enthalpystudios
Well-known member
i've been mulling things over in my head about a tube preamp using the ef86 and 6sn7 tubes that I have around.
because of (although untested by my own ears) reportedly poop distortions of the ef86 connected as a pentode, i'm told that it does ok as a triode.
what about as pentodes in pushpull? would it not then cancel out some of those distortions?
i'm trying to think about a different output stage since I don't have an output transformer suitable for the 6sn7's plate resistance.
I'm shooting for fairly high gain, 70-80ish total, probably 8-14 db of transformer gain, after factoring in both input and output transformers.
i just want one channel of it, and i have a 4 6sn7's and 2 ef86's to throw at it.
also, can some resistors be used to fake a centertap on a mic input transformer secondary to feed pushpull grids? or is this more of a trick suitable for heater taps?
thanks for humoring the tube noob questions.
billy
because of (although untested by my own ears) reportedly poop distortions of the ef86 connected as a pentode, i'm told that it does ok as a triode.
what about as pentodes in pushpull? would it not then cancel out some of those distortions?
i'm trying to think about a different output stage since I don't have an output transformer suitable for the 6sn7's plate resistance.
I'm shooting for fairly high gain, 70-80ish total, probably 8-14 db of transformer gain, after factoring in both input and output transformers.
i just want one channel of it, and i have a 4 6sn7's and 2 ef86's to throw at it.
also, can some resistors be used to fake a centertap on a mic input transformer secondary to feed pushpull grids? or is this more of a trick suitable for heater taps?
thanks for humoring the tube noob questions.
billy