Custom Circuits Ltd

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Services available

Custom Circuits Ltd can carry out the following services (but if there is anything else you can think of, just ask)

Fault diagnosis and repair of;

  • Guitar amps
  • PA amps
  • Mixers
  • Pedals
  • Speaker cabinets
  • Guitars
  • Lighting
  • keyboards

Modification, testing and replacement

  • Tone stacks
  • Valves, complete with biasing (where applicable)
  • Capacitors
  • Control pots
  • Wiring
  • Connectors
  • Transformers (custom rewinds available)
  • All other components (including surface mount)


Examples of recent design work are shown below. These range from Power Supply and Ethernet switching for sonar equipment to signal level convertors for the process industry to guitar pick-up preamps with active tone control.

Anything else?

This is not a definitive list by any means. If there is anything else you may require, just ask. We know plenty of local, skilled craftsmen who can make and repair just about anything. This may be speaker cabinets to sheet metal work. We can also source difficult to get components or design in substitutes. Sometimes even when you think something is beyond repair, it may still be possible. Take the Fasel inductor in this Cry Baby pedal for example.

New Workshop

A new development this summer (2014) has been the building of a brand new workshop. This has dramatically increased the space available enabling the set up of separate build areas and electronics benches. There is now a bench for heavy items such as valve amplifiers and cabinets plus a bench dedicated to electronics design, development and test. Lack of storage space is also now a thing of the past.