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…

A friend has an ACOM 1000 amplifier. It is used on the HF bands( short wave bands) .  It uses one valve for the output and the valve is a…

Vox Logo image

Here are a few things to watch out for when buying second hand valve amps. Valves are very old technology and so valve amps inherit the unreliability of old tech….

valve amp internal image

While we do our day to day the day to day work, we find some interesting useful websites and some we just like..  I thought I would be brief and…

Roland MT120S Image

This post has nothing to do with valves or tubes but it is how to update your keyboard or midi player that currently has a floppy disk drive ( remember…

Electro Harmonix 12AX7

Have you ever wondered why valves wear out or why they dont last as long as solid state stuff? Why do the big amp manufacturers give you three years warranty…

EL34 II JJ Matched Quad Image

We have now upgraded all our JJ EL34 valve kits.  Our kits now include the JJ EL34 II. The reason? The JJ standard EL34 does not sound nearly as good…

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We stock EHX, JJ Electronic, Genalex, Soviet and Tung Sol valves. We ship everyday except Sundays Dismiss