From the library of WØMTU
Page 1: ...AM 30P Series AM Transmitter Manual Model AM 30P LPB COMMUNICATIONS INC 311 Spruce Street Camden NJ 08103 1929 856 365 8585 PH 856 365 8999 FX www lpbinc com From the library of W MTU...
Page 2: ...2 40 CIRCUIT DESCRIPTION 2 4 1 Summary 4 2 Power Supply 4 3 Exciter 4 3 1 Audio 4 3 2 Oscillator 4 3 3 RF Pre Driver and Driver Stages 4 4 RF Power Amplifier 4 5 Audio Limiter L Option 5 0 INSTALLATI...
Page 3: ...d Warranty We guarantee that you will find the appearance vorkmanship and standards of material and construction of this equipment in keeping with the application and vith good standards ofcommercial...
Page 4: ...etering requirement We suggest the licensee employ an Antenna Current Meter such as the Simpson model 37 3 Y2 RF Ammeter When looking into a 50 ohm load the 30 watt transmitter needs a 0 1 full scale...
Page 5: ...rated to indicate oVU at 100 modulation with a tone input kHz standard connected to the transmitter audio input Balanced modulation A4 provides a low level amplitude modulated signal This output is sq...
Page 6: ...C3 E 11 28 r ul PO VER SUPPLY Component Layout From the library of W MTU...
Page 7: ...I II I Ql I I I L J _l I T1vr r R2 I CR21 C3 L N V V CR3 f l__ I Fl JRI I I 1 28 v I r I D 3 DSl Sl 8 1 15 v I o 1 j 0 I _L ASS Y 6015 REV B L __ J A I t30P 60P 100P POWE_R SU PPLY J6016 REl V 13 From...
Page 8: ...R14 IS 1DUNTED ON BACK OF BOARD AUDIO INPUT AUDIO GAIN GND 15 o DET GND SEE NOTE 112 GND RF RF OUT DRIVE 1DTE 1 U IS FACTDRY ADJUSTED NOTE 2 C43 IS FACTORY SELECTED FIG 3 AH 30 P EXCITER From the lib...
Page 9: ...9 R22 REGl TRII I L6 0 C5 T2 C6 R33 15V c r 1 R 4 10 R10 0 nII C UDID T 6 AUDIO u GAIN R51 TEST IN REL R7 I AUDIO R6 R52 POINT IR RF 2 0 JUT R F OUT MOD I D8 _ 9 C9 4 I 1 R12 I R36 1 R541 i _ _J 1 __...
Page 10: ...utput is sampled to present Relative RF Output on the VU meter with tbe switch S2 011 the exciter in the REL RF OUT position The elliptic filter is designed to operate over one third 1 3 of the 530 kH...
Page 11: ...o r r l I vi 1l I C31 IC36 lR45 L2 L3 28 cr C26 C27 I I C29 I 15 R46 INI lou 0 J I A5 C38 C37 R40 R39 I I 7 L r l I R38 l _ AM 30P 160P 1100P RF PO ER AMP MODULE RFA 30 SCHEMATIC Dwg No 6006 REV A Q6...
Page 12: ...i 1 __ i _ _ i j r i I i L4 i J I 2 i I l_ t tl Ii r f If I 1 l r r p r I I I 11 CJ i r yj 04 Ii l i I I L th I I R4 1 I I I I 1 I I I I I i I I i i I I _ RF POWER AMP COM P 0 N E N T L A YO U T FIG...
Page 13: ...1 I TRANSM TIER t 10UNTING DIMENSIONS FIG 7 y II II Ii II I P F OUT _ 0 i I I j r i i I I I I TR I S ITIER I OUTLINE f iOUIHII G I VIEWED FROM FRONT j I I PCYv ER CORD CHASSIS IEWED FROt 1 BOnOM TPAN...
