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…

Marshall JCM2000 DSL Image

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…

Our task was to renovate a June 1973 Marshall Model 1959 Super Lead 100 watt head It had been modified in the 1990’s to use 5881 output valves. This was…

A Marshall JCM900 Breaking Valves was the cause of this amp’s failure. It travels around a lot and it has the original 1990’s valve retainers on the output valves. The…

Marshall JCM900 Chassis image

A Marshall JCM900 100 Watt Combo  arrived in the workshop.  This version is the 4102  It was very poorly. The first issues seen were : 10 amp fuse in the plug!!…

Marshall JCM2000 DSL amp image

The early (1997-2003) Marshall JCM2000 DSL50, DSL100, TSL100 and TSL122 amps are often troubled by an unstable bias (drifting bias). These are nice amps and I have one myself This…

Here are Things learned about Valve Amps in 2018 . They are in no particular order. Perhaps some useful info about your amp. I thought I would share them before…

EL34L JJ Matched Quad Pack Image

We have broadened our range of EL34’s in our store. But which one is best for my amp? This is a handy quick guide to EL34’s We now have :-…

A Marshall JCM900 amp arrived.  The JCM900 combo is basically a 100 watt twin 12 inch speaker combo and is a true Marshall stack in a matchbox. Nice and easy…

Customer Reviews


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"Very smooth, quick and friendly Yorkshire transaction. Amp sounds the best it's been for years!!" - R.M, bought a matched pair of EH EL34 on 6th October 2020

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"Great advice and quick service" R.W. bought Tung Sol EL34B's 13th October 2020

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