After this I decided that perhaps a single tone stack might be in order and to scrap the separate/together amp thing. I stumbled across this little gem and though ti was rather interesting.
![Image](http://amps.zugster.net/images/articles/tonestacks/garnet-schem.gif)
I found it here : http://amps.zugster.net/articles/tone-stacks
The thing that really interested me was Adams mention of a fellow by the name of Sean K that used a rotary switch to change out the tone caps. Having two holes from the previous setup struck me as a perfect use. One for the rotary switch and the other for the tone pot.
Here's the rub. I am using an EF86 input tube and have found absolutely no information on local feedback using pentodes. I assume that the setup would be very similar to the triode used by Garnet but thought it best to check with the folks here to make sure. I wasn't sure if there was anything I should pay specific attention to as far as the bias of the tube or the value of the pot etc.
Also, I was wondering which cap I would adjust with the rotary switch. The 1nf or the 1 uf. The Gibson GA30-RVT uses the exact same type of control for it's treble control and uses a .2 uf and a .02 us cap. If it's required to change them both together, it won't be a big deal, but I thought I would also check that out before I start chopping caps into this circuit.
Thanks a heap,
Cory