight Refer to Detail 3 3A and temporarily position the T R circuit board onto the subchassis hard ware Hold the circuit board in place while you tig...

Page 56: ...PICTORIAL 3 4 ...

Page 57: ... 6 32 x 1 3 8 hardware to the subchassis at CP and CR Tighten the hard ware finger tight Refer to Detail 3 4A and temporarily position the oscillator circuit board onto the subchassis hardware Hold the circuit board in place while you tighten the hardware at CF CG CH CJ CK CL CN CP and CR Then remove the circuit board and set it aside NOTE If you could not tighten the hardware at one or more of th...

Page 58: ...is at FF FG FH and FJ R2 Refer to Detail 3 5A and mount the 1000 1 k il control 10 1212 to the chassis at R2 as shown Use a control solder lug a con trol flat washer and a control nut Be sure to position the solder lug and the control as shown before you tighten the hardware Rl Refer to Detail 3 5B and mount the 10 kfl control 10 1211 to the chassis at Rl as shown Use a thick control lockwasher a ...

Page 59: ...s at each end Then melt a small amount of solder on these ends to hold the strands together Prepare a 7 large red stranded wire Then con nect and solder one end of the wire to circuit board hole 12V IN Cut off any excess wire end Prepare the following shielded cables They are listed in the order in which you will use them NOTE To prepare these cables use the same procedure that you used when you p...

Page 60: ...he brown and red wires as a pair from the rest of the wires for a length of 9 Then shorten these wires by 8 Now separate the brown and red wires from each other for a length of 1 Save the cut off 2 wire cable for use later NOTE This end of the cable will be referred to as endB Connect the wires at end A of the 8 wire cable to the T R circuit board as follows Solder each wire to the foil as you con...

Page 61: ...he subchassis Be careful not to pinch any wires be tween the circuit board and the subchas sis 4 Use five 6 32 nuts to secure the circuit board to the screws 5 Slide the 7 shaft back into the rotary switches Make sure the flat on one side of the shaft is positioned as shown in the Pictorial 6 Turn the 7 shaft three positions clock wise Then pull the shaft back out of ro tary switch SW404 7 Start a...

Page 62: ...ontrol R3 lug 3 NS to the nearby solder lug S l Connect a 1 bare wire between control Rl lugs 1 S 2 and 2 S l Connect a 1 bare wire from control R2 lug 1 NS to the nearby solder lug S l Connect one end of the 8 large red wire to switch SW2 lug 1 S l The other end of this wire will be connected later C3 Cut both leads of a 01 xF 103 glass ce ramic capacitor to 1 2 Then connect the capacitor between...

Page 63: ...e cable will be referred to as endB Page 63 Position the cable as shown in the Pictorial Then refer to the inset drawing on the Pictorial and con nect the wires at end A the end with the short brown wire to switch SWl as follows NOTE Some of the following switch lugs are hard to get to You may find it easier to turn the chassis over to make some connections Brown wire to lug 1 S l Red wire to lug ...

Page 64: ... in the next three steps This will insure a good ground 4 Refer to Detail 3 10A and mount the coaxial jack onto the outside of the rear panel at J4 Use 4 40 x 3 8 hardware CHASSIS J3 Mount a phono socket onto the inside of the rear panel at J3 Use 6 32 x 1 4 hardware Be sure to position the socket as shown J2 Mount the phone jack onto the inside of the rear panel at J2 Use a thick control lock was...

Page 65: ...e Connect the free end of this wire to socket J3 lug2 NS R4 Cut both leads of a 47 H yel viol blk resis tor to 5 8 Then connect the resistor between jack J2 lugs 1 NS and 3 NS Position the resistor as shown in the Pictorial Be sure the leads of this resistor do not touch anything other than the lugs to which they are con nected Prepare a 4 shielded cable Then connect one end of the cable to socket...

Page 66: ...Refer to Detail 3 12C and mount two 6 solder lugs to the front of the chassis at RC Use a 6 32 x 1 4 screw and a 6 32 nut Be sure to position each solder lug as shown in the Picto rial before you tighten the hardware Similarly mount two 6 solder lugs to the front of the chassis at RD Be sure to position the solder lugs as shown in the Pictorial before you tighten the hardware Route the cable label...

