How to adjust the bias of an amplifier

Tips & tricksSome tube amps, like the Fender Silverface Princeton Reverb, do not have a pot to adjust the bias. Several times, I read in forums, that you can simply change the tubes without the need for a further fine-tuning of the bias.
Actually, this is wrong. Continue reading “How to adjust the bias of an amplifier”

Fluctuating mains voltage = different sound?

Ask the DudeAlmost every guitarist knows this phenomenon: in the rehearsal room the sound of the guitar was absolutely perfect, and the amp has been situated right in the sweet spot. But live on stage, the magic has disappeared. Continue reading “Fluctuating mains voltage = different sound?”

How a tube-amp works – Part 1

RöhreTo me as a layperson the functionality of a tube-amp is a phenomenon and because of this fascination I decided to deal a bit more intensively with it.

Here I would like to explain (maybe some kind of inexpertly) try to explain how a tube-amplifier with cathode-bias works: Continue reading “How a tube-amp works – Part 1”