5E3 tone pot strange behaviour

[Bluefinger]

Hi,

On my 5E3 the tone pot is acting funny: turned down all the way it rolls off all the highs as expected. At about "8" it has it's brightest setting. if I go up to 12 it loses some high end again but a mid boost sets in. Any explainations for this?

To brighten up the normal channel a bit I used a .022 coupling cap there but I left the .1 on the bright channel. Since the channels are interactive, could this coupling cap mismatch cause this?

thanks!

[pdf64]

Any other mods? eg 12AX7 in V1.
Yes I know everyone seems to use a 12AX7 but it's a much higher gain tube than the stock 12AY7 and weird things can happen with high gain.

[Bluefinger]

No, I have a 12AY7 in V1. No other mods apart from the coupling cap value

[pdf64]

OK, sorry.
Is this the same over the control range of both channel volume pots?

[TimmyP1955]

Hi,

On my 5E3 the tone pot is acting funny: turned down all the way it rolls off all the highs as expected. At about "8" it has it's brightest setting. if I go up to 12 it loses some high end again but a mid boost sets in. Any explainations for this?

Does the position of the other channel's volume control affect this?