[R-390] Heat Dissipating Tube Shields: Collins KWS-1 Service Bulletin #2

Todd, KA1KAQ ka1kaq at gmail.com
Tue Dec 4 16:35:30 EST 2012


On Tue, Dec 4, 2012 at 9:54 AM, <chuck.rippel at cox.net> wrote:

> This was not exactly the document I was looking for but "Part C" of KWS-1
> Service Bulletin #2, dated 01/25/1957 speaks to the benefits of heat
> reducing tube shields and documents a production change in
> KWS-1 transmitters to begin including them.  Older products can be
> retrofitted with Collins part number 542 3177 00 for the princely sum of
> $17.25 per kit.
>

Somewhere I have a sales slick of the Collins heat-dissipating shields.
Might be in one of their old product catalogs. They had their own
Collins-branded version of what looks to be the typical EBY/ELCO type
twist-lock. Painted black with a black corrugated sink inside that
resembles cardboard.

But the key piece that is often missing is the small strip that fits into
the socket base to contact the envelope around the pins.

de Todd/'Boomer'  KA1KAQ/4


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