Bass cut...sigh, not this again. Not pointed directly at you, Clint, but no, it is not an effing bass cut.
In a nut shell:
A regular tone control from zero up to the detent at 5, but with an 82k load. You know, stick an 82k resistor on the input of your 250k volume control in addition to the 250k tone control. This is exactly what a TBX does up the the detent at 5. At the detent the tone control goes no load, but guess what(!) the 82k resistor is still there. From the detent to up to 10 it's a 1M audio taper that gets added to the 82k loading down the 250k volume. At 10 you've got 1M and change dangling from your 250k volume, which gives you a total load of ~200k.
Where's the circuit that cuts bass?
Oh, that's right...there isn't one! :34: