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

[chuck.rippel at cox.net]

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.

The document I spoke to in an earlier post was the promotional cut sheet 
for the kit, above.  To put $17.25 in perspective, the 312A-1 ("A" line 
speaker with the Luma-Line lamp) was only $37 in the KWS-1 sales 
brochure.

A scan in .pdf format of the "Part C' from the original Service 
Bulletin, is linked below:


https://www.box.com/s/8kgsl3h6pi0wdetaie46


I have a LOT of original documents and will keep looking for the cut 
sheet for the shields.  It was pretty interesting reading.

---
No  trees were killed to deliver this message.  However, a large number 
of electrons were terribly inconvenienced.

Chuck Rippel