Page 67: ...ount the VFO shield onto the VFO chassis 1 Refer to Part A of the Detail and slide the VFO shield onto the VFO chassis Make sure all the edges of the shield are on the outside of the VFO chassis Also make sure the shielded cable coming from the variable capacitor extends through the indicated slot in the VFO shield 2 Turn the chassis assembly over so the T R circuit board is up Then refer to Part ...

Page 68: ...ring connectors on the wires into the holes of the socket shell as follows Be sure to push on each wire until it locks into place Yellow wire into hole 1 Orange wire into hole 2 Brown wire into hole 3 Green wire into hole 4 Red wire into hole 5 Push the 5 pin socket onto oscillator circuit board plug P101 Be sure the yellow wire is at 12V as shown in the Pictorial Connect the free end of the shiel...

Page 69: ...oscillator circuit board into the chassis so the nine screws extending from the subchassis pass through the nine correspond ing holes in the circuit board Then use nine 6 32 nuts to secure the circuit board in place Refer to Detail 3 14B and use the following procedure to mount the BFO shield onto the oscillator circuit board 1 Position the shield as shown in Part A of the Detail Then melt a bead ...

Page 70: ...wn 2 Draw a pencil line across the center of the front panel 3 Carefully peel the backing paper strips from the dial window Then position the window so the line on it lines up with the pencil line on the front panel Also be sure the edge of the window is flush with the edge of the front panel Then press the window into place Carefully inspect the lugs of the meter for a fine shorting wire that may...

Page 71: ...he setscrew Turn the shaft of the AF GAIN control fully counterclockwise until it clicks if this has not already been done Then install a small knob on the shaft of this control Be sure the knob pointer lines up with the line at OFF on the front panel before you tighten the setscrew Turn the shaft of the BAND switch fully coun terclockwise Then install a small knob on the shaft of this switch Be s...

Page 72: ...E This wire will be referred to as the test lead during the Initial Tests Solder an alligator clip onto the other end of the prepared wire as shown in the Pictorial NOTE This wire will be referred to as the meter test lead during the Initial Tests Before you can perform the Alignment you may have to install a connector on the ends of your power supply leads if this has not already been done Refer ...

Page 73: ... help determine if there are any wiring errors solder bridges or other problems in your Transceiver Perform all of the tests before you connect your Transceiver to a power source Set the front panel controls and switches as follows BAND switch 80 SELECTIVITY WIDE Set your ohmmeter to the R x 100 range and connect its common lead to the Transceiver chassis CW LEVEL fully counterclockwise RIT center...

Page 74: ...AUSE 80 R107 350 to 700 A 9 voltline U402 40 R109 350 to 700 B Bandswitch wiring 30 Rill 350 to 700 C Short in corresponding mixer filter L101 L117 20 R113 350 to 700 D P101 wiring 17 R115 350 to 700 15 R117 350 to 700 12 R119 350 to 700 10 R121 350 to 700 Return the BAND switch to 80 before you make the following tests TEST POINT OHMMETER READING POSSIBLE CAUSE Point E wire socket 300 to 700 A 9 ...

Page 75: ...104 300 to 600 300 to 700 300 to 700 300 to 800 300 to 700 infinite A Short on 12 V line T R board A Short on R12 line B P101 wired wrong A T12 line B CW LEVEL control wiring A T R board B U301 T302 A CW LEVEL control wiring B T12 line from C R board A Shorted cable at OSC or BFO IN Turn the Transceiver over as shown in Picto rial 4 2 Illustration Booklet Page 33 and set your ohmmeter to the R x 1...

Page 76: ...osition A Shorted cable Wide out cable inner lead 8kft tol5kH A Shorted cable Set the SELECTIVITY switch to NARROW B Selectivity switch wiring Narrow out cable inner lead 8ka tol5kO A Switch wiring or cable Set your ohrnmeter to R x 100 Case of Q424 Tx In cable inner lead 300 to 500 300 to 500 A Soldering or Q424 A Cable shorted or open B Oscillator board L137 shorted or open This completes the In...

