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Summary of Contents for 707

Page 1: ...www SteamPoweredRadio Com JI f J 1 II _ I r I ASSEMBLY INSTRUCTIONS BAUER AM BROADCAST TRANSMITTER MODEL 707 zt 1 t I I 4 l l I 4 ...

Page 2: ...www SteamPoweredRadio Com ASSE1 1BLY INSTRUCTIONS BAUER AM BROADCAST TRANSMITTER MODEL 707 Bauer Electronics Corporation 1663 Industrial Road San Carlos California ...

Page 3: ... return i here Jf prepaid to the Bauer plant High voltage t ansfonners modulation transformers and reactors and f i lter chokes carry an extended warranty with 50 of the replacement cost being allowed should failure occur during the sec end y ear Warranty will be based on date of invoice Jo J etux n shipments will be accepted without prior authori zation Electron tubes and silicon rectifiers bear ...

Page 4: ...is book available The assembly of the kit is logically sub divided into ten sections These are as follows 1 Location and identification of all parts 2 Pre assembly of component boards 3 Installation of 3maller parts in cabinet 4 Installation of wiring harness 5 Pre assembly of IN rectifier and power control panels 6 Installation of h V rectifiers power control panels and HV harness 7 Installation ...

Page 5: ...gainst the packing list sup plied in each box The resistors should be arranged in order of resistance value for convenient location as required Shortages should be reported to the Bauer Electronics Corporation In the event any components have suffered either visible or hidden shipping damage a full report and claim should be filed immediately with the transportation company Page 2 ...

Page 6: ...to terminal 4 Jumper terminal 5 to terminal 6 Jumper terminal 7 to terminal 8 Jumper terminal 12 to terminal 13 Jumper terminal 9 to terminal 11 insulate Jumper terminal 14 to terminal 16 insulate Jumper terminal 10 to terminal 15 insulat 9 Mount R54 220k 2w between terminal 2 and terminal 10 v 10 11 II 12 13 14 V 15 116 1 17 92363 Mount R52 68k 2w between terminal 3 and terminal 11 Mount RSl 68k ...

Page 7: ...is used Al l component boards are mounted on standoffs when ins t a lled in the t ransmitter thus insuri ng suffi cient clearance f or all wir ing on t he back of the board 2 3 4 5 6 7 8 CB I 0 0 LL 0 0 IJ X X X CX 2 N D D D D N N N t N 0 J r0 lO lO tO lO t tO 0 a a a a a a 0 q r0 0 0 9 10 11 12 13 14 15 16 Figure CB 1 Page 4 ...

Page 8: ...om terminal 2 through ground lug to terminal 6 Mount R44 6 8k 2w 5 between terminal 1 and terminal Mount R47 82k 2w between terminal 2 and terminal 7 Mount R48 82K 2w between terminal 3 and terminal 8 Mount R45 2 2k 2w b tween terminal 4 and terminal 9 M ount R43 6 8k 2w 5 between terminal 5 and terminal Solder terminals 2 6 10 and lug on rear Remove screw that temporarily held the ground lug The ...

Page 9: ...te Jumper from terminal 12 to terminal 11 to pin 1 insulate Jumper from terminal l to terminal 2 to pin 6 insulate Temporarily attach ground lug to mounting hole nearest terminal 3 using screw and nut Jumper from ground lug to terminal 3 to pin 4 Mount R40 power and terminal 5 determining part between terminal 1 Mount R39 power and terminal 6 determining part between terminal 2 Mount Rl3 power and...

Page 10: ... and CB 12 13 are wrapped around the terminals Solder carefully and then cut off the excess lead 1 8 ihch from the termihal this pigtail facilitates replacement should it ever become necessary After soldering run a resistance check on each component board checking each diode from terminal to terminal Each diode should have a forward resistance of less than 20 ohms and a reverse resistance of more ...

Page 11: ...o pin 3 of the relay insulate Note that the relay carries designations of L 1 6 R 1 6 and 1 4 Refer to Figure CB 4 when making these connections keeping in mind that the drawing is a view and dotted lines indicate wiring on the back oftne component board Jumper from the C 43 ground lug closest to the relay spcket through pin L 3 to pin 4 o f the relay socket insulate Jumper from the lower C 43 gro...

Page 12: ...www SteamPoweredRadio Com _R _ _ 6 6 5 5 4 3 4 3 2 2 I I I I I I I L J L 2 4 3 I b o 2 3 FIGURE CB 4 92363 Page 9 ...

Page 13: ...unt the rectifier package as shown on the drawing below Clip the rectifier leads to al length and insert into the spring loaded clips observing carefully the markings on the rectifier a Mount R 25 1 k 5 w between terminal 3 and terminal 9 Mount R 26 S k 5 2 between terminal l and terminal 8 9 10 Mount R 28 6k 5 w between terminal 5 and terminal 10 n Solder all terminals and the ground lug 12 Remov...

