[Hallicrafters] HT-37 - Stuck Slugs

[Greg Mijal]

If you can, measure the inductance of the ones coming out.  This will help
alot when you re-tune the radio.
Whatever you do, don't ding the coil form or the wire/ wire connections.
Some slugs just won't come out but a many can be loosened up until they
start moving.  Don't use a plastic tuning tool to attempt recovery of the
slug, use a metal hex screwdrive or flat tip.
Remove coil assembly and soak it in penetrating oil overnight. Then try to
work the slug loose slowly.  If it won't go and you have a good replacement
slug then destroy the old one piece by piece with a small screw driver until
the shaft is clear of all debris.
The worst one I have ever done was a Halli SX 101 rf coil that I had to
drill the slug out completely.  Since I didn't have an exact replacement I
tuned the rig with a smaller diameter size slug on the end of a stick, then
poured  hot wax into the coil form to immobilized it at the "sweet spot".
This work saved band 4 on the 101 and it's still working to this day.
Man I hate stuck slugs.  See them all the time on the old WRL stuff.
73's
Greg
WA7LYO
in sunny Feenix

----- Original Message ----- 
From: "David C. Hallam" <dhallam at rapidsys.com>
To: "Hallicrafters List" <hallicrafters at mailman.qth.net>
Sent: Monday, November 28, 2005 9:33 AM
Subject: [Hallicrafters] HT-37


> I am about to start an ambitious project to replace the mixer/driver coils
> in an HT-37.  Some of the slugs are stuck in the coil forms.  I have tried
> and tried to free them to the point where I have damaged the 20M forms to
> destruction.
>
> Has anyone removed these coils and have any tips or traps to look out for?
>
> I have a stripped chassis that has a good coil set that I will removed and
> use for the replacement.
>
> David
> KC2JD
>
>
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