[Hallicrafters] 1000 kc crystal tube

[springertool at wyoming.com]

I ran across an interesting "tube" recently among my boatanchors .. a triple AND gate inside a metal, 11-pin tube ... albeit, diode logic, it shows the evolution of technology.  see pics at:   http://www.springertool.com/BoatAnchors.html

Jon, KØFOP



--- rbethman at comcast.net wrote:

From: rbethman <rbethman at comcast.net>
To: hallicrafters at mailman.qth.net
Cc: Mike Everette <radiocompass at yahoo.com>
Subject: Re: [Hallicrafters] 1000 kc crystal tube
Date: Thu, 25 Feb 2010 21:40:37 -0500

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
>
>   

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