Page 14: ...www SteamPoweredRadio Com PAGE 11 DELETED ...

Page 15: ...d nut Jumper from terminal 5 to the ground lug attached in the step above Mount red multiplier resistor R30 5 megohms 5 w 1 between terminal 3 and terminal 4 Mount red multiplier resistor R37 4 megohms 5 w 1 between terminal 6 and terminal 8 Mount R38 10 k 2 w between terminal 5 and terminal 6 Solder terminals 3 4 5 6 8 and ground lug on rear Remove screw that temporarily held ground lug The pre a...

Page 16: ...minal 6 to terminal 7 Jumper terminal 8 to terminal 9 Mount R22 5 k 10 w between terminal 1 and terminal 5 Mount R24 50 k 10 w between terminal 2 and terminal Mount R23 25 k 10 w between terminal 3 and terminal Mount R29 10 k 10 w between terminal 4 and terminal On front of pan el jumper from terminal 5 to closest terminal of C28 insulate Solder terminals 1 2 5 7 C28 and ground lug on real of pane...

Page 17: ...terminal J Noting the figure carefully solder the 8 capacitors 0022 uf between terminals CC E FF G H H I J J D Use the lower portion of the terminal barrel Install the 16 100k lw resistors Stagger as shown on Figure CB 8 Use the top of the terminal barrel to mount the resistors After the resistors are mounted solder each terminal on the bottom of the board carefully Turning the board over install ...

Page 18: ...www SteamPoweredRadio Com w u u FIGURE CB 8 ...

Page 19: ...3 0 lli vy 1s 16 t 21 7 92363 Haunt L4 2 4 mh RF cho e between terminal 2 and terminal 9 Mount Cl4 500 rmnfd 3 kv between ter111inal 3 and terminal 10 Mount Rll 3000 ohm 5 w between terminal 4 and terminal 11 Mount ClO 0022 mf 3 kv between terminal 5 and terminal 12 Mount Rl4 15 k 5 w between terminal and terminal 13 Mount Cll 0022 mf 3 v betwaen tcminal 7 an l cerminal 14 On front side of board s...

Page 20: ...pin 6 to terminal 5 Jumper from pin 1 to terminal 6 Jumper from terminal 4 through pin 2 to terminal 7 insulate Jumper terminal 3 to terminal 8 insulate Mount RlS 20 k 20 w between terminal 1 and terminal 3 Mount R60 4 7 k 2 w bet een terminal 2 and terminal 4 Mount R 99 100 k 2 w between terminal 9 and terminal 10 Solder terminals 1 2 3 and 4 On back side solder all octal socket connections The p...

Page 21: ...www SteamPoweredRadio Com PAGES 18 and 19 DELETED ...

Page 22: ... above step for each of the component boards CB 2 CB 3 CB 4 CB 5 CB 6 CB 7 CB 8 CB 9 and CB 10 2 3 additional 6 32 kep nuts will be used in this process On those boards where a ground lug is used make certain it is properly seated on the mounting screws Install the octal socket for V 3 using two 6 32 x 3 8 PH painted screws two 6 32 x hex nuts and two 6 shakeproof washers Note from the installatio...

Page 23: ...TC LS 26 sing four 6 32 x 3 8 PH painted screws Note that terminals 1 and 2 are on the down side Install S 2 ST 52 K Note the printing on the side of the switch and mount so that 11 on 1 is up The washer with the ear can be discarded However the lock washer should be used between the inside nut and the back of the panel Adjust the nut on the front of the panel so that it is flush with the switch m...

Page 24: ...ape the paint from around the screw so that the ground lug supplied attached to the resistor will make a good contact with the panel Slip on the lug first and follow with a 6 32 kep nut Tighten securely with the lug facing the left when viewed from the rear Next slip on a 6 extruded fiber washer follo the resistor The resistor terminal should point down Finally slip on another 6 extruded fiber was...

Page 25: ...oes Mount C 41 300 mf 150 v using the middle screw of T 4 installed in step 35 above to hold the capacitor and the bottom screw for the ground terminal The 1 i plastic cable clamp supplied should be slipped on to a point approximately one inch from the positive end of the capacitor The capacitor then should be mounted with the plus end up The clamp and the ground lug then mount on top of the kep n...

Page 26: ...The wood screws supplied with the friction catch are not used and can be discarded The male portion of the friction catch mounts on the panel using the plated screws Two are located just below T 5 with the remaining two located to the left and right respectively of the fuse block Mount the female portion of the catch on the breaker cover using the painted screws and kep nuts Make certain that the ...

Page 27: ...ding L 5 so that the terminals point toward the V 9 tube socket airf low Install S 12 the swi tch assembly using the parts supplied This switch a precut vane type mounts within the tube compartment The hole center rear 411 above tube shelf feeds the vane with the switch mounted vane up using two 6 32 x 3 8 1 BH screws and kep nuts When properly mounted the top of the vane should be in line with th...

