Hammarlund FM50A Installation And Service Manual Download Page 13 | Manualshive

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Summary of Contents for FM50A

Page 1: ...RLUND MFG CO Established 1910 INSTALLATION AND SERVICE MANUAL MARKETING DI TRIBU1 ION OUTERCOM ELECTRONICS CORP 502 Charlottetown Mall Charlotte North Carolina Telephone 333 8689 Area Code 704 Cable A...

Page 2: ...i j I IIi Z a FRONT VIEW MODEL FM 50 A FREE DOWNLOAD COURTESY OF N9SOR WWW HAMMARLUND ORG...

Page 3: ...es 0 0 0005 _30 0 to 60 C ambient temperature range OVEN CONTROLLED 16F3 5Kc deviation for 100 modulation at 1000 cps Instantaneous and automatic 25V rms input at 1000 cps for thresh hold of limiting...

Page 4: ...Supply Switching Transistors 8 IN 1490 Power Supply High Voltage Rectifiers IN 1490 Power Supply Relay Rectifier AC Operation Only 2 IN 2482 Transmitter Modulation Limiters Power Requirements Nominal...

Page 5: ...ansmitter filaments are turned off In the OPERATE position the receiver remains ON however the trans mitter filaments are also ON After a warm up period of about 20 seconds the transmitter is ready fo...

Page 6: ...ur serviceman 7 Become familiar with the F C C rules and regulations concerning operation of two way radio for your particular class of service Transmitter Tune Up Procedure CAUTION The plate capacity...

Page 7: ...place g Mter making the above adjustments the transmitter frequency should be set against a known standard This adjustment is C183 associated with the crystal oscillator stage V1I3A h Mter making the...

Page 8: ...ping the front panel volume control below the overload point b With an on channel frequency modulated signal applied to the input of the receiver readjust LI09 for maximum recovered audio 8 a Loosely...

Page 9: ...ways that the unit may be mounted in the cab or in area that is accessible to the driver In most business and industrial applications it will be found that it is most desirable to locate the receiver...

Page 10: ...te the hot lead at the fuse holder cutting off any extra cable Using this extra cable run a lead from the other side of the fuse holder to the hot side of the battery Terminate this hot lead at the ba...

Page 11: ...f continuity between its inner and outer conductors Attaching Co Axial Cable Connector a Cut cable off square at the proper length b Cut off one and one eight inches of outside plastic insulation jack...

Page 12: ...dimension may correct the condition FREQUENCY ADJUSTMENT The Federal Communications Commission requires that all transmitters of this type be checked for frequency upon installation and at least once...

Page 13: ...id M23034 31 005 mid M23034 31 el ectrol ytic 40 40 40 450V 40 25V K15504 72 SYM80L DESCRIPTION PART NO NOTE All capacitors are disc ceramic 20 and 500V unless otherwise specified CIOI Temp Comp Disc...

Page 14: ...V M23034 42 Ll07 coil I f 10 7 mc K26624 1 C199 leed thru special K23094 1 Ll08 coi I I F 10 7 me K26622 1 C200 005 mfd M23034 31 Ll09 coi I quadrature detector 1650 kc K26639 1 C201 005 mid M23034 31...

Page 15: ...9309 113 R165 15k K19309 77 R123 68 ohms K19309 21 R166 220k K19309 105 R124 lOOk K19309 97 R167 3 31 K19309 61 R125 1 5k K19309 53 R168 4701 K19309 113 R126 1 51 K19309 53 R169 470k K19309 113 R128 l...

Page 16: ...sformer switching M26672 1 Yl03 crystal 9050kc K26673 1 Tl08 transformer power P26649 2 Yl03 crystal 12300kc K26674 1 see note VIOl Vl02 tube el ectron 6BS8 tube electron 6BR8 K40906 1 K40907 1 Substi...

Page 17: ...ounting Bracket for Mobile Applications includes Mounting Hardware Standard Mobile Antenna Kit Consists of Antenna Specialists Type ASP 126 Antenna Assembly with 12 RG5S D Cable attached PL259 Connect...

Page 18: ...MP 12 V DC FUSE RED 0 12 v DC POSITIVE 8 GROUND BLACK 7 20 AMP 12 V DC FUSE RED 6 V DC NEGATIVE 8 GROUI JD 00 BLACK 7 30 AMP 6 V DC FUSE RED 6 V DC POSITIVE 8 5 2 GROUND BLACK 7 00 30 AMP 6 V DC FUSE...

Page 19: ...I TIOI I I n I I L101 I VIIO I o 8 I I o I I V I I L J o 8 TRAP Z m o Z L116 S 8 4 VIII ZFIOI o n I i 4 I 8 L109J EJ MICROPHONE DISC o TI03 8B88 z c S LIDSJ LID J 8 lU Q EJ ZFID2 SPIOI _ FREE DOWNLOAD...

