It is common design practice  overrunning output valves. It is done with all types . There are some amps that use EL34’s and run them way over 500 volts. This…

Many amps have a valve rectifier valve. Typical types are EZ81, 5Y3, GZ34/5AR4 and 5U4.  There are variations on the letters at the end of the part number but the…

I thought it worth the time De-Mystifying Sovtek 12AX7 WA WB WC Variants. Why are there three versions of the Sovtek 12AX7 and what use one versus the other? One common…

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…

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…

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…

There is a lot of confusion in the market on Svetlana and Winged C Valves.   A number of UK suppliers claiming they are selling current production Winged C valves which are…

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 :-…

I was repairing a Bugera 333 amp which was really badly crackling.  Taking the back off the amp revealed cooked EL34’s. This is a 120 watt combo amp.  A gigging…