Page 28: ...hrough the grommet previously installed in the upper right corner when viewed from the rear These wires should be pulled through to the front of the panel Further routing of these wires will come later V 4 Clamp the harness to the left of wire 84 using a 3 8 plastic cable clamp anchoring the clamp with a 6 32 x 3 8 PH painted screw and a 6 32 kep nut Use the tapped hole in front of V 6 1 5 Install...

Page 29: ...as to be made you will have plenty of lead length Start from the top and work down following the steps listed below carefully Run wires 14 and 150 through the grormnet on the bottom of the tube compartment and solder to the contacts of S 12 Airflow switch Solder wires 53 and 54 to the contacts of S 9 Connect the PA filament bypass capacitors C 16 C 17 C 18 and C 19 to the ground lug previously ins...

Page 30: ...www SteamPoweredRadio Com g 0 w 0 00 0 co ro l V OJ Close up rear view Bouer Type 707 broadcast transmitter cover removed from oscillator ...

Page 31: ...is manner is perfectly satisfactory With the 12 bus bar wire supplied connect the grid parasitic suppressors SU 1 and SU 3 Ohmite P 300 as shown in the drawing on the next page Solder carefully Solder the assembly completed in Step 28 to the grid pins of V 8 and V 9 The completed assembly will bans approximately 3 411 below the tube sockets Using a 311 length of 1tl8 wire connect terminal 3 on CB ...

Page 32: ...www SteamPoweredRadio Com L5 i V9 GRID VBGR D 4 L l P300 P 00 I r FINAL GRID PARAS TlC SUPPRESSOR ASSEMBLY 92363 Page 30 ...

Page 33: ...th Solder carefully Solder wire 138 to terminal 13 on CB 1 Connect wire 81 to terminal 12 on CB 1 Solder wire 137 to teL1ninal 10 on CB 1 Connect wire 1f 12L to the bottom lug of R 46 Solder wire 125 to the center lug of R 46 Solder wire 11123 to the top lug of R 46 Connect wire 1 88 and wire 1 137 to the top terminal of C 31 when viewed from the rear C 31 is the capacitor closest to the panel Sol...

Page 34: ...22 to terminal 7 of CB 2 Solder wire 144 to terminal 8 on CB 2 Solder wire 126 to terminal 9 on CB 2 Solder wire 145 to pin 7 of V 4 Solder wire 146 to pin 2 of V 4 Solder wire 143 to pin 6 of V 4 Solder wire 142 to pin 4 of v 4 Solder wire 123 to pin 5 of V 4 with a jumper from pin 5 to pin 3 Solder wire 122 to the bottom terminal of C 37 Solder R 41 33k 5 between terminals 7 and 9 on T 6 Form R ...

Page 35: ...on CB 3 Solder wire 1fa135 to terminal 8 on CB 3 Solder wire 1133 to terminal 9 on CB 3 Solder wire 1 34 to terminal 10 on CB 3 Solder wire 4195 to terminal 12 on CB 3 Solder wire 1fa135 to terminal 1 on T 6 Solder wire 1 136 to terminal 2 on T 6 Solder wires 30 and 31 to the top terminals of S 6 Jumper the two top terminals of S 6 together Solder wires 34 35 and 40 to the bottom terminals of s 6 ...

Page 36: ...terminal on K 1 Connect wire 8 and 9 to the center right terminal coil of K l Connect wire 150 17 and 18 to the bottom right terminal of K 1 Connect wire 102 and the short length of 18 wire supplied attached to R 16 to the left terminal screw type of K 8 Solder tlie two wires together before inserting irtto the K 8 terminal Solder a 411 length of fFlB wire on the outside terminal of R 16 farthest ...

Page 37: ... 34 c 4 s 136 141 142 21164 82864 Connect the ground wire from R 59 to the left tenninal screw type of K 9 Solder a 4 length of 1118 wire on the outside terminal of R 59 farthest from the panel Connect wire 120 and the short length just soldered to R 59 in the step above to the right terminal screw type of K 9 Connect wire 48 to the top control contact tenninal on K 9 Solder wire 49 to the lower c...

Page 38: ...Using the m0unting stud 0f C 29 as a ground point bolt on the lug and solder the frGe end to the right hand terminal of C 29 Use a 10 32 kep nut note C 29 may be supplied with pillar tenninals If so terminai lugs blue will be supplied with it as it will be necessaz y to lug the wires connected to this capacitor Steps 151 and 150 Solder wires 1177 f 7G and 1J 80 to the left terminal of C 29 Solder ...

Page 39: ...www SteamPoweredRadio Com MOTOR CON7ROLL D RHEOSTAT 92363 Page 37 ...

