2 channel single ended

[H Chandler]

I am thinking about building a 2 channel single ended amp using a power section like

http://annex.ax84.com/cliffc/amps/AX...0Schematic.pdf

For the preamp section I would like to use something like the bassman normal channel. See attachment. I want each channel to have its own vol/treb/bass controls and can only use 2 preamp tubes.

Will I simply be able to tie two of these channels to the grid of the power tube?

This is for a clean sounding amp so I don't need a lot of gain.

Has anyone done this already or know of an example?

Thanks,

Howard

[H Chandler]

Well ...

Come on ya'll. Is this so stupid that you're being polite and refraining from comment? I realize I've oversimplified the question.

Sure, I will have to decouple the stages, and I will probably have to fiddle with the mixing resistor values. So, please don't hesitate to chime in and admonish if this is a totally stupid idea. Will I be able to get enough gain to drive a KT-88. I'm also considering doing a parallel 5881 sort of thing. What do you think? I can take it.

Thanks,

Howard

[Bruce / Mission Amps]

Yes, as long as you keep the two 220K mixing resistors in place and use a .0022uF to .022uF coupling cap in front of the grid of the power tube.
The power tube will need it's own grid load resistor after the coupling cap.

[H Chandler]

Thanks for the sanity check Bruce. Hows the new digs?

[Bruce / Mission Amps]

Been a tough move but things are starting to come together.
I pulled out, resorted and put up in bins about 1200 vacuum tubes today and still have a few large boxes with hundreds left to do.
I just got another 20 tweed cabinets in and have about 25 of the 18w and 35w Aurora cabinets due in mid December so I still have some house keeping and cleaning to do.

Bruce

[bsmco]

ever finished?

I would like to see the final schematic of this amp if it was finished. I am thinking of adding a 2nd channel to a vjr.