Bauer 707 Instruction Book Download Page 1

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Summary of Contents for 707

Page 1: ...www SteamPoweredRadio Com lo I u e rELECT RONIC S CORPO RATIO N 1663 Industrial Road an Carlos California 591 9466 1 7 f r 8 fr f l r A l o ...

Page 2: ... L J t Li I _ L l t r 098 1165 01 AM BROADCAST TRANSMITTER MODEL 707 INSTRUCTION BOOK Electronic Corporation 5851 Florin Perkins Road 916 383 5353 Sacramento California 95828 A DIVISION OF COMPUTE auiPMENT CORPORATION I July 1970 ...

Page 3: ...NITIAL ADJUS1MENTS AND TUNING 8 MAINTENAi CE AND TROUBLESHOOTING 11 REMOTE CONTROL 11 GENERAL SERVICE INFORMATION 13 Safety Notice 13 Production Changes 13 Replacement Parts 13 Warranty 14 LIST OF TABLES Number Page 1 Summary of Mechanical and Electrical Specifications 1 2 Typical Transmitter Performance Data Bauer Model 707 15 3 Parts List 16 4 Tuning Chart Model 707 25 5 Power Determining Parts ...

Page 4: ... LIST OF ILLUSTRATIONS Model 707 AM Transmitter Pao e _ iv Functional Block Diagram 2 Latching Relay Unit Rust Model 108 4A 12 Front View of Bauer Model 707 Broadcast Transmitter 36 Rear View of Bauer Model 707 Broadcast Transmitter 37 Outline Drawing 38 Schematic Diagram 39 Page iii ...

Page 5: ...www SteamPoweredRadio Com I C r L i I Figure 1 Model 707 AM Transmitter 680215 2 Page iv ...

Page 6: ...250 watts 50 10 000 cps 30 12 000 cps Distortion 0 95 mod 1000 500 250 watts 50 10 000 cps Carrier Shift 1000 500 250 watts _ Noise Level below 100 mod FCC Efficiency Factor F Power Consumption for one kilowatt carrier power Average modulation 100 modulation Power Requirements 680215 2 A3 1000 500 250 watts llOO watts 50 ohms unbalanced 540 1600 kHz 5 cps 10 dbm 600 ohms 0 5 db 1 5 db 2 0 max less...

Page 7: ...t Temperature Range 20 to 110 F Altitude Range 0 8000 feet RF OUTPUT CRYSTAL BUFFER DRIVER POWER AMPLIFIER OSCILLATOR AMPLIFIER AM LIFIER 2 4 400A 6AG7 6AG7 6CA7 1 AUDIO I AUDIO MODULATOR BUILT IN NPUT AMPLIFIER 2 4 400A DUMMY 2 6SJ7 ANTENNA LOW VOLTAGE BIAS HIGH VOLTAGE RECTIFIER RECTIFIER RECTIFIER SOL I D STATE SOLID STATE SOL ID STATE Figure 2 Functional Block Diagram 680215 2 Page 2 ...

Page 8: ...cuit of V3 controls the gain of the driver stage and determines the amount of RF drive available at the grid of final power amplifiers V8 and V9 Plate and screen voltage on the final power amplifiers is varied by the modulator to produce amplitude modulated radio frequency output Plate choke L6 and capacitor C22 prevent RF power from feeding back into the modulator and power supply portions of the...

Page 9: ...ge to the four 4 400A tubes and screen voltage to the final RF stage For 500 watt operation series resistors are added to reduce the final plate and screen voltages For 250 watt operation increased efficiency is obtained by operating half of the high voltage rectifier independently of the normal bridge circuit to produce half voltage output for the final amplifier A second section of filter LlO C4...

Page 10: ...o indicate which circuit is involved The operation of any one of the three overload relays removes primary power which in turn eliminates the overload current and restores the overload relay to the normally closed position Repetitive re cycling of the overload relays and of contactor K7 is prevented in the event of a sustained overload by an overload lockout circuit consisting of latching relay K3...

Page 11: ...ed by meter M6 The references in the Federal Communications Commission Rules to final efficiency do not consider the screen power supplied to the final amplifier The net plate current should accordingly be used in any calculations of efficiency in comparison to the FCC efficiency factor F INSTALLATION INSTRUCTIONS Environment Install the transmitter in a well ventilated room which is reasonably fr...

Page 12: ...nal Connections To minimize transportation damage the heavier components are normally re oved from the transmitter prior to shipment Reinstall these as follows 1 Install modulation transformer T7 in the rear corner of the cabinet below C 32 Terminals l 2 and 3 should be toward the rear of the cabinet a Connect wire N_ o 164 to terminal No 1 b Connect wire No 155 to terminal No 2 c Connect wire No ...

