Recent content by rtch

"I recently had my '86 Greco VB50 converted to the MASTER VOL / BLEND / MASTER TONE arrangement. This not only sounds a TON better getting rid of all those extra switches, it makes every control way more useful - the TONE control especially so - even with it all the way off I can still get...

Wow, thanks for the adventure story, particularly the final chapter. I've just bought a new Chinese violin version, and am still trying to figure out the controls, but your final post will help a lot. I don't relate that well to wiring diagrams, I don't suppose you have schematics of the...

Thanks for that report, I only now realised that was a rather old thread. Good to hear they're still working for you, just as well I have bought a couple of the JJs. Your tech must be a bit pessimistic, as well as the zener diode trick you can add a small bucking transformer cheers

No, red-plating is due to too many watts dissipation at the plates, and is easily controlled by adjustment of the voltage of the screen grid or the control grid, or both. The problem with voltage is because of the possibility of internal arcing within the tube. A KT66 or 77 will quite possibly...