The Cybernet Chassis!

Make Model CH AM FM SSB CW Chassis Dload PLL Circuit BF Driver PA Manual
  Ham International  Viking 80 AM FM -

-

PTBM094COX PLL02a TA 7205P 2SC1846 2SC1306 Cybernet
  Ham International  Viking 2 160 AM FM - - PTBM094COX PLL02a TA 7205P 2SC1846 2SC1306 Cybernet
  Ham International  Viking 3 200 AM FM - - PTBM137AOX PLL02a TA 7205P 2SC1846 2SC1306 Cybernet
  Ham International  Jumbo 120 AM FM SSB - PTBM059AOX PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Ham International  Jumbo 2 120 AM FM SSB - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Ham International  Jumbo 3 200 AM FM SSB CW PTBM133A4X PLL02a AN 7140 2SC2166 2SC2050 Cybernet
  Ham International  Multimode 2 120 AM FM SSB - PTBM059COX PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Ham International  Multimode 3 200 AM FM SSB - PTBM133A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Ham International  Puma 80 AM FM - - PTBM049AOX PLL02a TA 7205P 2SC2034 2SC1974 Cybernet
  Ham International  Puma 120 AM FM - - PTBM092COX PLL02a TA 7205P 2SC2036 2SC1974 Cybernet
  Ham International  Concorde 120 AM FM SSB CW PTBM059COX PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Ham International  Concorde 2 120 AM FM SSB CW PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Ham International  Concorde 3 200 AM FM SSB CW PTBM133A4X PLL02a AN 7140 2SC2166 2SC2050 Cybernet
  Ham International  8040 80 AM - - - PTBH023AOX PLL02a 2 x 2SC945 2SC1974 2SC2074 Cybernet
  Ham International  UK 120 120 AM FM - -

 HAM UK 120

LC7120 TA 7205AP 2SC1306 2SC1307 No
  Ham International  Explorer 22 - FM - - PTBM117AOX PLL08A TA 7205AP 2SC710 2SC1974 Cybernet
  Ham International  Hercules 22 - FM - - PTBM117AOX PLL08A TA 7205AP 2SC710 2SC1974 Cybernet
  Ham International  Mariner 22 - FM                 Cybernet
  Ham International  Viking B 22 AM FM -

-

PTBM094COX PLL02a TA 7205P 2SC1846 2SC1306 Cybernet
  Amroh  708 22 - FM - - PTBM117AOX PLL08A TA 7205P 2SC710 2SC1384 Cybernet
  Cobra  148 GTL - B 80 AM - SSB   PTBM122DOX PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Cobra  150 GTL 120 AM FM SSB   PTBM121D4X PLL02a TA 7205 2SC2166 2SC1969 Cybernet
  Colt  485 SSB 40 AM - SSB   PTBM048AOX PLL02a TA 7205P 2SC2086 2SC1957 Cybernet
  Colt Excalibur  1200   AM FM SSB   PTBM048AOX PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Colt Excalibur  1200 DX 120 AM FM SSB - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Colt Excalibur  Mk2 160 AM FM SSB - PTBM125A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Colt Excalibur  2002 240 AM FM SSB CW PCMA001S AN6040 AN 7140 2SC2166 2SC1969 Cybernet
  CTE International  Alan CX 450 120 AM FM SSB                
  Cybernet  Alpha 1000 22 - FM - - PTBM117AOX PLL08A TA 7205P 2SC710 2SC1974 Cybernet
  Cybernet  Alpha 3000           PTBM134AOX LC7136 TA 7205P 2SC1973 2SC1909 Cybernet
  Formac  120 120 AM FM - - PTBM106AOX PLL02a TA 7205 2SC1846 2SC1969 Cybernet
  Hygain  40 40 AM - - - PTBH023AOX PLL02a 2 x 2SC945 2SC1974 2SC2074 Cybernet
  Hygain V  2705 40 AM - SSB - PTBM048AOX PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Hygain V  2795 DX 120 AM FM SSB - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Hygain V  8795 200 AM FM SSB CW PTBM131A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Gamond  AFS 485B 120 AM FM SSB   PTBM059COX PLL02a TA 7205P 2SC2166 2SC2312 Cybernet
  Intek  1200 FM 120 AM FM SSB - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Kinor  Satellite-2000 22 - FM - - PTBM117AOX PLL08A TA 7205P 2SC710 2SC1384 Cybernet
  Lafayette  1200 FM 120 AM FM SSB - PTBM121D4X PLL02a TA 7025P 2SC2166 2SC1969 Cybernet
  Major  M 120 120 AM FM - - PTBM094COX PLL02a TA 7205P 2SC1846 2SC1306 Cybernet
  Major  M 360 120 AM FM SSB - PTBM059COX PLL02a TA 7205P 2SC2166 2SC2312 Cybernet
  Major  M 588 80 AM FM SSB - PTBM059COX PLL02a TA 7205P 2SC2166 2SC2312 Cybernet
  Major  M 688 120 AM FM SSB   PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Major  M 788 200 AM FM SSB   PTBM133A4X PLL02a AN 7140 2SC2166 2SC2050 Cybernet
  Marko  CB 444 120 AM FM - - PTBM106AOX PLL02a TA 7205P 2SC1846 2SC1969 Cybernet
  Marko  747 120 AM FM SSB CW PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Marko  Excalibur 160 AM FM SSB   PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Marko Excalibur  Mk2 120 AM FM SSB           2   Cybernet
  Mettso  Bordeaux 40 40 AM FM SSB  - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Midland  5001 40 AM - -   PTBM108AOX PLL 03 UPC1181H 2SC1760 2SC1306 Cybernet
  Midland  7001 (US FCC) 40 AM - SSB -

