[R-390] OT: Need pot with piggyback on/off switch

[Scott, Barry (Clyde B)]

Anyone know where I can get a 1-meg. linear-taper pot with a single-pole
switch piggy-backed on it?  I want one with 1/4" metal shaft and 5/16"(?)
threads, not metric threads.  This is for a vintage amplifier.

Thanks,

Barry - N4BUQ