Advice for gain stage and Master output with tube preamp

[fazer]

Would moving the 1M resistor to ground (R1) before the 68k change anything? If it's ok I could mount it on the input jack t save space...

Shouldn’t hurt anything and that’s how Marshall and Fenders  are set up

 

[sonolink]

Just as I thought but wanted to be sure

Thanks!
Cheers
Sono

 

[PRR]

This is all basic audio level control. Why so many questions??

This preamp can make output over 40V peak; "must" go there to get "the tone".

You can't possibly need more than 2V-3V for any next stage (except the guts of a Fender).

So you want roughly 20:1 loss.

You mention frequency response from a too-high value pot feeding a line. So don't use the 1Meg pot, that's just wrong. Even when driving just a foot of wire a 1Meg at half-gain will roll-off the top of the audio band.

The 12AX7 stage is taken from a handbook and actually aimed for a 220k load. When you figure a lot of Fenders you see that Leo knew that and often got pretty near.

220k and 10k pot is 20:1 loss and <10K line impedance for all practical purpose.

 

[sonolink]

Thanks a lot for the explanation PRR