Page 40: ...hedule below There should be jumpers between terminals 2 and 4 and tennina_ls 1 and 3 Nonnally these are supplied with the transformer If not make them from a length of 18 wire and two insulated terminals blue Where more than one wire mounts on a terminal the t erminals should be mounted back to back then a second 10 32 hex nut us d and another pair of terminals installed Tighten carefully and adj...

Page 41: ...clearance between terminals Wire to Terminal 119 If 6 i K 115 117 II 7 116 118 H 5 i 165 v 166 cv5 67 t 168 69 i 110 V 171 v 172 173 174 21164 11 22 24 II 4 23 25 33 II 3 36 65 11 1 Solder wire tl85 to terminal 1 on CB 5 Solder wire 149 to terminal 4 on CB 5 Solder the other end of wire 149 to the top terminal of C 30 Since this is such a short piece of wire be certain that you use the end physica...

Page 42: ... z78 Solder wires 50 and 51 to the bottom control contact terminal of K 10 Solder wire 81 to termi nal 6 on CB 7 48Q Solder wire 83 to terminal 8 on CB 7 Solder wire 84 to terminal 9 on CB 7 Connect wire 68 to terminal 4 on CB 8 o Connect wires 75 and 1176 to terminal 3 on CB 8 484 Connect wire 67 to terminal 2 on CB 8 185 511 length of 6 plastic tubing supplied hort pi eces approximately 1 long o...

Page 43: ... TB 1 2 4 ij W2 _ 60 104 SB 7 a _ ll i 7 2 v 1 56 57 it 3 4 2 4D 39 65 II ii t ll II 5 n 6 11 12 13 i 14 l 5 17 18 l 20 i i n 1 II Vi slip the plastic tubing back down so that it covers the terminal at over each wire the point where the soldered connection was made 186A Solder Wire 1116 to the body terminal of F5 186B Solder Wire 153 to the end terminal of F5 186C Solder Wire 11 to the body termin...

Page 44: ...l he t nut to secure the cable clamp Connect Wire 90 RG 17fi coax to the frequency monitor jack Prepare the coax properly by pulling the center of the coax through the braid soldering the braid to the ground lug And the center of the coax to the terminal pin of the jack Connect Wire 110 RG 174 coax to the modulation monitor jack Prepare the coax properly by pulling the enter of the coax through th...

Page 45: ...k switch 202 Cut two 4 inch lengths of the 10 wire supplied Using the minimarkers supplied designate one as 3 and one 7as I Tfi e marlters should be placed approximately l inches from each end of the wire Install insulated terminal lugs yellow on these wires 203 l J4 205 1 206 v 207 i Jt19 210 92363 Cut one 10 inch length of 10 wire Designate as 128 Cut one 66 inch length of 10 wire Designate as 1...

Page 46: ...of K 10 Using the lacing cord supplied carefully tie Wire 128 in with the left trunk of the harness Tie Wire 129 and 130 in with the right trunk of the harness Route Wires 129 and 130 These two wires will go to the left along the cabinet base and then turn and run along the side to the left rear of the cabinet Using five 3 8 plastic cable clamps and five 6 32 x 3 8 PH screws clamp these wires usin...

Page 47: ...up of wires to the left of V 6 Carefully work the spiral wrap right up to the grommet At the point where the spiral wrap ends lace the cable care fully This section of the harness will be routed up the front left hand corner of the cabinet Wires 119 and 120 should come out the first meter hole mod current Wires 99 and 100 will come out the second meter hole Wires 102 and 103 will come out the thir...

Page 48: ... final plate voltage 0 5 kv Using the same procedure as above connect Wire 100 to the right plus terminal and Wire 99 to the left negative terminal Mount the meter with the hardware provided Unpack M 3 final plate current 0 1 amp and using the same procedure as above connect Wire 102 to the right plus terminal and Wire 103 to the left negative terminal Mount the meter with the hardware provided Ei...

Page 49: ...nsulator square type to support R 31 Use 32 x BH screw and a ffl0 shakeproof washer Mo_µnt R 31 1000 ohms 25 w using a 10 32 x 2 11 RH crew two 10 extruded fiber washers and two 10 metal washers on the stand off insulator mounted in Step 4 above Orient the terminals toward C 32 Mount 111 pillar insulators at Points Band C using 8 32 x 5 811 BH screws Use a 8 shakeproof washer under each screw Usin...

Page 50: ...s at Points A B C and D using 8 32 x BH screws Use a 8 shakeproof washer under each screw Mount V 1 cone insulators at Points E and F using 8 32 x 5 8 BH screws and 8 shakeproof washers Mount R 66 and R 67 250 k 50 w using 6 32 x 5 8 PH screws and 6 32 kep nuts Run the screw from the back of the board and secure with a kep nut then install the resistor and secure with a second kep nut Such a pro c...

