That should work. Maybe not ideal
(carbon pots can get "noisy", but should work because input is
filtered.
Did you try to measure it as I outlined?
Another place to measure it would be on EC2 J1 pin 26: MixV. (look
in your manual to make sure that's the pin).
Again, with EC2 powered, you should measure 0 to 5 volts as you
turn the potentiometer through its range.
Finn
On 11/17/2020 1:12 PM, David Leonard
wdleonard@gmail.com wrote: