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SERVICE

MANUAL

PB010 CHASSIS (COBRA 148GTL-DX, SUPERSTAR 360 FM)

PB042 CHASSIS (PRESIDENT JACKSON)

PC999 CHASSIS (PRESIDENT GRANT)

OTHER UNIDEN CB CHASSIS - APPLICATIONS

The information in this bookcan be applied to many other

Uniden CB radios since all the current production units

are basically the same.
Examples are:

Stalker 9-FDX, President McKinley export (PC 893).

This uses the MB 8719 and is an 80-channel transceiver

using a single loop Oscillatorcrystal in the 15 MHz range.
It is AM/FM/SSB and same versions also hâve the

British CB band which is switched in by anothercrystal on

a separate sub-PC board.

Cobra 146GTL. President AR-144/AX-144, Midland

6001/7000 (new version), Realistic TRÇ451,

Sears 663.3810, Uniden PC-244. This is basically

identical except for the lack of FM, and the PLL circuit

which uses a uPD2824 ROM chip..

Содержание PB010

Страница 1: ...e Examples are Stalker 9 FDX President McKinley export PC 893 This uses the MB 8719 and is an 80 channel transceiver using a single loop Oscillatorcrystal in the 15 MHz range It is AM FM SSB and same...

Страница 2: ...ce type 6 dB 4 2 KHz 60 dB 7 KHz CHANNEL INFORMATION A M T F R E Q U E N C Y M H Z Automatic Gain Control AGC Less than 10 dB change in audio LO W M ID H IG H LO W M ID H IG H output for inputs from 1...

Страница 3: ...5 26 545 26 985 26 995 27 435 27 445 27 885 27 895 4 26 105 26 115 26 555 26 565 27 005 27 015 27 455 27 465 27 905 27 915 5 26 115 26 125 26 566 26 575 27 015 27 025 27 465 27 475 27 915 27 925 6 28...

Страница 4: ...duce the second IF of 455 Khz In the TX mode the V C O m xes w th the 10 695 Mhz Carrier O sc llator signal to produce the direct 27 Mhz on channel frequency In order to broadband the VCO to operate o...

Страница 5: ...15 82 1 27 127 15 82 0 8 2 M H z 82 Ch 40 16 26 1 126 16 26 1 71 171 16 26 1 26 126 BAN D C M ID C h l 16 27 1 27 127 16 27 1 7 2 172 16 27 0 8 2 82 Ch 40 16 71 1 1 171 16 71 2 1 6 216 16 71 1 26 126...

Страница 6: ...26GT71 SIMPLIFIED PLL DIAGRAM OF THE UNIDEN EXPORT CHASSIS V a n t...

Страница 7: ...or 0 Outputs at SI to S4 w h ich are in turn a p p lie d to the binary programming o f the PLL pins The above exam ple shows hookup to the PB010 and PB042 chassis For the PC999 G R A N T the p r n c...

Страница 8: ...For 0 chassis Reference Crystal is shifted up 450 K H z to 1 5 0 0 M H z Thus LO W 6 7 N M ID 112 N H IG H 1 5 7 N o f C h S e le c to r s w itch IC9 LSB __________________ IC8 MSB i 2 4 8 i6 32 64 12...

Страница 9: ...al passes to TR8 the Second Mixer It mixes with a sample of the 10 24 MHz PLL signal to produce the second IF of 10 695 MHz 10 240 MHz 455 KHz The 455 KHz signal is amplified by TR9 TRIO and TR11 For...

Страница 10: ...ingle Driver TR43 The PB042 chassis JACKSON uses a high gain MRF477 Final amp to also produce double the normal RF power output II FM The 27 MHz carrier is produced in exactly the same way as describe...

Страница 11: ...If the PLL circuit becomes unlocked this pin qoes LOW about 0 0 VDC switching appropriate diodes and transistors which disable the TX and RX circuits preventing off frequoncy operation VIII ROGER OSC...

Страница 12: ...istor damage Compare PB010 PC999 schematics for the following steps Notice that the holes notches silkscreen markings already exist in the area between TR45 TR44 1 Add a bare jumper wire at 1JP 7 7 dd...

Страница 13: ...ting channels The 1CH9 position activ tes the expansion In the LO TONE position you will get 27 875 MHz Ch 12 to 28 175 MHz Ch 40 and in the HI TONE position you will get 28 195 MHz Ch 12 to 28 495 MH...

Страница 14: ...O J 1 0695M H z 1 0695M M I 069bM H z NBA G C T R 4 N T R1 N T R 2 N A M P T R3 D E O l 0 2 t___ i _ _ TP7 TP 8 V R IO 8 IA SA O J I fiN A LIM P U T C H E C KP O IN T X V R II B IA SA O J A MM O D TR5...

Страница 15: ...PLL AND CARRIER OSCILLATOR TEST EQUIPMENT SETUP TRANSMITTER TEST EQUIPMENT SETUP RECEIVER TEST EQUIPMENT SETUP...

Страница 16: ...escribed si ce it has 2 crystals at center detent Remove scope from TP3 and attach Frequency Counter to this point now AM Adjust L21 for Adjust L25 MID band Adjust L14 for 16 4900 MHz L22 LOW band for...

Страница 17: ...akthrough recheck for LSB mode CARRIER BALANCE Adjust VR7 for min carrier leakthrough recheck for LSB mode CARRIER BALANCE Adjust VR5 for min carrier leakthrough recheck for LSB mode 4 Same as Step 2...