Page 13: ...stall all tubes making sure that the skirts of the 4 400A tubes clear the chassis holes and seat firmly on the ceramic sockets Connect 4 400A plate caps 6 Install main crystal in the right hand socket as is viewed from the rear on the oscillator buffer chassis 7 Install auxiliary crystal used INITIAL ADJUSTMENTS A 1 JD TUNING Remove high voltage rectifiers CB12 and CB13 Set front panel switches as...

Page 14: ...ol R27 to set the modulator plate current at the value indicated for low power qperation in tab1e 2 If all meter readings are now in substantial agreement with the typical value9 the high low switch can be changed to high and all meter readings compared with those tabulated in table 2 for high power operation If the final plate voltage differs by more than 100 volts from the typical value correct ...

Page 15: ...tion select a different pairing of 6SJ7 audio amplifier tubes If no distortion meter is available set R46 at mid range The overload circuits should now be checked With the transmitter operating on high power detune the final until the final plate and screen current is 600 ma The plate overload should operate within one to two seconds If necessary readjust relay shunt Rl6 to get this condition Rest...

Page 16: ...and keep track of the hours a tube is used Use your experience to dictate tube replacement rather than wait for a tube failure and possible lost air time Because of its outstanding component accessibility the Model 707 is easy to maintain Use the servicing aids that are provided as a part of the transmitter Note the flags on the overload relays K 8 K 9 K 10 when trouble is being experienced Re che...

Page 17: ...K3 the plate off reset function is initiated This will break the connection between TBl 12 and 13 removing late voltage and simultaneously apply 220 volts AC to reset K3 It is important in all remote control systems to duplicate the functions of S3 and S4 as closely as possible When re setting the overload relay plate voltage must be automatically removed by the control system The reset voltage ap...

Page 18: ...to improve performance or meet component changes PriQ r to reprinting an addenda sheet will be provided in the front of this instruction book describing the changes and the necessary corrections for this book This information is provided as a ser vicing aid 3 nd should not be used to modify earlier equipments exc_ ept under specific instructions Replacement Parts The parts lis r contained in this ...

Page 19: ...ter chokes carry an extended warranty of 50 of the replacement cost being allowed should failure occur during the second year Electron tubes and silicon rectifiers bear only the warranty of the manufacturer thereof in effect at the time of shipment to Purchaser Accessories supplied by but not manufactured by SPARTA ELECTRONIC CORPORATION shall carry only such manufacturer s standard warranty and a...

Page 20: ...0 ma 18 20 ma 50 58 ma 24 29 ma 24 29 ma 34 38 ma 34 38 ma 50 58 ma 380 420 ma r 120 ma 190 210 ma 115 ma 290 315 ma llOma 1450 1550 V 2050 2150 V 1450 1550 V 2050 2150 V 2900 3100 V _ 2 900 3100 V 220 260 ma 220 260 ma 320 360 ma 320 360 ma 480 560 ma 480 560 ma 2 28 amps 2 78 amps 3 18 amps 3 25 amps 4 56 amps 5 56 amps TYI _ical Performance Audio input level 1000 cps 100 mod 10 dbm Noise 58 db ...

Page 21: ...1 ohms 1 2 w 5 Resistor 10 000 ohms 2 w 10 Resistor 1000 ohms 2 w 10 Resistor 3000 ohms 5 w wirewound Ohmite Axial Potentiometer 3000 ohms 4 w Cb rostat A 10 3000 Power determining part see table 5 Resistor 15 000 ohms 5 w wirewound Ohmite Axial Resistor 20 000 ohms 20 w wirewound Ohmite Brown Devil Resistor 50 ohms 25 w wirewound Ohmite 0366 adjustable Resistor 100 ohms 2 w 10 Rheostat 300 ohms 1...

Page 22: ... 1000 500 watt only see table 5 Resistor 40 000 ohms 200 w wirewound Resistor 60 000 ohms 25 w wirewound Resistor 4 megohms 5 w 1 Resistor 10 000 ohms 2 w 10 Power determining part see table 5 Resistor 33 000 ohms 1 2 w 5 Resistor 6800 ohms 2 w 5 Same as R6 Potentiometer 500 ohms 2w Resistor 82 000 ohms 2w 10 Resistor 68 000 ohms 2 w 10 Resistor 220 000 ohms 2 w 10 Same as R30 Resistor 3300 ohms 2...

Page 23: ... ohms 1 w 10 131 0153 Resistor 25 ohms 20 w wirewound s ame as R76 Same as R26 109 0025 101 1253 101 1251 110 1078 101 1252 ll0 0272 110 0264 110 0024 CAPACITORS Capacitor var 2 6 25 mmfd Capacitor 33 mm id 500 v Capacitor 500 mmfd 500 v Capacitor 01 mfd 600 v Capacitor 75 mmfd 500 v Same as CS Capacitor 500 mmfd 3 kv Capacitor 0022 mfd 3 kv Capacitor 02 rnfd 150 v Same as C9 Same as ClO Cl6 Cl7 1...

