I have an old echoplex tape delay that works except for two problems.
There are two pots on the front, one labeled ECHO Sustain with the numbers 1-9 marked out. It should raise the number of repeats from 1 repeat to 9, except it stays at 1 repeat through the entire range of the pot. Does this sound like a problem with the pot, some circuitry in the delay, or a mechanical problem with the delay?
The other problem has to do with the other pot on the front labeled ECHO Volume. This pot should in theory raise the volume level of the delay through it's range. But it currently stays at a constant very quiet volume from 1-8 and just after 8 the volume of the echo gets a bit louder bit your guitar volume rolls off completely. Again does this sound like a problem I could fix by replacing the pot?
EDIT: Ok I just found a schematic and I know they are 500k pots, and I have some on hand, but I'd rather not just solder one in to see if it works because there are a good 4 wires coming off of each lug so it will be a pain.
here is a link to a schematic link
Here is a picture of it.