Long-tail pair phase inverter
Moderators: pompeiisneaks, Colossal
Long-tail pair phase inverter
So I'm looking for offbeat design ideas to get away from 12ax7/12at7 tubes. I've got a few 12sc7 tubes kicking around and I was thinking about using one for a phase inverter. I know it was common to use it in a paraphrase arrangement (the 6sc7), and with a single cathode it's not possible to do a cathodyne inverter, but has anyone seen one used in a long-tail pair arrangement? Seems possible to me since the ltp has the 2 cathodes tied together anyway.
"Dime the controls, tune to drop D and flog the strings like they were naughty,"
Re: Long-tail pair phase inverter
Yes, you can use it and it will work fine.
Being on the "not often seen in guitarland" scenario, you can also use a simple CCS from the common cathode to a negative voltage (obtained from raw bias) and avoid a coupling cap from the tonestack to the phase inverter.
Target twice the current of each triode, and keep the two plate resistors the same.
Being on the "not often seen in guitarland" scenario, you can also use a simple CCS from the common cathode to a negative voltage (obtained from raw bias) and avoid a coupling cap from the tonestack to the phase inverter.
Target twice the current of each triode, and keep the two plate resistors the same.