Page 24: ...ague 30DK TS Same as C22 Vacuum var cap 25 500 pf Jennings UCS 500 Frequency determinin part see table 4 Frequency determining part see table 4 Capacitor 10 mfd 600 v Sprague CP70E 1EF106K Capacitor 05 mfd 1 kv Sprague CP53B 1EG503K Capacitor 12 mfd 1 kv Sprague CP70E 1EG126K Capacitor 2 mfd 600 v Sprague CP53B 1EF205K Capacitor l mfd 5 kv CD TJH50001 Capacitor 4 mfd 4 kv CD TJH40040AJ Capacitor 0...

Page 25: ...86 1391 RFC 2 5 mh National R 50 L4 186 1401 RFC 2 4mh National R 100 LS Frequency determining part see table 4 L6 3 021 0042 RFC 1 5 mh Bauer Frequency determining part see table 4 L8 L9 186 1407 Inductor 19 µh Johnson 232 633 Ll0 Power determining part see I table 5 Lll 186 0902 Filter reactor 15 h 85 ma Chicago RS 1585 Ll2 317 0006 I Modulation reactor 65 h 500 ma Electro Engineering E9561B I L...

Page 26: ...o power change relay audio pad Potter Brunfield and final drive KRPllA 115 v K6 180 0392 Crystal selector Advance A J r 2C 115 va K7 180 0404 H V transformer primary breaker GE CR105K003 K8 K9 180 0396 Mod overload relay Heinemann CRl 617 XXA I Kl0 180 0406 H V transfor mer primary overload Heinemann relay CTl 617 XXA Kll Same as K6 SWITCHES Sl 296 0403 Switch master start Molex MRC 8Pl S2 299 001...

Page 27: ... MS 368 9112 Meier final gr d 0 50 ma r I M6 368 9113 Meter final screen grid 0 100 ma M7 368 9112 Meter driver plate 0 50 ma r M8 368 9112 Meter osc plate 0 50 ma M9 368 9114 Meter audio plate 0 10 ma TRANSFOR t VIERS Tl 326 9012 High voltage transformer 3560 v CT Electro Engineering 0 78 A 2 76 kva 11586 T2 326 9014 Voltage regulator 500 va Sola 23 22 150 60 cycle 326 9015 23 22 650 50 cycle T3 ...

Page 28: ... Description TUBES Vacuum tube type 6AG7 Vacuum tube type EL34 6CA7 Vacuum tube Type 6SJ7 Vacuum tube Type 4 400A SILICON RECTIFIERS Bias Assembly Silicon rectifier 600 v 750 ma HV rectifier assembly Same as D2 FUSES Fuse 1 6a 3 ag Slo blo Fuse 30A FRN 30 Fuse l l 2a 5 kv CRYSTALS Crystal vacuum TERMINAL BOARDS Terminal strip 20 position Terminal strip 7 position Manufacturer Gl W06 1N2071 IRC 67 ...

Page 29: ...C Xl X2 396 0049 Osc buffer dual turret socket Vector 10 00 18A3 2 XS 396 1005 Socket R F driver and audio I amplifiers bias rectifier Amphenol 77 MIP ST F X6 X7 396 0209 Socket modulators and finals Johnson 122 275 X8 X9 100 I Xl0 Xll 396 0210 Socket crystals Pomona XS 8 Xl2 Xl3 Xl4 396 1005 Socket relays K2 and K5 Amphenol 77 MIP 8T X15 396 1005 Same as X3 S12 396 0025 Socket 9 pin min Cµich 9JM...

Page 30: ... 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 c 7 J I l Table 4 Tuning_ Chart Mode l 707 Taps Used L 7 C23 L 7 C24 L 7 L8 L 8 C26 L 9 L 9 Load f Tap a Tap b Tap c Tap d Dummy e 8 8 3 18 13 19l 10 10 3 22 16 23 10 10 2 8 6 16 11 12 2 10 6 15 12 13 2 12 6 15 8 9 2 5 6 13 12 13 2 6 6 12 13 14 2 6 6 12 15 16 2 6 6 12 18 19 2 8 6 11 20 21 2 7 6 11 21 22 2 8 6 11 22 23 2 8 6 11I 2 2 2 9 6 11 lI...

Page 31: ...Sangamo 003 µf 6kv 2 P N 101 1204 Sangamo 002 µf 6kv 3 P N 101 1207 Sangamo 001 µf 6kv 4 P N 101 1214 Sangamo 005 µf 6kv NOTES a End turn is counted as No l b Position will depend on loading required move right decrease turns to righten coupling Move left increase turns to loosen coupling C23 C24 taps usually 1 turn apart set C23 tap for best efficiency c End turn on right side of L 7 counted as N...

