Vox AC30CC1 image

Vox AC30CC1 a simple fault to watch out for

  Vox AC30CC1 a simple fault to watch out for This Vox AC 30 model is a lightweight one speaker version and the speaker is a special light weight design.  The amp circuitry is the same. Its big disadvantage is no lovely Alnico Blue speakers  The owner reported the amp as sounding weak and intermittent. I played detective and asked a number of questions. When was the amp last used? It has not been used

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Fender Blackface Deluxe Reverb 1966

Fender Blackface Deluxe Reverb 1966

Summary of this amp A lovely Fender Blackface Deluxe Reverb 1966 came to us. It was extremely noisy and the reverb was crackling and popping. It was a USA 110 volt AC model and so used a step down transformer to enable it to run in the UK on 230 voltsThe amp was all original apart from the power supply capacitors and the choke having been changed. It is very unusual ( at least to

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Getting that Superb Fender Tone

Getting that Superb Fender Tone Blackface and Silverface Fender amps were renowned for their clean sounds which moved to nice gentle bluesy break up when pushed hard.   How did they achieve this? Fender chose their valves/tubes carefully to produce this wonderful palette of  sounds that players just love. If you are  country or blues player you are in heaven with these old amps. They command high prices for good ones especially  from 1963- 73.

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Marshall JPM50 Re-Commission

  A Marshall JPM 50 arrives in the workshop.  This blog covers this  Marshall JPM50 Re-Commission. This Marshall  JPM50 Amp is from the classic era of pre-1973 Marshall amps. It is therefore highly desirable when fully operational.   The Marshall JTM50 on its last period of production, was re-branded as the Marshall JPM50. The amp went though final test at Marshall on 13th June. 1972. This is the highly desirable lead model from one of the

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Marshall JCM2000 DSL Image

Marshall JCM2000 DSL Hum Solution

Marshall JCM2000 DSL100 Hum after warmup fix   There are a couple of key problems with the Marshall DSL can TSL series printed circuit boards.  One is the drifting bias due to board leaking current.  This causes the EL34 output valves to overheat,We sell  Stable bias board kits for  the DSL and the TSL amps which cures this problem   In addition to the bias drift issue in the DSL 50 and 100, TSL401 and

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EL34 II JJ Matched Quad Image

How to make a 100 watt amp less loud

Folks ask me about how to make a 100 watt amp less loud. They want the amp  “singing”  but they need to have the output valves starting to clip and this means LOUD. Usually they are amps with outputs north of 60 watts. Exceptions are Vox AC30’s which are 30 watts.  The discussion here is focused on amps that four or more output valves. First thing to keep in mind is that a 100 watt

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