No, a 3.579 trap would indeed notch out the fundamental,. but not the harmonics. Those signals are coming in on your antenna. For any of a number of reasons, the 14 MHz versions of the interference are more prevalent. Consider that 20 meter signals propagate more easily from home wiring than do 80 meter signals, plus the aforementioned fact that many computer cards use the 14.318 frequency directly. A 80 meter trap certainly won't affect those. As a rule, a person can find any number of signals scattered across the entire 14.315 to 14.319 range. Yes, they are crystal controlled, but the crystals themselves are not necessarily that accurate - in many cases, "close" is good enough, and a lot cheaper.
- Jim,. KL7CC Edward R. Cole wrote: > So could one insert a trap on 3.579 MHz to notch the offender? Are > the harmonics generated inside the receiver or where? > > > 73, Ed - KL7UW, WD2XSH/45 > ====================================== > BP40IQ 500 KHz - 10-GHz www.kl7uw.com > EME: 50-1.1kW?, 144-1.4kw, 432-100w, 1296-testing*, 3400-? > DUBUS Magazine USA Rep [email protected] > ====================================== > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