Page 32: ...Axial 5 w wirewound C45 105 0401 Same as C35 C46 103 2003 Capacitor 1500 volt power supply filter CD TJL 20060 6 mfd 2 kv Ll0 317 0010 Reactor 1500 volt power supply filter UTC S 35 8 h 400 ma POWER DETERMINING PARTS 1000 500 WATTS Rl3 131 0750 Resistor driver cathode 3000 ohms Ohmite Axial 5 w wirewound R39 136 0528 Resistor audio input pad 150 ohms 2 w 10 R40 136 0538 Resistor audio input pad 39...

Page 33: ...wire heavy insulation 5 Kl Fl 6 S12 8 Kl 7 Fl TBl 8 8 S12 1 TBl 9 9 Sl2 l S 1 red 10 CBl0 9 S 1 white 11 12 TS 11 VS 2 6 3 ac 13 TS 18 or 20 VS 7 6 3 ac 14 S12 T2 Hl 16 wire 15 Kl T2 H4 16 wire 16 Kl FS I 17 Kl Blower 18 Kl F3 19 Kl F2 20 T2 Xl T4 4 16 wire 21 T2 X2 T4 l 16 wire 22 T4 3 T3 4 16 wire 23 T4 4 T3 3 16 wire 24 T3 4 F4 25 T3 3 S2 Alternate connection in some eq_uipment depends upon T 5...

Page 34: ...l 27 511 TS 1 28 F4 TS 2 29 F4 TBl 16 l 30 F4 S6 31 S6 S5 32 S5 S7 33 T3 3 CB3 9 34 S6 CB3 10 35 S6 K4 36 T3 l K4 37 T4 2 TB2 7 38 S7 TB2 6 39 S7 TBl 18 40 S6 TBl 17 41 T4 2 Power control motor common Term 2 42 S5 Power control motor lower Term l 43 ss TBl 14 44 S5 Power control motor raise Term 3 45 S5 TBl 15 46 F2 I CB4 5 47 F2 K8 48 K8 K9 680215 2 Page 29 ...

Page 35: ...7 52 S10 CBl0 5 53 S9 S10 54 CB4 3 S9 55 CBl0 6 K7 56 TBl 12 S3 57 TBl 13 S4 58 S4 CB4 2 59 S3 F3 60 TBl 7 Ground Ground at F6 F7 Mounting bolt 61 TBl 11 S3 62 S3 CB4 4 63 T5 15 V3 Pin 7 64 TS 17 V3 J in 2 65 Not used 66 R95 Kl 67 T5 3 CB8 2 68 TS 7 CB8 4 69 TS 5 118 70 C27 Ll8 71 C27 M8 Positive 72 M8 N gative TB2 l Osc plate 73 C27 CB9 6 74 C27 TB2 5 Buffer plate 75 CB8 3 Lll 680215 2 Page 30 ...

Page 36: ...e CB9 2 Driver plate 80 C29 CB7 3 81 CB7 6 CBl 12 Audio plate and screen 82 CB7 4 K7 83 CB7 8 K7 84 CB7 9 V6 screen 85 TS 8 CB5 l 86 TS 10 CBS 6 87 CBS 10 R27 88 R27 C31 89 CBS 9 R27 90 TB2 4 Jl RG 174 U coax 91 TB2 3 TS 15 92 TB2 2 TS 17 93 Buffer out V3 Pin 5 Buffer output to driver grid 94 Rl2 CB9 4 95 Rl2 CB3 12 96 LS MS negative 97 MS positive CBl0 7 98 CBl0 8 T4 6 99 T4 6 M2 negative 100 M2 ...

Page 37: ...al screens 107 M6 positive R35 R36 108 Not used 109 Not used llO Mod Mon Pickup J2 R6 174 U Coax coil 111 T4 7 V8 fil 12 thin wall 112 T4 5 V9 fil 12 thin wall 113 T4 5 V8 fil 12 thin wall 114 T4 7 V9 fil 12 thin wall 115 T3 7 V6 fil 12 thin wall 116 T3 5 V6 fil 12 thin wall 117 T3 7 V7 fil 12 thin wall 118 T3 5 V7 fil 12 thin wall 119 T3 6 Ml Positive 120 M1 Negative K9 121 CB2 3 C38 122 CB2 7 C3...

