Tube Amp Archive

i have also looked at the 5879. I was "trying" to build with all current available tubes. But for sure ok with the 5879. I was planning on running the pentode with lower gain to reduce microphonics potential i.e. similar gain to 12AX7. Would a standard 12ax7 front end be better? 12ax7 -> 12ax7 CF ->...

Hi all! A little about my background: Building audio related things for last 30 years (on and off). Speakers, hi fi audio amps (tube mostly 6B4G SE / PP), a couple of small guitar amps based on schematics, and a couple based on just basic guitar amp building knowledge. I do have a full set of test e...

not necessarily the EF86. I was trying to use tubes that are currently in production. But I am open to the 5879. I have also seen many examples using that tube.

Hey everyone! Been a lurker here for a while. I have found that this forum has tons of useful information about design, tubes, guitar amps etc. A wealth of knowledge. Anyways, I have been interested in tube circuits for the last 20 years. I have built some Hifi amps (SE and PP) plus 3 guitar amps. A...