6922 preamp idea

[RevMen]

I would like to build a line stage preamp using a pair of 6922's and as few parts as possible. This is my second attempt at creating a circuit like this. I think I've got it, but of course it would be wise to get some more knowledgeable people to view it before I build it and subject it to high voltage.

So does this make sense, what I've done? I've attached the schematic and the load lines for both stages.

 

[kenpeter]

The grid voltage is usually lower than the cathode.
As you show loadlines with negative grid bias, I'm
assuming you knew what you were doing and must
have mixed up the drawing.

 

[RevMen]

Rookie mistake. Thanks for pointing that out.

121V should be 111V. That actually makes 27k the exact right value instead of the closest value, so that's good.

I've attached the fixed schematic.

 

[TonyTecson]

you can read upon Broskie's CCDA......CCDA: constant-current-draw amplifier

i do no think you really need that high a B+, from 100 to 200 volts is plenty....better to keep the plate voltage at 90 volts max...

 

[Bonsai]

Should this not be in the tubes section?

 

[TonyTecson]

thread moved....

 

[Shoog]

I would replace the 16K resistor with a DN2540 configured as a CCS.

Shoog