A50 & A78 AMP & B225 CD Upgrade Kits

the capacitor pcb mounted on to that aluminum plate

The capacitor pcb with the original balancing resistor soldered to it.

​Note how each solder pad has the wire color screen printed next to it.

The capacitors are mounted on the under side of the pcb.

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.

OUR UNIQUE POWER SUPPLY CAPACITOR PCB

To make the job of replacing those four large power supply capacitor neat and easy, we designed a simple printed circuit board to which the four balancing resistors and the four large power supply caps are soldered to, then all the wiring from the original caps can be neatly soldered to this pcb. The pcb pads to which all the wires connect to has each wire color screen printed to it so that there is no mixup or mistake.

This capacitor printed circuit board, once all the components are mounted and soldered to it, is then attached using 3M double sided industrial strength tape to the same plate where the original power supply capacitors were mounted to.

And there is no worries, the 3M industrial double sided tape is VERY strong, that pcb will the caps and resistors on it WILL NOT come loose!

The B225 kit covers the following pcb's:


- Data pcb
- Decoder pcb
- Microprocessor pcb
- Servo 1 pcb
- Servo 2 pcb

The 3M industrial double sided adhesive tape fitted to the capacitors

A50; Kit WITH transistors & cap pcb:  $89.50                

 

A50; Kit WITHOUT transistors & cap pcb:  $69.50

 

A78 and all sub-models; Kit WITH transistors & cap pcb: $95.50

 

A78 and all submodels; Kit WITHOUT transistors & cap pcb: $75.50

 

A50 & A78 power supply capacitor printed circuit board: $25.00

This is for those who do not wish to buy the whole kit. This DOES NOT include the capacitors


A50 & A78 power supply capacitor printed circuit board: $48.00

This is for those who do not wish to buy the whole kit. This INCLUDES the 4x 5600uF 50V capacitors


B225; Kit WITH transistors: $59.00


B225; Kit WITHOUT transistors: $47.00 

 

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 you excess shipping cost!

The completed installation. The wires are trimmed as most are too long. Neat and clean, EASY!

The aluminum plate to which the original caps were mounted to

The A50 kits cover the following pcb's:


- Power Supply
- Tone Control
- Input Stage
- Filter Stage
- Switch
- Output

The A78 kits cover the following pcb's:

- Power Supply
- Tone Control
- Input Stage
- Filter Stage
- Switch
- Output

Each kit will replace all electrolytic and tantalum capacitors, (tantalum caps are replaced by electrolytic's!), the large power supply capacitors, 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.