Page 51: ...t the other end of il 67 to tbe bus bar running between Band D using a short length of 18 wi e Solder botb ends carefully Jurnper the normally closed contacts of K 4 as shown on the drawing using a 3 length of if HJ wire with insulated teL ninals blue on eci ch end Connect the upper right contact of K 4 to the bus bar running between Band D Note the drawing Using a short length of 13 wire for this...

Page 52: ...lder carefully at both ends Mount R 75 150 ohm 25 w using the hardware provided 10 32 x 2 3 4 RH screw two 10 extruded washers 10 metal washer 10 32 kep nut Do not overtighten Mount with resistor terminals facing toward left Mount K 11 Advance AM 2 C 115 VA using the hardware provided 6 32 x 1 2 PH screw 116 shakeproof washer and 1 2 threaded stand off Mount with majority of relay terminals facing...

Page 53: ...p end of R 36 S Mount C 46 6 mfd 2000 v on the hat section located between the HV boards Use the footed brackets supplied with the capacitor securing them with four 10 32 x 5 811 PH screws Use 10 shakeproof washers under each screw Do not install the top right hand screw yet 6 Cut an 8 length of 1118 wire and install an insulated terminal lug blue at each end Connect this jumper from the top right...

Page 54: ... standoff insulators at Points E and F Note the drawing Using a 3 8 plastic cable clamp and a 6 32 x 3 8 BH screw clamp the harness at a point to the left of R 67 Using a 11 plastic cable clamp and a 6 32 x 3 8 BH screw clamp the harness at a point to the left of C 46 on the hat section Using a plastic cable clamp and a 6 32 x 3 8 BH screw clamp the harness at a point to the left of CB 12 This cla...

Page 55: ...n plastic cable clamps secure w re 1f153 Use the two screws on the tube shelf to the rear and left of L 5 O ie will be at the rea 0 the h0 i ontal portion o the tube compartment the other will be the first screw l n_ t 1e vertical portion of the tube conroa tment Note the picture titled Fi nal P F Section to see how this is done The installation of the HV harness is as c0mplete as neceasary for th...

Page 56: ...in he tube compartment using a S 32 x 3 8 BH screw 92363 Install al pillar standoff insulator at Point C Use a fS 32 x 3 8 BH screw Install the four Ohmspun resistance grids R 62 R 63 R 64 R 65 Mount as shown on the drawing using sixteen 8 32 x 3 8 PH self tapping screws Install four insulated terminal lugs blue on the leads as shown When using wire of this type double the wire within the lug barr...

Page 57: ...T c 1 1 t i l l I TO GR NO G RIOJ_ R 62 t GR Q R G3 I B 32 J C 2 8 ST LG REQ o ljQ I Y GRID3 R G4_ eGRID4 RG S I y __ 1 ei Q I TERM INAL A TERM INAL B PART 250 1 2 7 TERM INAL C PART N 2 20 10 5 PART N2 250 12 6 PART NQ 22 0 102 NOTE INSUL ATOR SCRE WS G 32 N C 20 BH ...

Page 58: ...roof washers The name plate should be on the right hand side When mounting be careful of C 24 Mount L lS the modulation monitor pick up coil This coil is of a diameter that permits it to be fitted into the end of L 7 Note the picture on the p exb page Mount so that the terminals are on the right and easily accessible Loosen the tank coil and support and insert the pickup coil approximately When mo...

Page 59: ...www SteamPoweredRadio Com 0 N w w OQ 1 Jl I F NA L TANK PAUOER _ t HE _US ED I I I I L4A _ 0C24 D WIRE fi 153 e23 ti 0 15 D IT REAR VIEW _ FINI L RE SECTIO N CU D O L 01 MMY LINE ...

Page 60: ... 11 x4 11 Part 190 105 should be installed at this time The screw head is insi de the tube compartment follow with the split washer then the plate lead On the other end use a metal washer first and then the nut The cond washer and nut can be installed at the time the rasitic suppressor is connect ed unt the C 23 plate b1ocking capacitor assembly using the ardware provided Connect the two parasitic...

Page 61: ...www SteamPoweredRadio Com t 32 x PH t lhKEPROOF YT SHER 92363 5 321t P PA N1E D PANEL C22 TX t TERMlNA L6 I ll I L0 FINAL PLATE Rf CHOKE 8 32 PH PA N1ED B 32 PH B SHAKE PROOF WASHER Page 59 ...

Page 62: ...106A depends on frequency and type of tank coil from L 7 to L 8 Refer to the instruction book Figure A for the proper place L ment of the load tap At L 8 it is placed on the first turn nearest the panel Connect the assembly 200 107 from L 8 to C 26 Refer to 21164 the instruction book Figure 4 for the proper placement of the output t p on L 8 Count the turns carefully The coil clip already connecte...