Page 77: ... fol lows CW LEVEL fully counterclockwise RIT center detent position AF GAIN fully counterclockwise OFF BAND switch 80 TUNING DIAL 250 KHz Refer to Pictorial 5 2 Illustration Booklet Page 34 and set the T R circuit board controls as follows as viewed from the front of the Transceiver METER ZERO R333 12 o clock position MUTE DELAY R445 3 o clock position SIDETONE LEVEL R368 3 o clock position AGC S...

Page 78: ...ree end of the test lead wire to TP103 near HFO Level control R173 NOTES 1 When you adjust the coils in the following steps be careful not to exert any downward pressure on the slugs Also do not turn the slugs more than two turns clockwise Too much pressure or turning the slug too far clockwise could dislodge the slug from the coil 2 Adjustments must be made in the following sequence for proper al...

Page 79: ...ly counterclockwise and the RIT control is in the detent at the center of rotation Then note the voltage indication on your meter Key the transmitter by shorting the KEY input on the rear panel or by holding down a regular key connected to the KEY input Adjust TRANSMIT RETURN control R131 until the transmit voltage equals the voltage you observed in the receive mode Then dis connect your meter Thi...

Page 80: ...djust the next band NOTE The two readings on each band may or may not be the same Coils L101 through L106 will peak when the slugs are approximately 1 16 down from the top of the coil form Coils L107 through L117 will peak with their slugs approximately 1 8 down Preset these slugs in the following manner before you begin the filter alignment Insert the alignment tool into the slug of the coil and ...

Page 81: ... on the rear panel Push the PCB connector on one end of the meter test lead with the alligator clip on the other end onto the pin marked Meter on the oscillator board Then connect the alligator clip to the positive lead of your VTVM or DVM Connect your meter s common or negative lead to the chassis and set the meter to mea sure 15 volts DC Push the PCB connector on one end of the test lead onto th...

Page 82: ... 80 L401 L402 40 L403 L404 30 L405 L406 20 L407 L408 17 L409 L411 NOTE For access to the 15 meter band coils you must remove the shaft from the BAND switch To do this Refer to Detail 5 4A and perform the follow ing steps Turn the Transceiver off Turn the BAND switch to 15 and loosen the setscrew in the collar on the bandswitch shaft Carefully slide the shaft part way out through the front panel an...

Page 83: ...ollar against the wafer and tighten the setscrew Turn the Transceiver on 12 L415 L414 Repeat 10 L417 L416 Repeat Disconnect the test leads from the Transceiver This completes the bandpass alignment Proceed to BFO Filter adjustment BFO FILTER ADJUSTMENT Set the BAND switch to 80 and the CW LEVEL control to the center of its rotation Key the transmitter and adjust the CW LEVEL control until you obta...

Page 84: ...Page 84 PICTORIAL 6 1 ...

Page 85: ...ess a thick foot onto the bottom cabinet shell near the remaining front corner Similarly press thin feet onto the bottom cabinet shell near the two rear corners Carefully peel the backing paper from the blue and white label Then press the label onto the bottom cabinet shell in the area shown Be sure to refer to these numbers in any com munications you may have with the Heath Company about your kit...

Page 86: ...re and con nect it securely to a grounded water pipe or other earth ground If you use a water pipe be sure there are no plastic pipes or connectors between the Transceiver and the earth MUTE DELAY This control is accessible through a hole in the rear panel and allows you to set the delay between the time you release the CW key and the receiver un mutes ANTENNA SIDETONE LEVEL This Transceiver will ...

Page 87: ...emale connector pin on the end of each as shown in the Detail Position the 2 pin plug shell with its point as shown then insert the pin on the end of the black wire into the hole at the pointed end The pin is properly seated when it snaps into the shell Similarly insert the pin of the red wire into the other hole Twist the wires to form a 2 conductor cable Then remove sufficient insulation from th...

Page 88: ... in tuning out unwanted signals on either side of the desired frequency Set the SELECTIVITY switch to WIDE for now You can later change to NARROW to eliminate adjacent channel signals RIT This control allows you to tune your receiver to a frequency that is up to 1 kHz above or below the transmitter frequency Set the RIT control to its midposition detent TUNING DIAL Selects the receive and transmit...

Page 89: ...are soldered as described in the Soldering section of the Assembly Notes on Page 6 Be sure there are no solder bridges between circuit board foils Check to be sure all transistors and diodes are in their proper locations Make sure each lead is connected to the proper point Make sure each diode band is positioned above the band printed on the circuit board 4 5 6 7 8 Check electrolytic capacitors to...