Страница 18: ...L5 L 4 L3 L13 L12 L11 L9 L8 L7 L52 for maximum reading on AF VTVM scope or radio S Meter Adjust L9 L8 L7 L6 L5 for maximum reading on AF VTVM scope or radio S Meter 3 Switch to USB Remove modulation...

Страница 19: ...ALIGNWENT LOCATIONS A N T C O A X 20...

Страница 20: ...I 9 LI 2 0 JP47 L8 0 X LI 0 L9 LI 7 1 4 LI 1 LI 3 4 TP2 R121 RI 27 L2 LI 8 0 Y p a L 4 M 15 PlRV R 5 L 5 2 M 0 G J VR7 ED VR l L15 T P 6 R 60 A N T C O A X I I PC 999 V R l5 VR13 L27 L24 L26 L23 L25 0...

Страница 21: ...VR10 N W L42 L43 ALIGNMENT LOCATIONS ANT COAX 22...

Страница 22: ...0 0 TR38 TX Voltage Sw B 7 90 RX 7 60 TX C 0 0 RX 8 20 TX E 8 40 TR39 CW Sw B 0 70 CW C 0 0 CW 2 75 AM FM SSB TR41 Voltage Regulator TR53 AMC Amp B 13 00 SSB CW 12 10 AM FM TX B 0 90 C 8 40 C 7 70 E...

Страница 23: ...0 82 TX E 0 0 TR33 PA Switch B 4 50 PA C 5 80 PA E 3 90 PA TR34 B 7 80 TX C 0 78 TX E 8 3 TX TR35 RX voltage source B 7 70 RX C 0 26 TX 8 40 RX E 8 4 TR36 RX voltage source B 0 10 TX 0 70 RX C 7 86 T...

Страница 24: ...Final TR41 42 Finals TR36 Final 8 0V p p Base 7 5V p p Bases 4 0V p p Base 35 0V p p Collector 40 0V p p Collectors 35 0V p p Collector OSCILLATORS TR24 10 24 MHz Pin 7 MB8719 TR19 10 24 MHz 2 50V p p...

Страница 25: ...730 L 2SC1973 2 S D 4 7 1 L 2SA4 73 0 2SA1012 0 2SC2166 C 2SC2312 C M R F 7 7 2 S B 75 2SB525 C 2SC2086 D 2SD355 A N O D E C A T H O D E M A R K c a t h o d e 1N 6 0 A M H h i M C 301 TLRG 101 1N 4 0...

Страница 26: ......

Страница 27: ...p e s to e n t...

Страница 28: ...GRANT N TR40I...

Страница 29: ...R3I 2SD355E TR 33 2SB525D 072 2 T 92079 R200 9 4 0 K OTI IS tO T S 201470 192079 OU g U N H R y 14 T R 3 4 2SC 945AQ T R 5 0 I 2 S A 4 7 3 K ci o 90VO 22 R229 9 T R 3 6 2 S C 9 4 5 A 0 R 2 2 s k 2 9 4...

Страница 30: ...CS FRANCE P B O lO...

Страница 31: ...SS 3 6...

Страница 32: ...P tz e s ia e n t...

Страница 33: ...RICHARD...

Страница 34: ...e D27 I i u 777 777 X2 15 48 25M hz D31 R187 100K R185 4 7K R186 4 7K D32 R188 15K A w 2 N aiT g O 4 3 s O 5 C s 4 0 S h DL J n c c D33 V R 6 50K TR26 2SC1675L X3 R205 220 D37 D34 L23 LB 137 R206 4 7...

Страница 35: ...n s i Z o n e I n d u s t r i e l l e B P 3 6 3 4 5 4 0 B A L A R U C T l 1 6 7 1 5 3 2 2 8 8 t l e x 4 9 0 5 3 4 F 14 CIRCUIT DIAGRAM GEh...

Страница 36: ...J ts Qtsac McKinley FM 1981 DIAGRAM GENERAL...

Страница 37: ...PC 8 9 3...

Страница 38: ...TOR WATTAGES ARE l R W UNLESS OTMERWlSE NOTEO S CAPACITANCE VALUES ARE INOICATEO IN MICROFARAOS ONLESS OTHERWISE NOTEO P MICRO MlCROF ARAD 4 ALL CAPACTORS TEMPERATURE CHARCATERlSTICS ARE t L LESS N IO...

Страница 39: ......

Страница 40: ......

Страница 41: ......

Страница 42: ...6 0 H M RESISTOR WATTAGES ARE I 8 W UNLESS OTHERWISE NOTED CAPACITANCE VALUES ARE INOICATED IN MICROFARADS UNLESS OTHERWISE NOTEO p r M IC R O M IC R O FA R A O A LL CAPACTORS TEMPERATURE CHA RC ATE...

Страница 43: ......

Страница 44: ...H M m I 0 6 0 H M 2 RESISTOR WATTAGES ARE I 8 W UNLESS OTHERWISE NOTED 3 CAPACITANCE VALUES ARE INOICATEO IN MICROFARADS UNLESS OTHERWISE NOTED P Ml C R O M IC R O FA R A D 4 A L L CAPACTORS TEMPERAT...

Страница 45: ...BLOCK DIAGRAM El C...

Страница 46: ......

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