Page 63: ... installed Wire 164 goes to V 6 right insulator facing the rear Wire 165 goes to V 7 left insulator facing the rear Use an additional 10 32 hex nut on each feedthrough bolt 37 Install a 5 16 plastic cable clamp to support wires 11164 and 165 using the tapped hole to the right of the feed through i nsulators Use a 6 32 x 3 8 BH painted screw and a 6 32 kep nut 38 92363 Using the mounting screw to t...

Page 64: ...ed ilhen mounted the propeller is closest to the filter Orient so that toe connecting block is at an approxi i nate 9 00 o clock position Using the terminals provided make the foll wing connections be sure to slip on the protecting cap first Wire 1117 to T 1 7 l t T 4 1 54 T 8 tire J o nire Ji to 17 155 154 3 Using the length of spiral wrap provided wrap Wires il7 1 155 and 1 154 from the blower n...

Page 65: ...REW Ll3 Oc33 NQ155 t f Ql59 I J2l62 N2158 f J21E I tJQ t56 N 2153 Tl LI 2 L V HARt J ESS Q 15 TO CB o N Q1 1 1 QI 55 I I I I GANO SCREW I I tJ2154 t I NQ154 Ql60 2156 t J2 154 4 5 I I TT I G I S 5 3 w NQ 29 f JQ 13 0 M O UNTING OF Hl H VOLT A E COMPONE TS ...

Page 66: ... of the cabinet and secure with the e 32 kep nut provided Attach the C 33 C 34 ground lead Part 4fa250 129 and secure with a second 8 32 kep nut Install filter capacitors C 33 and C 34 4 mfd 4 kv using the footed bracket supplied four 10 32x3 811 PH screws and fou 10 32 kcp nuts Install the bus bar assemblies Part 250 128 between the common terminals of C 33 and C 34 note the drawing At this time ...

Page 67: ...two terminals face tihe front of the transmitter Connect wires 156 and 153 to the left hand terminal when facing the front and wire 163 to the right hand terminal These connections should be made before bolting down the reactor Mount the constant voltage transformer T 2 Sola 23 22 150 Install a 3 411 grommet in the rear of the trans former Use the knock out that will be closest to the front panel ...

Page 68: ...at the other end Connect one end of this jumper yellow terminal to the top terminal of C 32 Connect wire 160 and the other end of the jumper from c 32 installed in Step 27 above to Point A on the HV board Include also the bus bar from point Bl Solder wire 166 to the bottom lug of R 31 Connect the modulation monitor lead 110 running up the corner near the power board to R 75 The braid of the coax s...

Page 69: ...ch corres ponds to the right hand socket the No 2 position to the left hand socket when viewed from the rear For one crystal operation use the right hand socket and the No 1 position of the crystal selector switch Use care when handling the crystal When extracting from the socket grasp the base not the glass envelope 10 Install the final grid underdrive relay K 2 Potter Brumfield KC_S 5000 ohm coi...

Page 70: ...chematic you will note that a 2 5 volt winding Terminals 11 and 12 and one half of a 5 volt winding Terminals 18 and 20 are used in series to provide the 6 volts necessary As the transformer manufacturer is not consistent in the phasing of the filament connections it is possible for these windings to be connected so that they oppose rather than add Make a point of checking this now Page 68 ...

Page 71: ...e Screen MA 220 260 RF Out Amps 2 25 500 Watts 0 Mod 4 5 10 12 14 18 14 16 34 38 130 290 315 2050 2150 320 360 3 18 1000 Watts 0 Mod 4 5 10 12 16 24 18 20 52 58 120 380 420 2900 3100 480 560 4 5 If the proper grid current cannot be obtained on the lower power reduce the size of R 13 on CB 3 A 4K and a 3K resistor Sw axial type are provided in the spares for this purpose Try the 4K resistor first A...

Page 72: ... the transmitter will not be a c nl table to the FCC So that we might schedule the checkout as o C 11 as possible complete the form below and return it to us e transmitter should be capable of normal operation in the dummy tcnna before a checkout is scheduled COMPLETION NOTICE The transmitter sold to has been Sr t a t i_o_n________ completed and is now ready for a final checkout by a factory repre...

Page 73: ...ransmitter checked on air _____on dummy _______ 6 What is the transmission line impedance ______Type____ 7 What type of frequency monitor is used 8 What type of modulation monitor is used 9 10 What is licensed antenna or common point resistance ______ ohms If transmitter was operated on the airH what was the antenna or common point current ______________RFA Transmitter efficiency________ 11 Indica...

Page 74: ...al Plate and Screen _____ ma RF Output _____amps at lOOOcps Performance Bauer Model 707 Serial 1 Frequency_____ Power 100 Mod ma ma ma ma ma ma volts ma _____amps Audio input level 1000 cps 100 mod db Noise db below 100 modulation Distortion measured at 95 modulation 50 cps 100 cps 400 cps 1000 cps 5000 cps 7500 cps Response in db variation from 1000 cps 95 modulation 30 CPS 50 cps 1oo cps 400 cps...

