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Amateur Radio, Tech Insights and Product Reviews

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June 20, 2011
amateur radio duplexer filter homebrew radio frequency repeater VHF

Duplexer

A duplexer is a device that allows bi-directional (duplex) communication over a single channel. In…

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June 20, 2011
amateur radio cavity duplexer filter VHF

What Is Cavity Filter

Cavity filters are the basic circuitry behind a Duplexer and are sharply tuned resonant circuit…

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