[R-390] SIGMAPERT Balun?

[Frank Hughes]

Balun discussion motivated me to look through my R-390/URR connectors.

Anyone else using the balun and test tool from:

Dr. Kurt Schmid, DH3PJ, sigmapert at gmx.de

I also use his 3TF7 and 26Z5W devices.
73 
Frank
KJ4OLL
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