[time-nuts] Old xtal filter

Magnus Danielson magnus at rubidium.dyndns.org
Sun Mar 6 16:14:01 EST 2016


Hi Joe,

Oh, that one is for CW, to cut away as much noise as possible.

150 and 300 Hz has also been seen.

Cheers,
Magnus

On 03/06/2016 08:31 PM, Joseph Gray wrote:
> 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
>
>
>
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