I've been hankering to do some EE work lately... I think I want to do something analog, maybe RF, but what to do....

@freemo get yourself a red pitaya and a directional coupler off eBay and you'll have everything to make a one-port VNA for €300.

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@comphys I already have relatively high end spectrum analyzers and scopes. I even have several directional couplers 3 of which I made myself. The issue I have had with all the directional couplers I used so far is they tend to either not support the power or vary with frequency. I need to give it another go but success has been limited.

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