| zur vorigen Seite  to previous page | 
|  |  |  |  | 
| upper chassis | middle chassis | lower chassis | 
|  |  |  |  | 
| upper chassis | middle chassis | lower chassis | 
|  |  |  |  | 
| upper chassis | middle chassis | lower chassis | 
|  |  |  |  | 
| upper chassis | middle chassis | lower chassis | 
|  | 
| PRC-25 X2 |  |  | 
| PRC-25 X3 |  |  | 
| PRC-25 X4 |  |  | 
|  |  |  |  | 
|  |  |  |  | 
|  |  |  |  | 
|  |  |  |  | 
| Module# | Module function | SMD# | REV"A" | SMD# | PRC25? | PRC77? | 
| A1 | DC/DC Converter | 447269 | .. | . | yes | not needed | 
| A2 | PA Tank | 447620 | . | . | yes | repl/w A32 | 
| A3 | 1st Rx RF Amp | 447555 | . | . | yes | repl/w A33 | 
| A4 | 2nd Rx RF Amp | 337556 | . | . | yes | repl/w A34 | 
| A5 | Rx Mixer | 447462 | . | . | yes | repl/w A35 | 
| A6 | Tx IPA | 447557 | . | . | yes | repl/w A37 | 
| A7 | Tx 2nd RF Amp | 447558 | . | . | yes | no | 
| A8 | Tx 1st RF Amp | 447559 | . | . | yes | no | 
| A9 | VFO | 447554 | . | . | yes | repl/w A39 | 
| A10 | Interval Oscillator | 447407 | . | . | yes | repl/w A40 | 
| A11 | Discriminator | 447446 | yes | ? | yes | yes | 
| A12 | 2nd Mixer | 447447 | yes | ? | yes | yes | 
| A13 | 53 MHz Filter | 447448 | . | . | yes | repl/w A43 | 
| A14 | 1st Mixer | 447449 | . | . | yes | repl/w A44 | 
| A15 | 1 MHz Spectrum Gen | 447450 | . | . | yes | repl/w A45 | 
| A16 | Voltage Regulator | 447451 | yes | ? | yes | yes | 
| A17 | Phase Comparitor | 447452 | yes | ? | yes | yes | 
| A18 | 5.6 MHz IF | 447453 | yes | ? | yes | yes | 
| A19 | 1/4 Wave Network | 447454 | . | . | yes | no | 
| A20 | Sidestep Oscillator | 447455 | . | . | yes | no | 
| A21 | RX If limiter | 447177 | yes | 875724 | yes | yes | 
| A22 | Speech Amp | 447314 | . | . | yes | yes | 
| A23 | Tone Generator | 447316 | . | . | yes | yes | 
| A24 | Tone Squelch | 447318 | . | . | yes | repl/w A54 | 
| A25 | Rx Audio | 447113 | . | . | yes | repl/w A55 | 
| A26 | . | . | . | . | . | . | 
| A27 | . | . | . | . | . | . | 
| A28 | Antenna Loading | ? | . | . | yes | yes | 
| A29 | Tx PA | ? | . | . | yes | no | 
| A30 | Filter | ? | . | . | yes | no | 
| A31 | Tx Frequency Control | ? | . | . | no | yes | 
| A32 | RX Input | ? | . | . | no | yes | 
| A33 | Rx 1st RF Amp | ? | . | . | no | yes | 
| A34 | Rx 2nd RF Amp | ? | yes | ? | no | yes | 
| A35 | Rx Mixer | 448751 | yes | ? | no | yes | 
| A36 | Tx PA | ? | . | . | no | yes | 
| A37 | Tx IPA | 448745 | . | . | no | yes | 
| A38 | Tx VFO | ? | . | . | no | yes | 
| A39 | Synthesizer VFO | ? | yes | ? | no | yes | 
| A40 | Interval Oscillator | ? | yes | ? | no | yes | 
| A41 | . | . | . | . | no | no | 
| A42 | . | . | . | . | no | no | 
| A43 | 53 MHz Filter | 448739 | . | . | no | yes | 
| A44 | 1st Mixer | ? | yes | 621272 | no | yes | 
| A45 | 1 MHz Spectrum Gen | 448750 | yes | ? | no | yes | 
| A46 | . | . | . | . | no | no | 
| A47 | . | . | . | . | no | no | 
| A48 | . | . | . | . | no | no | 
| A49 | . | . | . | . | no | no | 
| A50 | Tx Mixer | 448753 | . | . | no | yes | 
| A51 | . | . | . | . | no | no | 
| A52 | . | . | . | . | no | no | 
| A53 | . | . | . | . | no | no | 
| A54 | Tone Squelch | ? | yes | 875637 | no | yes | 
| A55 | Rx Audio | 448752 | . | . | no | yes | 
| A56 | . | . | . | . | no | no | 
| A57 | . | . | . | . | no | no | 
| A58 | . | . | . | . | no | no | 
| A59 | . | . | . | . | no | no | 
| A60 | Wide Band Attenuator | ? | . | . | no | yes |