These are selected Premium Grade JJ valves that deliver superior tone, power and performance.Every valve kit is carefully selected, fully tested, digitally graded and matched before we ship to you.The best replacement valve kit for Fender Musicmaster ‘Silverface’ 12 Bass amplifiers on the market. Here you will find the answer to most questions as well as lots of hints and tips about upgrading your tubes. If you haven’t changed tour valves before please take a look at our FAQ section before you contact us. We have more than 30 years experience so we are sure we can help. If you have any questions about replacing your valves please drop us an email. This is also particularly important when it comes to the amplifier valves themselves.ĭo you have any questions about this valve kit? Guitar amps by their very nature have to be built to take a lot of knocks.
It is the balance between volume and tone that distinguishes a great valve from a mediocre valve.
Note, some versions of this amp use 6AQ5 power valves.
These superior quality valves will give you a significant upgrade in both tone and power. This replacement valve kit for the Fender Musicmaster ‘Silverface’ Bass 12 amplifier will get your amplifier sounding better than ever. Happy to post the waveform shots if they're of any use to you.Description Need a replacement valve kit for the Fender Musicmaster ‘Silverface’ Bass 12 watt amplifier? I was impressed when I first got it, but in the end after playing it a fair bit didn't like what the interstage transformer was contributing to the distortion and no complexity clean.
I also tested the OT which measured to reflect 9.55K from an 8 ohm load. Interstage transformer primary resistance was 1.9K. So the ratio of the original is more like 3:2/2 or 3:4 CT whichever way you want to think of it. It had the 6V6s for the output but I've read that ones pre-1975 had 6AQ5s with 7 pin sockets.įrom the CRO shots with the volume on '2' and 300mVpeak (not peak-peak) sinewave at the input jack, I was getting 6.1Vpeak AC at V1b plate into the interstage transformer with 4.1Vpeak on each power grid out of the transformer. It was stock (matching your top schematic) and sounded like all the clips. Timbo, I had one of these borrowed from a friend some years ago and still have all the waveform captures I took at the time as well as some notes.