This Fender Blues Junior valve kit contains three Sovtek 12Ax7WC’s and two Sovetek EL84M ‘s.
This is an excellent upgrade kit for a Fender Blues Junior amp
The Sovtek 12AX7WC is a higher gain valve. It is a lovely balanced tone pre-amp valve and has reputedly the lowest microphonics of any of the Russian manufactured 12AX7 types. The “W” denotes that the valve is ruggedised giving you a valve that has the endurance for combo amps.
The Sovtek EL84M is a ruggedised valve and is slightly wider than the standard EL84 . The “M” stands for miltary as it is a ruggedised long life valve. It will last 2-3 times longer than any standard EL84 and it will produce 2/3 more watts per valve. It is good for increasing headroom on 15 watt amps. You will have a bit more volume before the amp breaks up
We use our SUPERMATCH process to match the EL84’s and we supply a matched balanced 12AX7WC for the phase splitter position
You will receive a test certificate showing the matching info. Valves are made in Russia and tested to US Dept of Defense standard 133 Revision D at the factory. We also test them on our Avo testers.