Page 75: ...ma ma ma _____ ma volts ma _____amps Performance Bauer Model 707 Serial f Frequency_____ Power ma ma ma _____ ma ma ma volts ma _____amps Audio input level 1000 cps 100 mod ___________db Noise db below 100 modulation Distortion measured at 95 modulation 50 cps 100 cps 400 cps 1000 cps 5000 cps 7500 cps Response in db variation from 1000 cps 95 modulation 30 cps 50 cps 100 cps 400 cps 1000 cps 3000...

Page 76: ...quipment does not depart more than 2 decibels from that at 1000 cycles between 100 and 5000 cycles 5 The carrier shift current at any percentage of modulation does not exceed 5 6 The carrier hum and extraneous noise exclusive of microphone and studio noises level unweighted r s s is at least 45 decibels below 100 modulation for the_ fr quency band of 30 to 20 000 cycles I certify that the Bauer Mo...

Page 77: ... sufficient thread contact and as a consequence the mounting would be potentially weak The choice of screw types is important there is a reason behind every one Care should be taken to follow the instructions care fully and use the hardware specified The types of screws used in the transmitter assembly are shown below Round Head RH Slotted Pan Head PH Phillips Binding Head BH Slotted Identifying a...

Page 78: ...ive a firmer bite and this is important where good positive contact to the panel is necessary to insure a positive ground In other situations shakeproof washers are used to provide a positive lock In all cases follow the instructions carefully and use all parts regardless of how small and insigni ficant they may seen to be Several different sizes of plastic cable clamps are used in the assembly of...

Page 79: ... 2 and 3 the ease with which every component can be reached All wiring is accomplished with just one harness which is sup plied with the kit properly laced and with each wire number coded All small components are mounted on well marked component boards such as Fig 4 Eleven of these insulated boards are used in various sections of the transmitter An illus trated assembly instruction book shows the ...

Page 80: ...g in parnllel as a phte modulated power amplifier A motor driven rheostat in the cathode cir cuit of the final stage controls out put power so as to compensate for variations in line vollagc The final tank circuit is unique in that tuning i accomplished through the use of a variable vacuum capacitor a top quality method not usually found in one kilowatt transmitters T he transmitter is designed to...

Page 81: ...ilh a own 11ightti111c puwcr and i 1 bonus for the kit builder who can pc1 for111 initial L11 llt llJl 1 I low 1 uwer The Control Circuits With Lhe use of c111i co11duC lor power supplies the Bauer control c ircuits were greatly simplified and au toma tic starti11g was provided Actually only one master start lup switch is nccPssary since the silicon power supplies require no warmuµ time High volta...

Page 82: ...te Control Facilities Complete Set of Operating Tubes Tool Kit CRYSTAL BUFFER GENERAL PERFORMANCE CHARACTERISTICS AND SPECIFICATIONS TYPE OF EMlSSIO A3 R TED POWER OUTPUT I000 500 250 watts POWER OUTPUT CAPABILITY 1I00watts R F OUTPUT IMPEDANCE 50 ohms unbalanced FREQUENCY RANGE 540 1600Kc FREQUENCY STABILITY 5 cps AUDIO INPUT LEVEL 100 mod l0 dbm FREQUE CY RESPO 1SE 0 95 mod 1000 500 250 wattS 50...

Page 83: ...4 Resistor 2 2k 2w R45 Resistors 82k 2w R47 R48 Package 3 Component board CB 3 Resistor 330 ohms 2w R39 Resistor 270 ohms 2w R40 Resistor Sk Sw ww 11 axial 1 Rl3 Octal Socket Relay Potter Brumfield Type KR PllA 115 v coil K 5 Package 4 Component board CB 4 Capacitor 150 mfd 150 v C43 10k 2w pot R61 Relay socket and cover K 3 Package 5 Component board CB 5 Resistor lk Sw ww naxial11 R 25 Resistor S...

Page 84: ...kage 9 Component board CB 9 Page 2 Resistor 3000 ohm 5 w R 11 Resistor 15k Sw ww axial R 14 Capacitor 0022 mfd 3 kv Cl0 Cll C12 Capacitor 500 mmfd 3 kv C 14 RF choke 2 4 mh L 4 Package 10 Component board CB 10 Resistor 20k 20w ww R 15 Resistor 4 7k 2w R 60 Resistor 100k 1 4 W R 99 Octal Socket Relay Potter Brumfield Type KCPS 5000 ohm coil K2 Package 11 Silicon diodes 1 spare Resistors 100k lw dio...

