I'm cleaning up a friend's preamp and need to replace a pot. It's a Clarostat, the back is stamped:
Alembic
475-001
20 9818
Mexico
I'm replacing because it tested linear from 0-380kOhms (1-8 on dial) then dropped sharply toward 0 (from 8-10). Based on that line's trajectory, I'm guessing it's a 500k pot, but if anyone could confirm that would really set me at ease for replacing. Also, by any chance does anyone have a wiring diagram so I don't have to decode resistor bands to test everything? Thanks so much!
Alembic
475-001
20 9818
Mexico
I'm replacing because it tested linear from 0-380kOhms (1-8 on dial) then dropped sharply toward 0 (from 8-10). Based on that line's trajectory, I'm guessing it's a 500k pot, but if anyone could confirm that would really set me at ease for replacing. Also, by any chance does anyone have a wiring diagram so I don't have to decode resistor bands to test everything? Thanks so much!
That is strange.
I would have expected high (infinite) resistance from a broken track or lifted wiper.
I would have expected high (infinite) resistance from a broken track or lifted wiper.
The preamp is an Alembic F-1X. I found a hand-drawn diagram here:https://www.diyaudio.com/community/threads/alembic-f1x-schematic.327261/
The pot is a Clarostat 475-001. Assuming that diagram's right, it's a 1M. I guess I'll just try to match the dimensions as best I can to a 1M pot available on Mouser...
The pot is a Clarostat 475-001. Assuming that diagram's right, it's a 1M. I guess I'll just try to match the dimensions as best I can to a 1M pot available on Mouser...
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