Author: Stewart

VTGA-200 Power Valve Tester Topside Image

The VTGA-200 Custom Power Valve Tester

Test To The Limits, Hear Beyond Expectations Background Our goal at ValveTubeGuitarAmps has always been to deliver the absolute highest quality valves. Of course, valve manufacturers do their own quality assurance, but they’re focus is on valve production and meeting market demands. And a lot can go wrong during the manufacturing process. And nothing spoils a gig or jam session faster than a failed valve. Valves are old technology and they can hsve vague faults […]

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Kenny Hale, Huntington Beach with JCM2000 image

Exciting News for Marshall JCM2000 Owners

Exciting News for JCM2000 Owners! We are thrilled to announce the upcoming release of a replacement main board for the iconic Marshall JCM2000 amp series, including models DSL50, DSL100, TSL100, and TSL122. Why You Need This Upgrade: As beloved as they are, these amps are showing their age, and the main PCB often deteriorates due to heat. The most common issue is bias drift caused by high voltage conduction to the bias circuit, leading to

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A New version of the JJ 6V6S tube?

Some folks find they can hear the valves rattling in their 6V6S-loaded amps. Usually with specific notes. I see reports of Fender Re-Issue Princetons and Deluxe Reverbs having rattling 6V6 valves. This rattling sound does not come through the speaker but is actually the mechanical parts inside the tube which you can hear. The tube internals resonate when you play specific frequencies. As it is acoustic rattling, this effect is usually only audible in quieter

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New to Valve Amps?

Introduction If you have recently bought a new valve amp and you have never had a valve amp before, then this short blog will give you a quick understanding of the valves in your new ( or, new to you) amp. I receive a lot of messages and emails on folks who are new to valve amps. I thought I collate the common things in this one blog. I have tried to keep all the

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Unleashing the Sonic Power

Unleashing the Sonic Power: Exploring the Art of Valve Rolling for Guitar Amps Introduction: Valve guitar amplifiers have long captivated musicians with their distinctive warm tones, rich harmonics, and organic response. Central to their magic are the valves, also known as vacuum tubes, which play a crucial role in shaping the amp’s sound. If you’re an owner of a valve guitar amp, you may already be aware of the potential for tonal exploration through valve

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The Truth About Valves

A few weeks ago, I had a chat about the valve market with Cliff Brown of 633 Engineering. Some really cool amps from this leading UK bespoke amp manufacturer. 633’s amps are the culmination of Cliff’s rich experience, having designed mixing desks and valve amps for household-name manufacturers. We chatted about the valve market under the banner “The truth About Valves” and Cliff recorded the discussion. Lots of inside knowledge about valves (vacuum tubes for

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JJ ECC83S Comparison of Prices in the UK

Prices on everything seem to be going up. We are all suffering the effects of inflation. I thought I would make a comparison of trusted valve ( tube) suppliers here in the UK on one of the most common valves, the popular JJ ECC83S. I looked at prices on the morning of 17th September, 2023. I went through the exercise of buying one piece. In each case, I picked the cheapest option to get a

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