[Boatanchors] 100 KHZ CRYSTAL

[Al Klase]

On 8/13/2012 12:38 PM, Bill and Liz wrote:
> I just found a 100 khz crystal in a grey metal enclosure the same as, say, a
> 6SK7.  It is marked US Navy but nothing else except the date 1945.
>
> Anyone suggest what radio it came from? Were these crystals built ruggedly
> enough to have survived all these years?  I'd like to use it in a calibrator
> circuit for one of my receivers.
>
Bill,

Yes, high-quality high-precision crystals were hermetically sealed to 
assure long life.  However, crystals may shift frequency a bit with age 
anyway.  So, breadboard your circuit and make sure you can pull it onto 
100.000 +/- Khz before you do a lot of building.

Al

-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/