Page 14: ...the transmitter 6 0 CONTROL SETTINGS AND OPERATION 6 1 User Control Descri ptions and Locati ons A number of trim pots are located inside the transmitter Some are factory set and sealed Removing any...
Page 15: ...e radio and result in a misleading interpretation of signal quality 7 0 BASIC TROUBLESHOOTING GUIDE PROBLEM POSSIBLE CAUSES LED power indicator does not light No Power on AC receptacle or F I blown No...
Page 16: ...UD 22 18 GA WIRE 195 1015 RF POWER AMPUF ER PIN 6005 A 1 1 POWER AMP PCB 671 6008 R39 1 TRIM POT 1K OHM 775 1080 R40 1 RES 680 R 1 2W 5 762 2117 R41 1 RES 4 7 R 1 2W 5 762 2065 R42 43 2 RES 22 R 1 2W...
Page 17: ...4 1005 3 RF TORROIDAL TRANSFORMER INPUT TR FIAL SEE SCD 865 1005 4 RF TORROfDAL TRASNFORMER OUTPUT SEE seD 865 1010 5 QUANTiTY EQUALS LENGTH IN iNCHES 6 FILTER COMPONENT VALUES VS FREQUENCY RANGE LOW...
Page 18: ...W 5 763 4097 2 r14 R21 R24 R12 R55 2 TRIMPOT 1KHZ 775 1085 1 R13 R18 2 RES 1 8K OHM 1 2W 5 762 2127 R20 R27 2 RES 3K OHM 1 2W 5 762 2132 R15 R23 2 RES 820 OHM 1 2W 5 762 2119 R25 1 RES 47 OHM 1 2W 5 7...
Page 19: ...MAGr ET 20 AWG SWITCH DPDT TRANSISTOR 2N3904 TRANSISTOR 2N3879 CRYSTAL CRYSTAL SOCKET VU METER 1 5 COPPER BUSS WIRE 20 AWG SOCKET TRANSISTOR 3 PIN HEATStNK TO 66 PC MT SOCKET IC 14 PIN SOCKET HEADER...
Page 20: ...PPLY ASSEMBLY PIN 6807 A Symbol Qty Description Part 1 1 POWER SUPPLY PCA 671 6018 R1 1 RES 1K OHM 1 2W 5 762 2121 R2 1 RES 390 OHM 1 2W 5 762 2111 C R2 1 DIODE ZENER 1N4751A 30 781 1081 CR3 1 RECTIFI...
Page 21: ...32 X 5 8 PH PHLIPS SCREW 10 32 X i 2PH PHUPS HEX NUT W LOCKWASHER 6 32 HEX NUT 10 32 LOCKWASHER EXR TOOTH 10 SOLDER LUG 10 1 NYLON VENT PLUG 18 AWG HOOK UP WIRE BLACK 18 AWG HOOK UP WIRE RED 20 AWG PV...
Page 22: ...9 18 4 40 48 19 3 Description Povver supply assemb y RF side panel drilled TSTR NPN DARUNGTON MJF 6388 BRIDGE RECTIFIER 50V 6A SWITCH SPOT TOGGLE SCREW 4 40X 3 8 PH PHILUPS SCREW 6 32X1 4 PH PHILLIPS...
Page 23: ...TG LOCATfON F NECESSARY APPLY A TH N eOAT OF THERMAL HEATSlNK COMPOUND 2 USE A TH N COAT OF THERMAL HEATSlNK COMPOUND BETWEEN COMPONENT AND HEATSINK SCRPAE PAINT IF NECESSARY 3 QUANTITY EQUALS LENGTH...
Page 24: ...BC RCD 28V POWER SUPPLY ASS Y N O SURGE ARRESTOR I __ C l COAX 1 i R2S I A3 I v N I illS I b 7 O 1 C6 R9 II N AUDIO IN _ _ C Oj l l r 1 i D T VHT o I 4 7 52 D6 05 I 7 J EXCITER ASS Y 6094 REV F OUT RF...
