Mids in tone stack, very little change

[gkwallace]

Just finished my first build and nothing went up in flames!
My middle knob in the tone stack makes very little difference in tone
I've included a pdf of my tone stack

thanks for the help

tone stack.pdf

[crgfrench]

Your treble control has a slightly lower than normal frequency cutoff due to the 500pF cap which is higher than the 470pF Marshall or 250pF Fender value. Also your mid has a higher than normal frequency cutoff due to the 0.01uF cap which is lower than the 0.022uF Marshall or 0.047 Fender value.

It could be your treble control has more effect relative to the mid control because of this. I would try an 0.022uF cap where your 0.01 cap is first and see if that helps. Then maybe replace the 500pF cap with a 470pF or lower value.

[gkwallace]

Your treble control has a slightly lower than normal frequency cutoff due to the 500pF cap which is higher than the 470pF Marshall or 250pF Fender value. Also your mid has a higher than normal frequency cutoff due to the 0.01uF cap which is lower than the 0.022uF Marshall or 0.047 Fender value.

It could be your treble control has more effect relative to the mid control because of this. I would try an 0.022uF cap where your 0.01 cap is first and see if that helps. Then maybe replace the 500pF cap with a 470pF or lower value.

Thank you. Makes perfect sense.

[crgfrench]

Also maybe just double check that you used linear pots for the mid & treble. And log taper for the Bass.