Sorry for all the questions, as I said before, "I ain't no engineer"... lol
Any way, here is my current plan for the next step of mods on this amp (added the 500k volume in place of R15 and R27). The amp is still too loud, so I want to make the following changes:
R10 - 68K (still debating this)
R13 - 150K
R14 - 68K
and add 27K in series with CW-1
The rest of the circuit around the op amp remains unchanged. What are the effects of these changes on the frequency of these circuits specifically, will/should I need to adjust the values of any of the 4 caps (C21, C24, C26, and C27) to keep the frequency response (for the most part) unchanged (I don't mind if it gets a little darker, just not brighter).
By the way, jim, I am thinking about your suggestion on changing C1... Undeceided as yet. Thinking about a switch to swap 2 or 3 different cap values there. Still may remove the op amp altogether in favor of your "straight to the 1st triode" with the high freq. emphasis circuit.
"...and I am outta here!"
Scott
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Dean EVO Exotic Burl, EVO Special, Vendetta 1000 FR, Stagg Les Paul copy, Squier Standard Telecaster, Squier MIK Stratocaster
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