Page 20: ...I I I 0 I I I I I 0 1 W W OU 0 0 f 0 CABINIT REAR VIEW 20 FREE DOWNLOAD COURTESY OF N9SOR WWW HAMMARLUND ORG...

Page 21: ...1 0 100 MICRO AMMETER 2000 OHM INTERNAL RESISTANCE RECEIVER SW POSITION TRANSMITTER 3 2 I ST OSCILLATOR GRID I I ST LIMITER GRID 2 2 ND LIMITER GRID 3 4 5 6 7 I ST MULTIPLIER GRID 2 NO MULTIPLIER GRID...

Page 22: ...are hereby excluded from the provisions of this warranty Pilot lamps and fuses are not guaranteed for length of service Except as herein specifically provided no warranty express or implied other than...

Page 23: ...to tenninal 13 to provide additional transistor protection from primary power sources with poor regulation DC operation only 8 R179 47 ohms which serves as a fuse as well as part of the transistor bi...

Page 24: ...e presence of a weak on frequency signal L106 and L107 should not be detuned so far that the second limiter grid current in the absence of a signal drops below saturation All units shipped on and afte...

Page 25: ...H REMOTi LOCAL C141 I 2 2 K_ Ri5 1_ 00 CI40 470 RI44 RI37 tSIOIA q K 330K JI03 CI46 PIN B OOS MFD RII6 RI15 1470K RI38 47K CIISl CII9 330K 100T T CII6 L 01 O RCVR 270 RI43 CI94 a CD CD CD CD 15K B CI9...

Page 26: ...UES ARE IN MICRO MICR UNLESS OTHERWISE SPECIFIED ALL RESISTOR ARE 1 2 W 10 UNLESS I SPECIFIED ll THIS CAPACITOR SUPPLIED AS PART TYPE 6146 VIIO HAMMARLUND PART NO K RECOMMENDED FOR BEST PERFORMANCE 5...

Page 27: ...2 K 0 X X IX 20K 2 2K IOfE 9 0 30K 50K 1M X IXC 0 PIN VIIO VIII VII2 VI13 VII4 I 0 lOOK 220 Jl 100 K 600K 250K 2 0 lOOK 00 1M 3 00 lOOK 00 220 n 3 3K 4 0 0 0 5 17K 0 6 0 00 0 00 220K 7 00 220K 00 220K...

Page 28: ...WHITE GREEN DYNAMIC CARTRIDGE TRANSISTOR AMPLIFIER PALM MICROPHONE PT NO P26681 2 REPLACEMENT PARTS LIST CARBON MICROPHONE ELEMENT PI NO K 53029 1 DYNAMIC MICROPHONE ELEMENT PT NO K53030 1 MICROPHONE...

Page 29: ...200 31 250 lIE 1 4 55 1 V AC V AC V AC 8 V AC 255 155 220 6 3 V AC 9 lIE 225 20 2 42 1 265 6 85 iIlAO 2 12 I 4 5 2 31 0 I 7 165 75 205 180 205 65 lIE 1 0 2 44 I 5 0 2 1IE0 5 I 70 195 100 70 X X X X IE...

Page 30: ...3 6 9 12 15 18 21 24 TEST SOCKET REMOTE SOCKET PUSH TO TALK GRID EARPIECE AUDIO 1 2 V 0 0 3t J 4 05 OR ACCESSORY I REMOTE SQUELCH PA PLATE I PA GRID GROUND PA PLATE CO J RCVR AUDIO TRANS DRIVER GROUN...

Page 31: ...the transmitter is retuned to a different frequency The correct neutralization adjustment procedure is as follows a Set C158 for minimum capacity as shown in the above sketch Solder mound of rotor fur...

Page 32: ...E THAN A FEW SECONDS AT A TIME e If preceding step reveals no self oscillation leave C158 at its present setting If oscillation persists reduce capacity of neutralization capacitor in small steps unti...

Page 33: ...0 47 I a 7 I D I L 4 1 r 1 BI RI39 1 B 2 MEG 6BOK CI43 I 047 MFO CI44 005MFO I 005 MFO L r 3 RI34 3 3 MEG CI42 01 MFO C OI RI41 500K 4Ii 6e MFa T 3 K RI47 470K i v RI48 470 1 IW IN B2 VOLUME MFO RI33...

Page 34: ...MULT 2X VIII H 6360 L10S CI09 RI07 n2 I SK NPO CI07 6 002 MFD CIIS RI06 ISK CliO 270 CI06 IW ISOO 002 RII2 RII3 MFD lOOK lOOK ZFIOI l rtff 1 J 1 5K CI02 r OOS MFD RIO 330K JI05 PIN I POWER AMPLIFIER...

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