I can see at least two mistakes already
Out pin not connected, R6 should be connected to it instead of to C3, and the pot wiring is totally wrong - there should not be a trace between pins 1 and 3 - leave pin 3 not connected like in the picture on the right side !

hmmm - still using this in my two guitars - have not changed the battery as yet

make sure that you run the series tube heaters ground wire on it's own separate connection wire back to the ground connection of the AC input socket. Never mix this ground connection with the signal ground.
cheers
bajaman

very M.E.S.A like

no oscillation problem with my layout

yes

"Guys, can someone explain to me what is the need for multiple gain stages?"
answer: read the first post in this thread

try inserting a 100 ohm resistor in series with the output from the charge pump to the opamp pin 7, and then connect a 220uf (at least 35v) capacitor from pin 7 to ground
cheers
bajaman

anyone tried my SUGGESTION yet ?

"Here’s some one that has done a proper blind test on tone controls

https://youtu.be/817JHiYV_Po"

totally irrelevant to this thread

Please read the first line of my original post and contemplate why I was reticent to share my subjective observations - as Thomas said to Jesus "show me the holes - i want proof"
None so blind as those who will not see, and none so deaf as those who will not hear
cheers
bajaman

Has anyone actually tried my suggestion yet ? I would very much like to hear from you. As I previously stated - I am not interested in proof, recordings measurements etc. If you decide to ACTUALLY TRY my suggestion (with a clean not over distorted signal) then I would be very pleased to hear your th...

Yesterday I had two Fender amplifiers in the workshop - a Hot Rod Deluxe and a Hot Rod Deville. I changed the first 22n capacitor after the input stage in both amps - used a TAD 22n mustard and the results were not subtle - I had the customer watching me for the Deville - first i played my strat int...

you are doing something wrong if it distorts

It sounds like the buzz noise is from single coil unshielded pickups - otherwise it sounds great
cheers
bajaman

Also, if you can hear it, then you can definitely measure it. So swapping caps and doing some frequency spectrum analysis should clearly show up differences. Please feel free to do so with the suggested 22n TAD mustard capacitor versus a generic reddish brown chinese 22n 630v polyfilm capacitor wit...

I just listened to the video. I could hear differences between the different caps, though they were subtle. Well - i could not hear any difference at all because they all sounded distorted :lol: Perhaps if he had compared any cheap Chinese 630v polyester capacitor with the SPECIFIC Tube Amp Doctor ...

I'm not saying you are, but they exist.

yes - agree - we do exist.

completely missing the point - but hey, that is exactly what i expected, so more fool me for actually suggesting it - just by chance has anyone tried using a philips or mullard mustard capacitor OR a TAD mustard capacitor ?
AND - try using a CLEAN tone not distortion
cheers
bajaman

yes - i have heard good reports about those sozo capacitors as well. I will order a few and give them a try too. no need to go crazy replacing all the coupling capacitors though, as in my experience it is that first coupling capacitor after the input tube that makes the most difference to the "sound...