Page 38: ...28 K7 Kl0 10 HW 129 K7 Tl 10 HW 130 Kl0 Tl l0HW 131 CB6 5 TBl 5 132 CB6 5 T4 6 r 133 TBl 1 CB3 4 134 TBl 2 CB3 7 135 CB3 8 T6 1 136 CB3 5 T6 2 137 CBl 10 C31 138 CBl 13 CB2 3 139 CB2 l T6 8 140 CB2 5 T6 9 141 VS Pin 4 T6 7 142 V4 Pin 4 T6 10 143 V4 Pin 6 VS Pin 6 144 CB2 8 VS Pin 6 145 V4 Pin 7 VS Pin 7 146 V4 Pin 2 VS Pin 2 I 147 Not u_sed 148 Rl9 R20 149 CBS 4 C30 150 Kl S12 16 wire I 680215 2 P...

Page 39: ...From To Remarks 151 Not used 152 Not used 153 FS R68 154 C42 Blower 155 R68 Blower Non Numbered Jumper Wires Not in Harness C37 Ground C31 Ground C38 Ground K9 Ground R59 Ground R59 K9 R59 R59 Grounded terminal to tap T3 2 T3 4 16 wire T3 l T3 3 C30 Ground CB6 7 C36 C36 Ground C33 Ground Ll3 Ground T4 2 T4 4 T4 l T4 3 C29 Ground C27 Ground 680215 2 Page 34 ...

Page 40: ...ess Part 8 of 8 All are 18 wires in main harness except as noted Wire No From To Remarks R20 Ground Rl6 K8 2 wires from each end of Rl6 Rl6 Rl6 Terminal closest to panel to tap Kl Kl Start contact to coil Power control motor Connect common poles S3 S4 CBl0 9 Kl coil r 680215 2 ...

Page 41: ...R27 Modulator Bias rt I __ V8 V9 M6 M5 M7 V3 R12 Final Drive V2 Vl C l C2 Crystal Adiust T3 T4 K7 Under Cover 1 f lr Jl Frequency Monitor h 4 J2 Mod 1 Mool l __ ___ t TB 1 F6 F7 Under Cover Figure 4 Front View of Bauer Model 707 Broadcast Transmitter 680215 2 Page 36 ...

Page 42: ...www SteamPoweredRadio Com L I LJ L 0 n u I LJ I I 680215 2 Tl J d CB12 CB13 High Voltage Rectifier 1 T7 _ Ll2 Figure 5 Rear View of Bauer Model 707 Broadcast Transmitter Page 37 ...

Page 43: ... 1 li r J1 I I L _IOO _ _J SEENOTE I r O O R 67 7 I 25C I I t __ __ I I I I I u I I R66 1 I I L SEE NOTE 4 I I I r J I I I I I I I I I I C 46 WF T 2KY L IO 8H 400MA I CT I I I I I L ____ J NOTES I SA PI E OF ll uAUZATION PROVll f DON L V RECTIFIERS 2 H V RECTIFl R MAOf UP Of TWO Ft CAPSULATED SECTIONS 3 COMPONENtS SHOWN OR 00 500W MOOEL R I3 IS 4K 5W 4 COMPONENTS FOR I0001250W MODEL R I3 IS 5K 5W ...

Page 44: ... Ix 0 T4 0 CB X CB8 89 Ll8 0 LJ 0 0 0 0 tt1 oSI O O C7 9 TS D KIO X ci xi REAR JIEW FRONT PANEL INSTALLATION DIAGRAM x R4b D 0 C37 R27 0 0 VS V4 0 f52 u Qe RS 1 K LJ CB4 X UI I R20 o 8 Rl9 D C 30 D CB5 0 X Ix C B o xi 00 I I l I ...

Page 45: ...BRACKET 162 158 I I I K K4 Q _ Q R35 D __ __ 166 TO K 11 NO CONTACTS IE 35 IE 36 107 TO R35 107 R 75 SIDE VIEW L 10 R o t oiLf o _ NOTE TO GROUND USE SHAKEPROOF WASHERS UNDER ALL MOUNTING SCREWS C 32 Bauer ELECTl ON CS HIGH VOLTAGE RECTIFIER A ND POWER CONTROL ...

Page 46: ...sistor 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 5k Sw ww 11 axial 1 Rl3 Octal Socket Relay Potter Brumfield Type KRPllA 115 v coil K 5 Package 4 Component board CB 4 Capacitor 150 rnfd 150 v C43 10k 2w pot R61 Relay socket and cover K3 Package 5 Component board CB 5 Resistor lk 5w ww naxial11 R 25 Resistor Sk 5w ...

Page 47: ...mponent 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 lOOk 12 R 99 Octal Socket Relay Potter Brtnnfield Type KCPS 5000 ohm coil K2 Package 11 Silicon diodes 1 spare Resistors 100k lw diode equalizi...

