[Boatanchors] Hammarlund HQ110A Selectivity control failure

[Howie WA3MCK]

Gangue,

The on/off section of my selectivity control failed on my HQ110A

It’s R12 on the schematic  - 10K with tandem switch S1.
Part # K15378-4

Easy enough to replace or buy online but I need to know if this a linear or
log pot.

I don’t want to remove it until I have a replacement in hand.

Anyone have one to share/sell/trade and or advice?

Tnx de Howie WA3MCK