[Hammarlund] SP-600 RF Deck (Success)

[Richard Knoppow]

----- Original Message ----- 
From: "Joe Connor" <joeconnor53 at yahoo.com>
To: <hammarlund at mailman.qth.net>
Sent: Thursday, January 05, 2012 8:05 PM
Subject: Re: [Hammarlund] SP-600 RF Deck (Success)


     SP-600ds are a lot easier to work on than they look. I 
am not sure what the black stuff is but suspect its copper 
sulfide. AFAIK, the only protective coating use on these RX 
was the MFP lacquer on some military sets. That can be a 
PITA depending on how it was applied. On my JX-17 it was 
sprayed on the dial gears and inside the turret where it 
covered some grounding contacts. Its very difficult to 
remove. Paint stripper will do it but is very slow. The RF 
modules were also glued to the turret frame with it. UGH!

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com

> This is an interesting set. It's a miliary JX-14. In 
> recapping the whole thing, I found only one non-original 
> part. Also, the pins on the RF turret where coated with 
> this black stuff. When I got the RF deck out, I saw that 
> the fingers on the RF deck were full of the same stuff. I 
> wonder if this radio was stored for a long time and that 
> this stuff was some kind of preservative put on to protect 
> it. Also, in checking resistors, I found only three or 
> four that were more than 10% off. I'll bet this set didn't 
> get much use.
>
> Again, thank you all for your help.
>
> Joe Connor
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