The Elecraft directional couplers have more than just couplers in them - at a minimum, they have forward and reverse (diode) power detectors as well, and most likely some analog electronics.
The coupler connects to the P3 using a 4-pair twisted pair cable with RJ-45 connectors on each end. You might be able to reverse engineer one, but a) why bother? (the Elecraft product is priced about right), and b) you might find that no one will lend you one to reverse engineer the coupler interface. Cheers, Dave AD6A -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of John Lemay Sent: Wednesday, January 25, 2017 1:02 AM To: Elecraft Reflector Reflector <[email protected]> Subject: [Elecraft] P3 TX Monitor I'm considering adding the TX Monitor to my P3. Can I use my own directional coupler for UHF/SHF, or is it essential to use the Elecraft RF Sensor ? Thanks John G4ZTR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