Page 48: ... 6 32 X 3 8 PH 6 32 x 3 8i PH painted brown 6 32 x 1 21 PH 6 32 x 3 411 PH painted 6 32 x ln BH 6 32 x H 11 PH painted 6 32 x l i PH painted 6 32 x 1 L i PH 6 32 X 3 4 1 BH 6 32 x 3 4 i PH 6 32 x 7 811 PH _Bo_x 13 _ _ 8 __ _32_s_c_r_ew_s 8 32 x 5 811 BH 8 32 x 5 8a PH painted 8 32 x 3 4n PH painted 8 32 x 3 8 BH 8 32 x 3 8 1 self tapping 8 32 x 1 2 BH 8 32 x 3 8 i BH painted Box 4 9 32 nuts 8 32 h...

Page 49: ...x 7 Spacers _ 5 8li spacers for 1 6 screws Box 1 8 10 32 nuts 10 32 kep nuts 10 32 hex nuts Box 9 lz 1 20 screws 1 t 1 20 x 3 4n HH 1 z ri 20 x 1 RH painted Box 10 n zo nuts 1 411 x 20 kep nuts Package 2 L Octal sockets Fuse holders Indicator Type Bussman HKL X Paekage 3 Capacitors 2 mfd 600 v bathtub C 30 C 31 C 38 Ground leads for C 30 C 31 C 38 Package 4 Y Capacitor 1 mfd 600 v bathtub C 37 Gro...

Page 50: ...hed Miller 43A 103CB1 6 rub to 1 25 rah 5 00 ke eo 800 k Hi1J Br 43t 4 q CB1 205 n r l 800 to 1300 kc Miller 43A224CB1 138 mh to 187 mh 1300 kc to 1700 kc Package 9 1118 wire 6 plastic tubing Laci ng cord 1110 wire Spiral Wrap Package 10 f 3 8 plastic cable clamps 3 L plastic cable clamps 3 161 plastic cable clamps 1 2 plastic cable clamps 5 16 plastic cable clamps 5 8 plastic cable clamps Package...

Page 51: ...ashers 1 10 metal washer l 10 32 kep nut Resistor 40k 200 w R 35 Resistor 60k 25w R 36 including 1 l G 32 x 2 3 4 r RH screw 2 10 extruded fiber washers 1 10 metal washer l 10 32 kep nut Res stors 250k SOw R 66 R 67 Resistors 50 ohm Sw R 69 R 70 Resistor 50 ohm 25w adjustable R 75 including 1 10 32 x 2 3 4 i RH screw 2 10 extruded fiber washers l 10 metal washer 1 10 32 kep nut Capacitor 1 mfd 5 k...

Page 52: ... 16 w wires attached 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 311 RH painted screw 2 6 32 kep nuts 2 10 extruded fiber washers 1 6 metal washer Capacitor 10 mfd 6GO v C 27 Capacitor 12 mfd 1 kv C 29 Filter chokes 15 h 85 ma L 11 L 18 Resistor 1...

Page 53: ...C 24 Spinner knob 17411 to 1 4 coupling Package 4 3 4n rubber grommet Lord shock mounts ground strap Package 5 Bus bar 11250 126 Bus bar 250 127 Bus bar 11250 128 Bus bar 200 112 Ground wire 250 129 HV wire 4fo250 131 HV wire 250 132 HV wire w insulated te ninal lug on one end yellow HV wire w insulated terminal lug on one end yellow Connector assembly 200 101 2E GeAaeoter a s sembJ y 1 UOO iOff u...

Page 54: ...25 Capacitor mfd C 26 Capacitor 001 mfd 12 5 kv C 23 including 2 20 x l RH painted screws 4 rubber grommets 2 12 metal washers 2 20 kep nuts 2 t 20 he c nuts Capacitor 500 mm 20 kv C 22 including 1 TX 2 terminal 1 l cone insulator 1 8 32 x 3 8 PH painted screw 1 8 32 x 3 8 PH screw 1 8 32 x it PH painted screw 1 8 shakeproof washer 1 6 shakeproof washer 1 6 32 x 31811 PH screw Tank coil 50 uh EFJ ...

Page 55: ...hrough assembl es includin 1 l i feed thru insulator 1 10 32 x 2 11 RH screw 1 10 split washer 1 10 metal washer 1 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 4 10 32 x 5 8vr PH screws 4 _ 10 shakeproof ...

Page 56: ... 12A 1400 kc Above items missing from No 3846 shipment 1 Output feed through and lead assembly 1 Payment should bo mado from this invoice We do not mail monthly statomonts 2 Claims for adjustment must be made on receipt of merchandise Claims for goods damaged in transit shoutd be filed with carrier by consignee Merchondi se not returnable without our prior authorization 3 We hereby certify that th...

