Amp Valves

Valve Suppliers and Resellers, make sure you know the market

Valve Suppliers and Resellers (see note) When your amp needs new valves no doubt you will read the reviews of all the differing  manufacturers of amplifier valves and what they have to offer. It appears that there are loads of different manufacturers but in fact there are only three main manufacturers on the planet. There are a few other specialists  but they make so few and mostly for high end HiFi. The companies that own […]

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Typical Phase Splitter Schematic

Phase Splitter Valves they do influence your amp tone

The phase splitter valve while it is a pre-amp type valve is really not part of the pre-amp chain at all. It is actually part of the output stage.  When an amp has two or more valves then it operates in a mode called push pull. Its  job is to invert the signal so that one of your two output valves is driven at any one time. This is a an oversimplified description but I

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Ampeg B200R a Sad Tale…maybe you can advise us?

We were asked to have a look at an Ampeg B200R bass amp.  This is a Chinese built amp and is known to have a few challenges. Faults include badly fitting chassis in the case resulting in the chassis being damaged and known to fail when the speaker is switched from ” no horns” to “horns” jack socket. This failure mode is caused by the panel which is mounted in the chassis with the speaker

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Orange Rockverb Amp Repair

Unexpected Valve wear in an Orange Rockerverb 50 MkIII

Over the weekend I had the pleasure of  doing a quick service on and Orange Rockerverb MkIII.  The amp is just coming up on two years old and gigged at least every week. The owner reported that the amp was creating murky distortion and it sounded so horrible it was no longer useable. So this amp is experiencing a lot of lugging around and used at giigs lasting 3 hours or more.  He was leaving

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Ashdown Evo II 300

This is essentially a solid state amp so before I get shot down in flames, my defence is that there is one valve in this amp which is there to warm up the sound. This Ashdown Evo II 300  is a 300 watt amp with twin 12 inch speakers. It is very well constructed with great access to the key parts of the amp This Ashdown Evo II 300 was distorting and sounded terrible. When

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