[Boatanchors] Rf gain Pot for SX 100 (John King)

[Drew P.]

John King wrote:
 
> I need a RF Gain potentiometer for a  Hallicrafters SX
> 100 receiver. I replaced mine with a Precision Controls mil
> spec pot and it is not the correct taper so I need one from
> a parts unit if anyone has one.
> 
> I am not sure if the RF Gain pot from a SX 99, SX 101or
> other Hallicrafters receiver of that vintage is the same as
> the one in the SX 100.
> 
> If you have a parts unit, and can part with the pot out of
> it, please email me and let me know. My discussions with
> another Hallicrafters owner/technician leads me to believe
> that the RF Gain Pot in the Hallicrafters is an unusual
> taper, NEITHER linear or audio taper.
 
<snipped>

RF Gain pots are often reverse log taper, an unusual taper indeed.
These can be hard to come by; salvage/parts unit is likely the best source.

If you are going to kluge in a pot of the wrong taper, linear will work better than audio in this application, but still not correctly.  I'm still mulling over an op amp plus linear taper pot solution to this problem.

Drew