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This is getting interesting..... because you should be able to clip meter black to ground.... meter red to the anode of D64 ..... and see that voltage change from about .6 v (one diode drop) and go up as you rotate the pot.....

When the pot is at the bottom the cathode is grounded which means no more than one diode drp at the base of TR26..... 0.6 to 0.7. With a 500 ohm pot split with a 10k resistor it won't climb a lot.... but it should climb.

Can't wait to see how this turns out....

[QUOTE="guitar_199, post: 833224, member: 18156"] This is getting interesting..... because you should be able to clip meter black to ground.... meter red to the anode of D64 ..... and see that voltage change from about .6 v (one diode drop) and go up as you rotate the pot..... When the pot is at the bottom the cathode is grounded which means no more than one diode drp at the base of TR26..... 0.6 to 0.7. With a 500 ohm pot split with a 10k resistor it won't climb a lot.... but it should climb. Can't wait to see how this turns out.... [/QUOTE]

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