You can see the specs including curves etc for the DCI filters at <http://www.dci.ca/?Section=Amateur> and they should answer your questions about them.
73, Tony W4ZT
At 11:00 PM 12/26/2004, you wrote:
Eric,
Thank you for the explanation of the TWPC-4508-2 bandpass filter and its application. This is the way people like me who have been playing with this stuff gets straight info on how things really work without spending wasted hours at the repeater site.
I thought this filter could be hooked either as a pass or notch cavity. The FM broadcast station is very close to my 2 meter repeater antenna. I thought proper approach would be put FM TWPC-1005-1 cavity in my Rx side of my duplexer to notch out FM station. Or, should I put a DCI filter in line someplace. Or add a pass cavity on Rx side. What happens to the RF rejection on a filter such as a DCI for 2 meters when the freq you want to reject is say 46.205 mhz away from 2 meter repeater input. How much attenuation does a filter such as a DCI provide at these far away freqs? I don't want to be boring for those who are in the know. But I am aware there is a lot of good knowledge here. Not everyone tuned into this reflector is an expert. That's why many are here.... to help us guys learn.
Thanks,
Gary K2UQ
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