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Half of the final prototype for the directional Coupler complete. Isn't she pretty!
@freemo
Looks nice even if it doesn't have over a hundred turns
@ab3xu Sadly any more than that and it wont work well on the frequencies I wanted. The 126 turn one I tried out had some cool characteristics (like very low insertion loss) but self-resonated so much as to be useless.
@freemo
I have a partially built N2PK SWR meter with a similar coupler -- 11 bifilar turns on a toroid with coax is the primary. And hopefully it will work as designed! as I know very little of the theory that goes into their design
@ab3xu In this case it is for the sort of next level after a SWR meter. Part of a VNA Radio Meter. It doesnt just report reflected power but rather complex power, plotted to a smith chart in real time.
@bamfic
Yup everything is open-source, including hardware and software. so far I am the only author. Version one worked well and was accurate, version 2 expands on it and will be more useful with a better UI. V2 will be the one someone would actually want to build which is what im developing now. V1 was a proof of concept that worked find had to be explicitly told what frequency it was on (no frequency counter).
