[Hallicrafters] HT-44/SX-117 - Clean em' up!

[Greg Mijal]

Cream of Tartar (Silver polish paste) and a tooth brush is the best and most
cost effective way to take the black out of those nasty looking rf
connectors. Liquid silver cleaners work well too but need an alcohol rinse
to remove all residue otherwise the connector will stick in it's mate.
Radio metal corrosion/ oxidation is very random in it's electrical effects
on the radio.  I have a Drake TR-3 with completely corroded chassis and it
still works ok. On the other hand,  stuff that looks good to the eye won't
pass electricity unless it gets a cleaning and electrical check.
Keeps me on my toes.
73's
Greg
WA7LYO
in sunny feenix
----- Original Message ----- 
From: "Roy Morgan" <roy.morgan at nist.gov>
To: <glowbugs at piobaire.mines.uidaho.edu>; <Hallicrafters at mailman.qth.net>
Sent: Wednesday, December 07, 2005 9:17 AM
Subject: Re: [Hallicrafters] HT-44/SX-117


> At 09:57 AM 12/7/2005, Langston, Mike wrote:
> >I hope this may help someone else.
>
>
> Mike,
>
> THANKS, Some of us can use the tip, no doubt.
>
> >Sensitivity was way down on the SX-117. ...tightened onescrew on the
> >SO-239 receptacle where it attaches to the chassis and that did it.
>
>
> This is a good reason to be thorough. Tightening the screws did the trick
> for you. There are other things to do:
>
> 1) Apply a bit of De-Oxit around the socket, loosen it and rub the thing
> against the chassis, then tighten the screws.
>
> 2) (More drastic) Get a 200 watt American Beauty and a wire brush. Clean
> the chassis and socket well and SOLDER the thing down.
>
> One fellow reported troubles in his TMC GPR-90 receiver.  He found bad
> connections between many of the terminal strip grounding/mounting tabs and
> the chassis, and more between tube socket rings and the chassis.  His
> solution was to solder them all, repeat all, to the chassis. The Weller
> 8100 solder gun will not work. You nee a monster solder iron.  (I have not
> done that to my GPR-90 but I expect to.)
>
> >...Tonight I plan on tightening the SO-239 attachment screws on all
> >my rigs.
>
> Grab the De-Oxit while you are at it.  www.caig.com
>
> May we all triumph over oxidation!
>
> Roy
>
>
>
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Cell 301-928-7794
> Work: Voice: 301-975-3254,  Fax: 301-948-6213
> roy.morgan at nist.gov --
>
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