Page 90: ...ver if one is not available you can use an ohmmeter to determine the general condition of any one of the bipolar transistors in this kit The ohmmeter you use must have at least 1 volt DC at the probe tips to exceed the threshold of the diode junctions in the transistor you are test ing Most vacuum tube voltmeters meet this require ment To check a transistor with an ohmmeter proceed as follows same...

Page 91: ... of some troubles you might encounter If a particular part is mentioned Q103 for example as and or wired correctly Also check for solder bridge and poor connections in the surrounding area It is also possible on rare occasions for a part to be a possible cause check that part and other compo faulty and require replacement nents connected to it to see that they are installed CONDITION POSSIBLE CAUS...

Page 92: ...ctly wired or shorted D403 D404 D407 AGC R329 misadjusted Q107 Q301 General Transmitter Problems Low or no RF output on all bands receive and sidetone okay I 1 CW Level control wiring 2 Low or no TX Out from BFO see BFO Problems 3 D401 D402 L421 4 Q401 through Q406 No RF output or sidetone receive okay 1 Q408 2 No T1 2 volt supply 3 Wiring at Key jack or T R board 4 Broken lead in key cable Transm...

Page 93: ...ircuit Misaligned oscillator tank circuit VFO Problems No VFO output 1 2 3 4 Q102 Q105 Q106 L1 1 8 installed incorrectly Wrong values C1 82 through C1 87 VFO C1 not connected to hole E or shorted to shield BFO Problems No BFO signal at TP1 04 1 2 Q112 Q113 D142 No TX out signal okay at TP104 1 Q114 Q115 2 D143 3 CW Level control miswired 4 No T1 2 volts on CW Level control Improper or no transmit ...

Page 94: ...t Mixer Filter Problems No signal output at INJ OUT 1 Shorted cable to INJ OUT 2 Q101 3 D1 01 through D1 17 No signal one band 1 Improper alignment 2 Defective filter 3 Solder bridge on coil 4 Diode in defective band ...

Page 95: ...Tuning Rate Approximately 40 kHz per knob revolution Frequency Coverage 3 5 MHz 3 75 MHz 7 0 MHz 7 25 MHz 10 0 MHz 10 25 MHz 14 0 MHz 14 25 MHz 18 0 MHz 18 25 MHz 21 0 MHz 21 25 MHz 24 750 MHz 25 0 MHz 28 0 MHz 28 25 MHz Frequency Stability Less than 150 Hz per hour after 30 minute warmup Power Requirement 11 16 VDC at 1 ampere 12 6 V specified WARC bands are part of the Model HWA 9 Accessory ...

Page 96: ...9 Accessory Band Pack Dimensions 4 1 4 H X 9 1 4 W x 8 1 2 D 10 8 x 23 5 x 21 6 cm Weight 4 7 lbs 2 1 kg RECEIVER Sensitivity Less than 5 jxV for 10 dB S N N Less than 2 xV for readable signal Selectivity CW Audio Filter Narrow 250 Hz maximum at 6 dB Wide 1 kHz maximum at 6 dB Passband Center Frequency 700 Hz approximate Audio Output 1 watt into 8 ohm load Dynamic Range 85 dB measured in the Narro...

Page 97: ... Protected against high SWR Harmonic Radiation 35 dB minimum at rated output Spurious Radiation 40 dB minimum at rated output T R Operation CW Full break in CW Sidetone 700 Hz approximate to speaker or headphones Output level internally adjustable The Heath Company reserves the right to discon tinue products and to change specifications at any time without incurring any obligation to incorporate n...

Page 98: ...t detector An AGC automatic gain control voltage is produced at this point to keep the 2nd IF amplifier operating linearly The product detector converts the 8 83 MHz IF sig nal to audio frequencies which then pass through either a wide or a narrow audio active filter An audio frequency amplifier then amplifies this fil tered signal so it can drive an 8 ohm speaker or a set of headphones TRANSMITTE...

