[Hallicrafters] Tuning Knob Set Secrews

[Rod]

Using "Service Solvent" to soften up the cemet used to lock the threads, let 
it set a while, then using
proper size allen/bristol tool heat -it- up with solder gun/iron.  Works on 
lotsa stuff for me.

Rod
K0EQH

----- Original Message ----- 
From: "Rich Evans" <rlevans at enter.net>
To: <hallicrafters at mailman.qth.net>
Sent: Wednesday, February 25, 2009 10:17 AM
Subject: [Hallicrafters] Tuning Knob Set Secrews


>I am faced with a similar problem on three, maybe more, boatanchors,
> concerning the main tuning knob set screws.
> Previous owners were apparently not aware of the applied-heat trick to 
> break
> loose the set screws, whether Bristol
> or Allen or straight.
>
> These frustrated guys drilled out the screw, thus destroying the thread. 
> The
> only solution I can see is to tap the
> holes for a #10. I guess it will be 32 tpi; I can't find anything finer. 
> In
> fact I can't find any #10 set screws. I could
> make my own carefully in a vice, I suppose.
>
> So, what have any of you done to solve this problem?  Specifically, a 
> 75A4,
> SX-101, R-390A  (maybe 2).
> Thanks as always.
>
> Rich Evans  W3FYD  Sellersville, Pa.
>
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