[Hammarlund] SP-600 IF Gain

[Russ WQ3X]

Hi Joe -

You can first try spraying it with some lube especially made for pots. Just 
get some what is now called Fader-Lube - made by Caig Labs, the place that 
created De-Oxit. I use a lot of it for guitar amp pots and I find it works 
very very well and unlike their De-Oxit product it leaves lubrication behind 
after it evaporates.

Russ WQ3X


----- Original Message ----- 
From: "Carole White-Connor" <carolew at bellatlantic.net>
To: <hammarlund at mailman.qth.net>
Sent: Wednesday, April 04, 2007 7:45 PM
Subject: [Hammarlund] SP-600 IF Gain


> I'm working on what I think is a JX-4. I'm not sure because the tuning-cap 
> cover
> is MIA. It was dirty and beat-up when I got it, but it's turning into a 
> pretty
> nicely performing receiver.
>
> The set has an IF Gain control in the upper right-hand corner, where the 
> crystal
> frequency control usually is. The IF Gain pot feels sort of funky as I 
> turn it.
> I'm thinking it's bad or about to go bad.
>
> Does anyone know the resistance of the IF Gain pot? If I were to replace 
> it, would
> it be audio or linear taper? What about wattage?
>
> As always, thanks.
>
> Joe Connor
>