The PR99MKII kit covers the following pcb's:


- Power Supply                                            - Reproduce Amplifier
- Capstan Speed Control                            - Output Amp
- Fader Control                                             - Sync Amp

- Line Input                                                   - Input Amplifier                     - Tape Drive Control

- Locator Command
- Locator MPU
- Record Amplifier
- Oscillator

The A77MKI-MKIV kits cover the following pcb's:


- Power Supply
- Speed Control
- Switchboard
- Drive Control
- Input Amplifier
- Record Amplifier
- Oscillator, 2 or 4 track
- Reproduce Amplifier
- Record Relay

Important A77 note: Some versions of the A77 MKI & MKII used a first generation Speed Control pcb, 1.077.725, which is a transistor based speed control circuit.

As far as we know the MKIII and MKIV all used the later IC based speed control pcb, 1.077.724/729.

We need to know which version speed control pcb you have, so that we can send you the correct pcb upgrade kit for this, thank you!

See important note below re your A77!

The PR99MKI kit covers the following pcb's:


- Power Supply                                - Capstan Speed Control                        - Tape Drive Control                        - Sync Amp
- Fader Control                                 
- Line Input

- Input Amplifier
- Record Amplifier
- Oscillator
- Reproduce Amplifier
- Output Amp

Each kit consists of its parts, a parts list based on Revox's own part numbers and a pcb layout, to make your job of upgrading each pcb that much easier!


If you have a special request for a kit, such as audio circuit capacitors only, audio circuit transistors only and the like, please contact us, we are VERY flexible with what we can supply for you!

See contact form below, thank you.

The PR99MKII kit covers the following pcb's:


- Power Supply                                            - Reproduce Amplifier
- Capstan Speed Control                            - Output Amp
- Fader Control                                             
- Input Amplifier                                          
- Locator Command
- Locator MPU
- Record Amplifier
- Oscillator

- Tape Drive Control

The A77 DOLBY B kit cover the following pcb's:


- Power Supply                                 - Oscillator, 2 or 4 track

- Record Relay                                  - Reproduce Amplifier
- Speed Control
- Switchboard
- Drive Control
- Input Amplifier
- Record Amplifier
- DOLBY Record Processor
- DOLBY Playback Processor
​- DOLBY Interconnect pcb

An important note regarding the trimmer pots.
In order to ensure that your Revox will operate correctly and to specifications, if you do decide to replace all the trimmer pots, you will need to completely re calibrate your deck according to the Revox's service instructions. This is quite involved and requires specialty test equipment as well as a suitable calibration tape. This IS NOT recommended for the first timer or novice!
At the VERY LEAST, what you could do is, as you remove each trimmer, take a resistive reading of its setting, then adjust the replacement trimmer to the same value before installing it. This should get you fairly close to the required setting, but is not a guarantee that your Revox deck will be calibrated to factory specs!
If you are not sure about the trimmers, it may well be OK to leave the original ones in each pcb, and just replace the capacitors and if you wish, also replace all the transistors.


A77 MI-MKIV; this kit covers all sub models. Kit WITH transistors:  $99.50                

 

A77 MI-MKIV; this kit covers all submodels. Kit WITHOUT transistors:  $89.00

 

A77 DOLBY B version; Kit WITH transistors: $112.00

 

A77 DOLBY B version; Kit WITHOUT transistors: $99.00

 

A700; Kit WITH transistors: $172.00

 

A700; Kit WITHOUT transistors: $152.00

 

B77 MKI & MKII; this kit covers both submodels. Kit WITH transistors: $129.00

 

B77 MKI & MKII; this kit covers both submodels. Kit WITHOUT transistors: $115.00

 

PR99 MKI; Kit WITH transistors: $136.00

 

PR99 MKI; Kit WITHOUT transistors: $127.00

 

PR99 MKII; Kit WITH transistors: $175.00

PR99 MKII; Kit WITHOUT transistors: $164.00

 

PR99 MKIII; Kit WITH transistors: $165.00

PR99 MKIII; Kit WITHOUT transistors: $147.00 


 

 

Shipping of $15.00 will be added automatically and is for the lower 48 ONLY. All other areas, please contact us for additional shipping fee.

For multiple orders, we will refund your excess shipping cost!

Each kit will replace all electrolytic and tantalum capacitors, (tantalum caps are replaced by electrolytic's!), X2 type safety film caps, motor start/run film caps, all trimmers, and if ordered, all audio and power transistors.

Each kit will also have a basic 'how to' manual, including how to ID color coded Tantalum capacitors and their correct polarity orientation.

The B77 MKI & MKII kit covers the following pcb's:


- Power Supply
- Tape Drive Control
- Tape Move sensor
- Capstan Speed Control
- Input Amplifier
- Record Amplifier
- Oscillator, 2 or 4 track
- Reproduce Amplifier
- Monitor Amplifier

Revox R2R Upgrade Kits

See important note below re your A77!

The A700 kit covers the following pcb's:


- Power Supply                                               - Reproduce Amp
- Capstan Speed Control                               - Sensor pcb right
- Tone Control                                                - Sensor pcb right
- Interconnection pcb                                    ​- Tape Transport Control
- Relay pcb                                                      - Variable Speed Control
- Head Phone Amp                                         - VU Meter Amp
- Oscillator                                                       ​- Spooling Motor Control
​- Input Amp
- Record Amplifier