Mark, I no longer have your original message, but if the "spur" was 1.2 kHz as I recall, I'm wondering if you have a local AM broadcast station which may have mixed in your final. I have seen sum and difference products from local transmitters mixing in a transmitter result in "spurs". Sometimes it is a matter of running intermod calculations on the local transmitters, identifying what is getting into your PA and then filtering them to prevent further problems. I'm not say its one transmitter, it could be two or more or it may not even be a mixing problem... just a thought outside the box.
73 ES DX, Gary - AB9M On 11/25/2016 11:47 AM, Mark Lunday wrote: > Thanks Patrick. > > It was two stations about 700 miles away in different directions. > > Instead of harmonic, I should have said Spur. I shall open a ticket with > Flex. > > Mark Lunday, WD4ELG > Greensboro, NC FM06be > wd4...@arrl.net > http://wd4elg.blogspot.com > > > -----Original Message----- > From: FlexRadio [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of > Patrick Greenlee > Sent: Friday, November 25, 2016 8:27 AM > To: flexradio@flex-radio.biz > Subject: Re: [Flexradio] Question about TX harmonics > > Mark, Harmonics are integral multiples of your frequency so whatever was > happening it wasn't a harmonic of your signal. > > How close was the reporting station to your QTH? Strange things happen when > someone experiences fundamental overload of their receiver. If able, > arrange to have a look at your emissions on a good spectrum analyzer. It > might not be something you are emitting but something created in his > receiver. > > One time in the early 60's I was reported to the FCC as causing TVI. I had > a 2nd class licensee prepare a fact finding report in response to "The > Letter" from the FCC. I was putting out a very clean 3 Watts on the CB band > and the "ancient" TV I was interfering with had an IF with band width > covering the CB freqs. I was transmitting directly into one of the TV > receiver's IF circuits. Solution: Hey dude, get a more modern TV. End of > story. > > > > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > To opt out of the Reflector: > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz To opt out of the Reflector: http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
