[time-nuts] Looking for a cheap low tempco EFC pot

[Mark Sims]

The board has a place for range limiting resistors on the ends of the pot.  

In one test that I did using a supposedly very good pot, I found that the pot  did not have a balanced tempco between the wiper and the ends.  I spent a week finding that out.

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> Basically that gives me a voltage divider where the top and bottom resistors
have the same TC so the offsets pretty much cancel.