Page 99: ...on is selected by Band switch SW1 The HFO signals for 80 40 30 and 20 meters are produced by Q108 and its associated circuitry Q109 and its associated components pro duce the HFO signals for 17 15 12 and 10 meters The signal from either HFO transistor is coupled to the base of HFO emitter follower QUI The HFO signal is then coupled through C175 to gate 2 G2 of 1st mixer Q107 1ST MIXER Q107 produce...

Page 100: ...ow pass filter in use for that band The resulting filtered signal is then applied to antenna jack J4 In receive the signals received by the antenna are coupled through the proper low pass filter and C443 A R voltage is applied to the anode of D404 and D407 which allow the signal to pass through matching transformer T404 and continue through the selected bandpass filter thus taking the same path bu...

Page 101: ...en the CW key is depressed Q411 and Q412 in the receiver mute delay circuit are activated in the same manner When the key is depressed the base of Q408 goes low This causes it to conduct thus establishing a 12 volt output for the T request lines At the same time Q407 conducts and turns off Q409 C574 through C5 77 provide the proper timing of these lines as they are turned on and off RECEIVER MUTIN...

Page 102: ... D112 D113 D121 D122 D123 D124 D127 D128 D132 D133 D143 D301 D302 D409 D118 CIRCUIT COMPONENT NUMBER HEATH PART NUMBER MAYBE REPLACED WITH D307 D308 D309 D31 1 56 20 1 N295A D119 56 24 1N458 56 26 56 55 56 56 56 646 57 27 57 65 IDENTIFICATION 1N191 1 N4753A 1N4149 BA 244 1 N2071 1 N4002 IMPORTANT THE BANDED END Of DIODES ON BE MARKED IN A NUMBER OF WAYS BANDED END CATHODE ...

Page 103: ...Q112 Q301 Q302 Q401 0402 Q407 Q412 Q106 Q1 01 01 08 Q1 09 0111 Q103 Q104 0113 Q114 Q115 Q303 Q411 Q408 Q409 Q107 41 7 863 HEATH I PART NUMBER MAYBE REPLACED WITH IDENTIFICATION 417 169 MPF105 y I D S G b G MFE131 G1 G2 Q404 41 7 205 2N3866 Q405 Q406 417 912 MRF237 B B ...

Page 104: ...Page 1 04 Heathkif INTEGRATED CIRCUITS ICS CIRCUIT COMPONENT NUMBER HEATH PART NUMBER U303 442 96 MAY BE REPLACED WITH ...

Page 105: ...Heathkif Page 105 CIRCUIT COMPONENT NUMBER HEATH PART NUMBER U306 442 763 MAYBE REPLACED WITH IDENTIFICATION TOP VIEW ...

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Page 142: ...mber in the Circuit Com ponent Number column of the correspond ing Parts List A Find the circuit component number R5 C3 etc on the X Ray View C Adjacent to the circuit component number you will find the PART NUMBER and DE SCRIPTION which must be supplied when you order a replacement part CIRCUIT BOARD X RAY VIEWS ...

Page 143: ...3 0 ...

Page 144: ...SCILLATOR CIRCUIT 300 399 PA TS r M c OUNTE o D IN THE RECEI VER SECTION OF THE 400 499 FiC MT ti oA RD TRANSMITTER SECTION OF THE 3 ALL THIS SYMBOL INDICATES A POSITIVE DC VOLTAGE MEASURED cItcktT MPEDAN E VOLTMETER FROM THE POW WDI C ATE D TO CHASS S GROUND RECEIVE MODE NO SIGNAL TnPUT Io S T YMB0L ND CAT ES A POSITIVE DC VOLTAGE MEASURED OM THE POINT INDICATED TO CHASSIS GROUND TRANSNHT 6 THIS ...

Page 145: ...42 AS R337 R33B tOOO T C32e D3n 320 I 12V A C336W 01 R347 10 OO a c Jft HC334 005 C335 005 U304B 442 602 C332 01 R342 1200 5 R352 680K C347 t 2 2UF R346 VA 56 20 NARROW AUDIO FILTER C34I too VW R3S4 15M C345 1000 R359 L5M 3 3K R353 13K D301 0302 T12 56 646 56 646 L302 45 621 0303 66 66 TX IN SECOND MIXER R303 2200 L303 45 621 a R332 eao TO R4 2 R3I4 27 Q302 417 169 o S R322 Ml RJ31 4 7C0 METER RED...

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