[time-nuts] Old xtal filter

Tom Miller tmiller11147 at verizon.net
Sun Mar 6 16:49:55 EST 2016


----- Original Message ----- 
From: "Joseph Gray" <jgray at zianet.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Sunday, March 06, 2016 2:31 PM
Subject: [time-nuts] Old xtal filter


> Assuming I made the pictures small enough, attached are two images of
> an very old crystal filter that a friend found. The strange thing
> about it is the bandwidth - 100 Hz. What could this have been used
> for, with such a narrow bandwidth?
>
>
> Joe Gray
> W5JG
>


--------------------------------------------------------------------------------

Loran maybe? It says 10 CPS for bandwidth.



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