Page 85: ...inted 6 32 x 3 8n PH 6 32 x 3 8 1 PH painted brown 6 32 x 1 21 PH 6 32 x 3 411 PH painted 6 32 x l H BH 6 32 x V PH painted 6 32 X V 2 1 PH painted 6 32 x 1 l l PH 6 32 X 3 l BH 6 32 x 3 4 1 PH TEP Ifc vo oNGtl 6 32 x 7 SH PH Box 3 32 screws 8 32 x 5 811 BH 8 32 x S 811 PH painted 8 32 x 3 411 PH painted 8 32 x 3 8 1 BH 8 32 x 3 8 1 self tapping 8 32 x 1 2 BH 8 32 x 3 8 1 BH painted Box 4 9 32 nut...

Page 86: ...8 1 spacers for if6 screws Box 8 10 32 nuts 10 32 kep nuts 10 32 hex nuts Box 9 k 20 screws 1 L 20 x 3 4n HH l L 0 20 x 1 RH painted Box 10 k 20 nuts 1 LJ x 20 kep nuts Package 2 Octal sockets 3 5 Fuse holders Indicator Type Bussman HKL X 3 2 1 1 vv Paekage 3 _11 l I Capacitors 2 mfd 600 v bathtub F7 C 30 C 31 C 38 Ground leads for C 30 C 31 C 38 Package 4 Capacitor 1 mfd 600 v bathtub C 37 Ground...

Page 87: ...l er 43A l Q3 Bl 6 mh to 1 2 5 wmh SQ G k e t e 800 k c Miller L 3A474 CB1 205 mh to 580 mh 800 to 1300 kc Mi 11 er 43A224CB1 ls87trh to 187 mb 130 kc to 160 kc Package 9 tf 18 wire 6 plastic tubing Lacing cord 1 10 wire Spiral Wrap Package 10 3 8 plastic cable clamps 3 L plastic cable clamps 3 16t plastic cable clamps 1 2 plastic cable clamps 5 16 plastic cable clamps 5 ff plastic cable clamps Pa...

Page 88: ... BJ 1 1 10 32 kep nut 1 Resistor 40k 200 w R 35 1 µ Resistor _ 601c 25 36 including W 1 lG 32 x 2 j 4 RH screw 2 10 extruded fiber washers 1 10 metal washer 1 10 32 kep nut 2 Resistors 250k 50w R 66 R 67 2 Resistors 50 ohm Sw R 69 R 70 1 Resistor 50 ohm 25w adjustable R 75 including 1 10 32 x 2 3 4 RR screw 2 10 extruded fiber washers l 10 metal washer 1 2 1 1 1 IH0 32 kep nut Capacitor 1 mfd 5 kv...

Page 89: ...tached and including 1 6 32 x 3 RH painted screw 2 6 32 kep nuts 2 10 extruded fiber washers 1 6 metal washer Resistor 50 ohm 25w ww adjustable R 59 w wires and ground lug attached and including 1 6 32 x 3 1 RH painted screw 2 6 32 kep nuts 2 10 extruded fiber washers 1 6 metal washer Capacitor 10 mfd 600 v C 27 Capacitor 12 mfd 1 kv C 29 Filter chokes 15 h 85 ma L 11 L 18 Resistor 15 ohm 20 w ww ...

Page 90: ... to 1 4 coupling Package 4 3 4 i rubber grommet Lord shock mounts ground strap Package 5 Bus bar 1 250 126 Bus bar 1i250 127 Bus bar ff 250 128 Bus bar 11200 112 Ground wire 250 129 HV wire 250 131 HV wire 250 132 HV wire w insulated terminal lug on one end yellow HV wire w insulated terminal lug on one end yellow Connector assembly 200 101 Cennectot asLembly 200 0lA used only when padder capacito...

Page 91: ...C 26 Capacitor 001 mfd 12 5 kv C 23 including 2 20 x 1 RH painted screws 4 11 rubber gronnnets 2 12 metal washers 2 20 kep nuts 2 20 beJt nuts Capacitor 500 mm 20 kv C 22 including 1 TX 2 terminal 1 l 11 cone insulator 1 8 32 x 3 811 PH painted screw 1 8 32 x 3 811 PH screw 1 8 32 x 11 PH painted screw 1 8 sbakeproof washer 1 6 shakeproof washer 1 6 32 x 31811 PH screw Barut coil 50 tlb EFJ Type 2...

Page 92: ...assembl es including 1 l n feed thru insulator 1 10 32 x 2 RH screw l 10 split washer 1 10 metal washer l 10 32 hex nut 1 190 105 plate lead 1 HR6 plate connector Capacitor 1 mfd 4 kv w ground lead attached C 36 including 2 spade type brackets 4 10 32 kep nuts Capacitors 4 mfd 4 kv C 33 C 34 Capacitor 6 mfd 2 kv C 46 including 2 footed brackets k 10 32 x S 811 PH screws 4 10 shakeproof washers Rea...

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