Tube Amp Archive

Well, I am interested in 7189s running at higher voltages - I don't think there's much to be gained from using 7189s in regular EL84 amps beyond tube longevity (not neglible, I know). But the 7189s can put out significantly more wattage than the EL84s if the amp can give them the voltage and current...

Bob S wrote:I've tried 7189's in a Liverpool (around 375 - 380v on the plates) & it sounded great.
Like Zippy said, you might need to adjust the dropper string a little.
The Russian 6P14P's are also like 7189s - they can take a beating.
It will be LOUD.

EXCELLENT, Bob! Thanks!

Thanks, Zippy. I've built nine or ten amps so am not completely new to the game, but I have been out the loop for some time and am having to get up to speed. That thread is interesting, but it's going to take me a while to get through it - it's a long one. The Rocket doesn't seem to have anything es...

Hi, folks, first post here. I have an old Fisher stereo amp that has some problems but has good PT and OTs. I can't find a buyer for it so I am considering building something with it - probably multiple amps, given that there are two OTs here. Anyway, it occurred to me that I could use the PT with a...