Quote:
Originally Posted by bandersen
Maybe try hooking up a voltmeter between G1 and ground while you change the cutoff control and see if it's changing smoothly or jumping around.
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You got it Bob.
It is not jumpy along the way, but rather at about 7/8 fully clockwise the voltage from K to G2 jumps from a volt or so up to 430 volts. It is like turning a switch on. I guess it could be the pot broken, but I need to find a schematic. I was able to set the cutoff a couple of times, but others, and now the needle just jumps up like the voltage measurement is indicating.
I have heard that these are notorious for having bad solder connections...and as with most Sencore late model test equipment, it looks like a real PIA to service because of it's mechanical assembly.
Anyone have a schematic copy?