[Hallicrafters] 1000 kc crystal tube

[rbethman]

Mike,

It becomes easy to think "glass tube encased crystal" when you associate 
with Hallicrafters!

Every SX-101 I've ever seen has one in it!

They indeed look strange!

Easy enough to understand the brain lapse - Lord only knows how many 
I've had!  ( LOL! )

Bob - N0DGN

On 2/25/2010 9:33 PM, Mike Everette wrote:
> You're exactly right.  I dunno where I got fixated on that being a glass enclosed crystal.  And the only instance I've seen of a 1000 KHz metal tube crystal is indeed the LM/BC-221.  Those crystals show up fairly often at hamfests.  And I have seen a glass 1000 KHz crystal, but it was in some sort of test gear other than a BC=221/LM.
>
> The only other metal tube-like crystals I've encountered are in ARC-5/SCR-274N Command Set transmitters (calibration crystals, various freqs).  Supposedly, in early models of the ART-13/ATC transmitters, there was a metal-tube crystal in the calibrator module, but it was 200 KHz.  I've only seen photos of these.  The later ART-13 models had a plastic 200 KHz crystal in an FT-241 holder.
>
> 73
>
> Mike
> WA4DLF
>
>