It's pretty unlikely you'd see harmonic content on any kind of broadband power sensor like a SWR meter. Even if the transmitter was really bad and had harmonic levels only 40 dB down, this would mean for 100 Watts output you would be getting 10 mW in harmonic energy, which wouldn't wiggle anybody's meter very much. And if the total harmonic power at 40 dB down was just equal to the reflected power from your antenna mismatch, this would mean the antenna would have a VSWR of 1.07. My money's on diode nonlinearities at low power levels.
73... Randy, W8FN On 10/10/2012 04:20, Tom Boucher wrote: > My theory in these cases is that it's nothing to do with bad antenna > connections, but more due to the rig putting out a higher harmonic content at > higher power levels. The SWR meter sees a bad SWR at the harmonic frequency > so the reading is slightly worse. ______________________________________________________________ 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
