Cathode resistor and cap values.

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Take a 5E3 (close enough example) and do silly stuff like put a switch on the cathodes so that one channel gets 820R and 22uF while the other gets 2.7k and 0.68uF. Both channels get the standard 820R/22uF in the other position. I would think the non-tone control channel gets the 2.7k/0.68uF combination. What do you think?

And since we are doing silly stuff, how about having a cascade mode where we feed the non-tone control channel into the tone control input? Do we still give each channel the above cathode treatment or do we reverse the values? Oh, one final wrinkle, just for the heck of it we will stick a TMB tone stack in between the cascaded triodes. Which triode gets what combination? I keep changing my mind on this one.

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OK, maybe not a good description, sometimes a picture will help. Ignore the rest other than the two input triodes and it should look less confusing.



Oh yeah, the two pole three position switch at the front, sort of ignore that also.

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Did I post in the wrong section, too hard a question, schematic too busy?

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'Both channels get the standard 820R/22uF in the other position. I would think the non-tone control channel gets the 2.7k/0.68uF combination. What do you think?'
Yes, go for it. Bear in mind that there will be a big 'thump' when the switch is operated, due to the dc conditions flipping, so turn the volume down first.

'how about having a cascade mode where we feed the non-tone control channel into the tone control input?'
Give it a go; you may find you get oscillation / blocking distortion when run 'wide open'. Mitigate this by using grid stopper / smaller coupling cap / attenuation.

'stick a TMB tone stack in between the cascaded triodes. Which triode gets what combination?'
The triode with partial cathode bypass (2k7 // 0.68uF) will have higher output impedance at lower frequencies (~100k compared to ~40k fully bypassed, I think), which may affect tone control operation. So it may be better to have the fully bypassed cathode first, then the partially bypassed one.
Also partially or unbypassed cathodes tend to have a smoother tone when overdriven.
Bear in mind the inter wire capacitence on the regular / cascade switch wiring; it may cause unexpected tonal effects or oscillation.
Pete.

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That all makes sense to me, thanks.