Page 57: ...ENT MODEL 707 AM TRANSMITTER 1000 500 250 WATT 0 0 0 0 AVAILABLE COMPLETELY ASSEMBLED OR IN KIT FORM BAUER ELECTRONICS CORPORATION 1661 Industrial Way San Carlos California U S A Telephone LYtell 3 0800 301 Clay St San Francisco 11 Ca ifornia CABLE FRASEN ...

Page 58: ...s a kit from the ground up and the result is a transmitter unsurpassed in accessib ii ity and simplification Much of the technical material in this brochure is taken from the actual type acceptance application submitted to the Federal Communications Commission Washington D C The 707 in fact was one of the first transmitters to be type accepted under the new and more exacting rules that went into e...

Page 59: ... 1000 500 250 watts 1100 watts 50 ohms unbalanced 540 1600 kc i 5 cps 10 dbm 0 5 db j 1 5 db 2 0 max Less than 3 60 db 57 db OPERATING CONDITIONS To insure that the transmitter hos ample power copobil ity for operation with 1 kw directional antenna systems with a reserve for possible transmission Iine losses between the transmitter and the common point all one kilowott measurements reported herein...

Page 60: ...00 10000 GRAPHS __ ___ _ _ N 30 100 MEASUREMENTS CF FREQUENCY RESPONSE 1100 WATTS Relative Response 25 Mod 50 Mod 85 Mod 95 Mod 0 4 db 0 4 db O 3 db O B db O 2 O 2 O 2 0 1 0 3 O 2 O 2 O 2 O 2 O 1 O 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 O 1 0 1 0 0 0 3 0 3 0 1 0 2 0 3 400 1000 3000 10 000 ...

Page 61: ... Modulating Frequency Relative Response 25 Mod 50 Mod 85 Mod 95 Mod 30 0 9 db 0 8 db 0 7 db 0 6 db 50 0 4 0 4 0 4 0 4 100 0 3 0 2 0 2 0 l 400 0 1 0 l 0 0 0 0 1 000 0 0 0 0 0 0 0 0 5000 0 2 0 l 0 1 0 1 7500 0 1 0 2 0 I 0 1 10000 0 I 0 4 0 3 0 2 GRAPHS 5 0 db 5 30 100 400 10 000 ...

Page 62: ... GRAPH 30 50 100 400 1000 5000 7500 0000 25 Mod 50 Mod 85 Mod 95 Moel 1 1db 1 5 db 1 3 db 1 4 db 0 5 0 6 0 5 0 6 0 2 0 2 0 2 0 2 o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 2 0 2 0 2 IJ l l l Illllllllllilllllllllll 11 1 1 i 1 1111111 1 11 1 1111 I l l I 11111111 30 100 400 1000 3000 10 000 ...

Page 63: ...c Distortion includes noise 25 Mod 50 Mod 85 Mod 95 Mod 50 cps 0 79 o 78 1 05 1 35 100 0 68 0 62 o 52 0 81 400 0 61 o 58 0 38 0 86 1000 0 56 0 54 o 36 0 88 5000 0 60 0 73 1 00 1 18 7500 o 76 1 20 1 38 1 42 10000 o n 1 20 1 25 1 40 GRAPHS 5 0 I1111111111 1111 IOOl l IIII I111 1 111111 1111 l o 30 100 400 1000 5000 10 000 ...

Page 64: ...S 30 MEASUREMENTS OF AUDIO FREQUENCY HARMCNIC DISTORTION 500 WATTS Harmonic Distortion includes noise 25 Mod 50 Mod 85 Mod 0 97 0 78 0 92 0 68 0 53 0 48 0 70 0 52 0 41 0 66 o 43 0 37 0 61 0 57 0 77 0 66 0 69 1 05 0 65 0 64 1 11 100 400 1000 95 Mod 5000 0 98 0 48 0 48 0 34 0 77 1 20 1 80 10 000 ...

Page 65: ...0000 MEASUREMENTS OF AUDIO FREQUENCY HARMONIC DISTORTION 250 WATTS Hormonic Distortion includes noise 25 Mod 50 Mod 85 Mod 95 Mod 0 90 0 70 0 76 0 84 0 71 0 51 0 46 o 50 o 68 0 43 o 37 0 38 0 67 0 38 0 34 0 34 0 72 0 48 0 61 0 63 0 80 o 56 0 58 0 58 0 84 0 55 o 51 0 88 100 400 1000 5000 10 000 ...

Page 66: ... provide o rejection of 53 db to frequencies 15 kc removed from center frequency BLOCK DIAGRAM DATA Audio Oscillator Frequency 1225 kc 1240 Carrier 1255 Transmitter Modulation Monitor 250 Watts Observed Relative Level Level 50 dbu 51 db 101 0 56 45 Dummy Load Attenuator 500 Watts Observed Relative Level Level 52 dbu 51 db 103 0 59 44 Field Intensity Meter 1100 Watts Observed Relative Level Level 5...

