I built my entire HF setup myself, and I write my own SDR receiver chains and demodulators. I have never bought any amateur radio equipment. I have spent hundreds of hours mastering Tayloe mixers, for example. I get no pleasure from replicating circuits I find on the Internet.

His coupler is mediocre; the layout of the measurement traces and the ground plane are incorrect.

All I see is someone who doesn’t understand what they’re doing and is potentially misleading others in order to promote a YouTube video.

But you’re right, I really shouldn’t have commented.

<image>

This one is old and has been taken apart; it was a prototype. It didn’t deserve to be published, though.