[R-390] R390 knob set screw

[JMILLER1706 at cfl.rr.com]

Maybe you can just buy a new knob from someone here.  I have done that, usually a few bucks each.  

----- Original Message -----
From: Barry <n4buq at aol.com>
Date: Thursday, April 14, 2005 12:43 pm
Subject: Re: [R-390] R390 knob set screw

> I wonder if anyone makes #8-36 helicoil thread repair inserts.
> 
> Barry - N4BUQ
> 
> > Dan,
> > my notes say it's 8-36 UNF thread, yet another oddity of the 
> 39x's. If you
> > had the tap you could epoxy the hole and drill and retap it but a
> > replacement knob can be gotten cheaper.
> >
> > Sometimes you can smear some JB Weld across just the damaged 
> area, let it
> > firm up a bit, and then use the setscrew itself as a tap, then 
> remove it
> and
> > let the JB cure. If your lucky it can give the setscrew the 
> little extra
> > bite it needs to do the job.
> >
> > That phenolic insulating shaft on the 390 is pretty tough, I 
> wouldn'tworry
> > too much about hurting it.
> >
> > John
> 
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