I sat back and waited for all the responses, and you're on the right track.
I've done this using band pass cavities on both UHF and VHF. The only error is that you should not terminate the cavity with a 50 ohm load. You will be able to see the difference (terminated, then unterminated), assuming you are using a spectrum analyzer and tracking generator. Last, you can cascade cavities to increase the suck out notch. Yes, the cable length is critical. Bill W6CBS Thanks for the replies folks - some good ideas. I should have clarified that the spare T-1500 cavities I have are BP only. And my plan is to use it as a suck-out (notch) filter. That is why I was talking about using a T in line with the receive line. Ken