Page 67: ...d was essentially the some as at the fundamental frequency BLOCK DIAGRAM Audio Oscillator DATA Harmonic Frequency 1240 kc 2 2480 3 3720 4 4960 5 6200 6 7440 7 8680 8 9920 9 11 160 10 12 400 Transmitter Dummy Lood I Modulotion Monitor Attenuator Field Intensity Meter 250 Watts 500 Watts Coupling Measured Relative Measured Relative Correction Output Level Output Level 0 0 db 97 0 dbu 0 0 db 100 0 db...

Page 68: ...incipally from the cabinet control circuits power leads or audio leads The spectrum was investigated at oil frequencies up to the tenth harmonic of the carrier All observed signals having o strength which was measurable on the Stoddart Type NM 20A field intensity meter employing o shielded loop ore reported below Observations of the extent of spurious radiations were mode in several directions fro...

Page 69: ...4 1 db 24 1 dbu 117 ldb 24 1 dbu 120 1 db 3 30 9 107 3 34 3 106 9 37 7 106 5 4 26 4 111 8 30 6 110 6 34 8 109 4 5 23 5 114 1 25 8 115 4 28 0 116 2 6 28 4 109 8 28 4 112 8 28 4 115 8 7 19 l 119 1 22 I 119 1 25 1 119 1 8 35 6 101 6 38 4 102 8 41 2 103 0 9 16 8 121 4 16 8 124 4 16 8 127 4 10 15 l 123 1 15 1 126 1 15 1 129 I Spurious radia tion could not be detected at any frequency between 150 kc and...

Page 70: ...noise was measured relative to 100 modulation and found to be as fol lows Audio oscillator Modulation monitor Noise and distortion meter Field intensity meter Attenuator Dummy load SignaI generator Bridge Power Level Hum Noise 1100 watts 500 250 TEST EQUIPMENT Waveform General Radio General Radio Stoddart General Radio RCA Bird General Radio General Radio 61 db 61 58 Type 510B Type 1931A Type 1932...

Page 71: ...AN IKW ANTENNA COUPLER FOR MATCHING ANY TRANSMIS SION LINE TO AN ANTENNA HAVING A RESISTANCE OF FROM 10 TO 1000 OHMS AND A REACTANCE OF J 200 STANDARD TEE NETWORK IS USED CABINET IS WEATHERPROOF AND IS AVAILABLE IN ALUMINUM OR STEEL 3 INCH METER AND METER SHORTING SWITCH FOR LIGHTNING PROTECTION ARE INCLUDED WHEN ORDERING SPECIFY FREQUENCY AND POWER TYPE OF TRANSMISSION LINE TO BE USED AND HEIGHT ...

Page 72: ...e power conswnption has been re duced several kilowatts Bauer s advanced design has also reduced the tube complement by 50 and provided easy accessibility to all components These are just a few of the many advanced features available as standa_ rd equipment when you specify the Bauer Model FB 5000 J Complete detailed specifications available upon request Standard Features Vacuwn Capacitors Automat...

Page 73: ...with which cvcl y component can be reached All wiring is accomplished with just one harness which is sup plied with the kit propcrl_v laced and with each wire number coded All small components a re 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 instrnction hook shows the correct placeme...

Page 74: ...A te lrodes opera ting in parallel as a plate modulated power amplifier A motor driven rheostat in the cathode cir cuit of the final stage controls out put power so ns to compensate for variations in line voltage T he final tank circuit is unique in that tuning is accomplished through the use of n variable vacuum capacitor a top quality method not usually found in one kilowatt transmitters T he tr...

Page 75: ...ower nighttime pown a nd i a bonus for the kit builder who can perform initial t1111c 11p at low 1 ower The Control Circuits With the use of sc111i co11duelor power supplies the Bauer control circuits were greatly simplified and a 11 tomatic starting was provided Actually only one master start slop S itch is necessary since the silicon power supplies require 110 warmup time High voltage comes on a...

Page 76: ... Built In Remote Control Facilities Complete Set of Operating T ubes Tool Kit CRYSTAL BUFFER GENERAL PERFORMANCE CHARACTERISTICS AND SPECIFICATIONS T YPE OF El 11SSION A3 RATED POWER OUTPUT 000 500 250watts POWER OUTPUT CAPABILITY 100 watts R F OUTPUT lMPEDA lCE 50 ohms unbalanced fHEQ LIEi CY RANGE 540 1600 Kc FREQUENCY STABILITY 5 cps AUDIO INPUT LEVEL 100 mod l0dbm i REQUE CY RESPONSE 0 95 mod ...

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Bauer 707, Instruction Book

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