Sovtek EL84 Matched Pair

Many folks ask what the difference is between the standard EL84 and the more expensive¬† Sovtek EL84M. There has been no data available and I see lots of questions on…

Following our blog on testing the 6L6 and the El84, we have now done a burn test on a JJ El34. ¬†The test got delayed as our Avo Mk2 tester…

JJ ECC83S

I was curious to see if there was any information on the net regarding the noise figures for any noise measurements on preamp valves Noise is just one of the…

Different ECC83 12AX7 image

There are many types of pre-amps around all with the same pinout and if you are not a valve geek like me then how do you work out what is…

Having done a long term test on a JJ Electronic 6L6, and saw that the cathode current remained rock solid over over a period of 48 hours the next valve…

A number of valve sellers offer output valves that are “burned in”. Burning in valves means basically running them for a number of hours. It is claimed that the benefit…

A very sick Mesa Boogie Caliber DC 10 amp arrived for me to have a look at. Our first Mesa Boogie Amp repair. ¬†This one had one dead channel and…

Tung Sol 12AX7 / ECC83

A really neat added value benefit of using Tung Sol valves in your amp is their low microphonics. ¬†During testing at the factory Tung Sol Valves are tested on a…

Sovtek EL84 Matched Pair

Here is a customer’s feedback on replacing the EL84’s with Sovtek EL84’s. ¬†I have only removed the customer name I promised you an update on the Sovtek EL84 ¬†valves and…

Customer Reviews


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"It looks to be a very quality product. Super fast international shipping at a great price." - US customer G.bought our Marshall JCM2000 Stable Bias boars on 18th November 2020

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"Perfect as usual !" D.C. Bought Genalex preamp valves on 21st November 2020

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