Hi Jim: This S band measurement technique I thought was interesting. It's a broad band directional coupler, can be used for L band too. Doesn't have a VCO but gives a good visual indication of return loss. _http://www.qsl.net/n9zia/24swr/index.html_ (http://www.qsl.net/n9zia/24swr/index.html)

73, Ron n6paa

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