First tube amp build - not going too well..

[disso]

super, yep take the rectifier return current to the ground of the first cap - star grounding is a simple way of enforcing this rule stopping this current entering the signal wiring. Maybe have a go at building something a little bigger. Your circuit has two first stage amplification - so quite a lot of gain, one stage may have done.

Yep, well in the meantime the circuit has changed quite alot, i now use E83F's in triode mode driving the EL34's. this has turned into an amplifier that i just try different designs and experiment on. Using both sections of the 6N1P was too much indeed, the amplifier started to distort at 40-50% volume.

I will have a go at something bigger in the future yes, i have some GM70's laying around 😛

 

[OldHector]

...
Now you say you turned to a pentode as driver tube, just for sake of information is there any particolar reason to the E83F? I know few other projects running with the EF86, but it differs from yours that seems to be a variable mu tube

E83F Triode data

I think there is a misconception that all odd numbered tubes are vari-mu. As far as I know E83F is not related to EF83, and is not remote cut-off.

 

[indaco]

Yes, indeed at first glance it's as you say...it seems more than an acceptable tube for the purpose