ZenSafari wrote:

I am currently looking for a crystal filter in the CF range of 70 to
100MHz. I know that these are rare and are not standard for FM radio,
citizen's band, etc, but it would be most helpful for me to find one.
Ideally, the filter should have a passpand of +/-3.75kHz about the CF
(3dB). I've checked numerous manuf. who make these type of crystal
filters (FOX, ILSI, Raltron, MCF, etc) but most of their products are
vapor ware and have never been fabricated. Do any of you have a
suggestion of where I might find a filter that meets this spec? My goal
is to avoid another IF stage in my hardware...this is why I require the
narrow bandwidth at the high CF. Even if you have a suggestion of where
I might find a 70 to 100 MHz CF filter with a wider bandwidth I would
appreciate it very much.

I have a couple of the Ten Tec filters that were used in their Paragon
transceiver. 70 MHz center frequency, don't remember the bandwidth but could
measure one. Or you could check with Ten Tec and if it fits your
requirements, they're available.

W4ZCB