[Milsurplus] Help ID Signal Corps Crystal Tester

[Bob Camp]

Hi

There are a number of more modern crystal testers out there. Some of  
them are available pretty cheap on the surplus market. If nothing else  
they are easier to maintain than some of the old TS sets. Accuracy  
wise the new ones may be better. It's been a long time since the  
Signal Corps stopped correlating those beasts.

Bob


On Nov 29, 2007, at 7:33 PM, WA5CAB at cs.com wrote:

> Bob,
>
> As to why I would want one, I sell a lot of surplus crystals for  
> sets like the BC-611 and statistically about 5% turn up dead (but  
> repairable, but you have to know it's dead in order to know you need  
> to repair it).  However, I have the full set of Signal Corps rack  
> mounted testers.  The reason I was asking about this one is that  
> someone I know asked me to see whether I could help ID it.  He had  
> one as a young ham in the 50's, so I guess it's probably like people  
> who want a DX-20 for the same reason.  Nostalga.
>
> In a message dated 11/29/2007 6:25:38 PM Central Standard Time, ham at cq.nu 
>  writes:
>> There are a *lot* of different crystal testers out there. They come  
>> in
>> a number of frequency ranges. They also went through several
>> generations of test sets.
>>
>> Not quite sure why you would want one ....
>>
>> Bob
>>
>>
>> On Nov 29, 2007, at 10:53 AM, WA5CAB at cs.com wrote:
>>
>> >Does anyone recognize what must have been a small (not the rack-
>> >mount ones) crystal tester probably dating from the late 40's or
>> >early 50's?  115 VAC operated, it has a 6X5GT rectifier and a 7C5
>> >oscillator.  One meter with a Zero-Operate switch.  Oscillator is
>> >set up like a TPTG.  All I have is the schematic sent by a guy in
>> >Sicily who is trying to ID something he once had, probably in order
>> >to try to find another one.  Nothing on the schematic he has by way
>> >of title block, and nothing about what crystal holder or frequency
>> >range it worked with.
>
>
> Robert & Susan Downs - Houston
> <http://www.wa5cab.com> (Web Store)
> MVPA 9480
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