PTBM107AOX

UPD2816c UPC1182 2SC2166 2SC1969 Cybernet
  Midland  7001 120 AM FM SSB   PTBM059COX PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Midland  7001 400 AM FM SSB   PTBM125A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Midland  Alan 88 S 40 AM FM SSB   PCMA001S PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Petrusse  Pacific 160 160 AM FM SSB   PTBM131A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Petrusse  Pacific 200 200 AM FM SSB   PTBM131A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Petrusse  Pacific 2002RE 200 AM FM SSB               Cybernet
  Petrusse  Excalibur 200 AM FM SSB   PTBM131A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Rama  Rama 40/80 40/80 AM FM SSB - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Rama  RM 85 120 AM FM SSB - PTBM121D4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Superstar  2000 200 AM FM SSB CW PTBM125A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Superstar  2002 200 AM FM SSB CW PTBM125A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Superstar  2200 240 AM FM SSB CW PCMA001S AN6040 AN 7140 2SC2166 2SC1969 Cybernet
  Tagra  Paris 40 AM FM - - PTBM126AOX PLL03A TA 7205P   2SC1306 Cybernet
  Tagra  Pacific II 160 AM FM SSB - PTBM125A4X PLL02a TA 7205P 2SC2166 2SC1969 Cybernet
  Tagra  Pacific III 200 AM FM SSB - PTBM131A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Tristar  727 120 AM FM - -              
  Tristar  747 120 AM FM SSB - PTBM121D4X PLL02a TA 7025P 2SC2166 2SC1969 Cybernet
  Tristar  747 (+/- 5 Khz) 120 AM FM SSB - PTBM125A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Tristar  777 120 AM FM SSB CW PTBM125A4X PLL02a AN 7140 2SC2166 2SC1969 Cybernet
  Tristar  797 200 AM FM SSB CW PCMA001S AN6040 AN 7140 2SC2166 2SC1969 Cybernet
  Tristar  848 240 AM FM SSB CW PCMA001S AN6040 AN 7140 2SC2166 2SC1969 Cybernet
CYBERNET CHASSIS
PTMB134A0X
REPAIR TIPS
(Models include:)
ROTEL RVC240
HARRIER CBX
YORK JCB863
BINATONE 5 STAR
HARVARD 420M
HAM INT. UK
BARACCUDA LJM
SAPPHIRE X-4000
FORD ROADMASTER 505
RADIOMOBILE 202
CYBERNET BETA 3000
FIDELITY 2000

No TX no RX
1/ Try replacing Q18 (2SC1318)
2/ Sometimes transmits one channel, channel selector appears useless. D2 (6.2 Zener Diode) also check PLL IC LC7136/7 by replacement

NO TX
1/ Check if there is any TX at all by checking with a rig on the same channel next to the radio in question. If there is nothing try Q2 (JC502) located behind the VCO.
2/ Check red trimmer by slight adjustment (the one nearer the back) as this sometimes gets wax damage and may need cleaning / replacing (very common) Can also drop channels at their extremes if adjusted wrong

No TX power but RX on another Rig
1/ Try replacing O/P transistor (2SC2078) located in the screened area.
2/ Driver Transistor Q5
3/ Red trimmer (again) slight adjustment. Heat with soldering iron then spray with switch cleaner to remove wax.
4/ Check associated coils and track T2, T3, T4 with slight adjustment
5/ Check hi/lo pwr switch and RV5

Problems with Receive

With incoming signal but no sound
1/ Check internal speaker and speaker jack socket (extension speaker)
2/ Check associated wires and track
3/ Replace audio IC (TA7205) which also sometimes affects outgoing modulation too. NB. If you rub your finger across the back of the Audio IC with the volume up and it makes a sound chances are the IC is fine and the fault lies elsewhere. If its completely dead its more than likely the Audio IC.
4/ Slight adjustment of T12 (Front right) this also if the receive is fuzzy or sounds off frequency.

With very low RX
1/ Try adjusting coils T11, T10, T9, T8, T7, T5 slightly while monitoring signal strength on a nearby rig until the power increases enough to show on the TX meter or swr/power power meter.
2/ Check solder link trackside of T7 (If removed will cause signal drop when RF gain fully open)

Miscellaneous Faults

1/ Channels all mixed up, sometimes giving 2 lots of 20 channels,. Where the channel selector pins enter the main PCB, link wires directly from pins to the PLL IC (common fault where channel selector retaining nut works loose) also check for solder splashes on channel selector board or PLL itself.
2/ Increase TX modulation by linking out R72 or reducing its value and tuning RV2 to suit.
3/ Increase incoming audio by linking out R57 or reducing its value.
4/ VCO is compatible with that from an Amstrad board.
5/ No squelch but associated parts seem ok. Replace audio IC (TA7205).
6/ Low audio/poor sensitivity on RX/low power on TX, replace Q18.
7/ If midblocking, broadband VCO by replacing C4 (33pf to 22pf)
8/ No channel display, replace Q251 on underside of channel selector PCB.
9/ Bad buzz when switched on. FM IF detector faulty (Probably mains or 24v damage)