Hi,
Is that 100Hz por 10cps? Seems like a CW filter for a 100Khz IF - Ex
500Khz Marine RX?
Cheers,
Will
On 07/03/16 08:31, 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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