[Hammarlund] SP-600 IF Gain

[Al Parker]

Hi Joe,
    The pot in the factory mod. was 5k.  Go to The Hammarlund Historian 
website, shown in my sig, and go to "manuals".  Under SP-600 you'll find 
downloadable file on the IF mod.
    If there never was an FCU xtal ctrl unit, it's not a -JX-.  The X stands 
for Xtal ctrl, they didn't all have it.  The IF gain pot was usually 
installed in the Dial Lock hole when there was an FCU.
Al Parker, W8UT
New Bern, NC
www.boatanchors.org
www.hammalund.info

----- 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
>
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