Today I show what a duplexer does on a repeater, how they are tuned and how you can eliminate interference with other types of filters.
Learn more about repeaters 👉 https://www.youtube.com/playlist?list=PLSuX83ay4Oug4QxmLe8MLyXjEqFd1Qr8-
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⏱️Chapters⏱️
0:00 What is a duplexer/cavity filter
1:46 Vari-Notch filters
2:33 Bandpass filters
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