Tube Amp Archive

I'm not new but don't post much here. Trying to learn a bit more and venture here more often. Watch & go to football, baseball, & basketball games. Play golf, surf, sail, fish, camp, garden (plumeria cultivars), bike, wood work, RC planes, read, reefkeeping, traveling, concerts, and love good beer &...

The local NFB is is going to cancel a certain amount of freq's and lower some gain from that third (or second from the low input) cascaded stage and also act a little bit like a snubber which should help also minimize parsitic oscillation after 3 gain stages. The 100k resistor before the 4th stage w...

I can see why you wouldn't want to unplug and re-plug speakers in while the amp is on & playing but if you have a simple A/B switching box (w/ two different 8 ohm speakers for example), what's the harm in going back and forth btwn speakers to hear the subtle differences btwn them? I do this all of t...