Plasma TV in the neighborhood? The PX3 could be picking it up through the connecting cables if it is strong enough.
wunder K6WRU CM87wj http://observer.wunderwood.org/ On Nov 15, 2014, at 6:26 PM, Alan <[email protected]> wrote: > Horizontal scan rate on a video monitor? > > Alan N1AL > > On 11/15/2014 02:42 PM, Dauer, Edward wrote: >> Anyone have an idea where and how I might begin tracking this down . . . >> >> KX3 (indoors with a Buddipole) has a signal every 18 Khz across almost all >> of the HF spectrum, worst on 15M. It also appears on the PX3 display - in >> all the same places. On both AM and CW it sounds like a buzzing, with about >> a 1+ Khz bandwidth.. >> >> The signal level changes on the KX3 as expected with PRE and ATT cycled. On >> the PX3 display, PRE and ATT change the base level but not the absolute >> value of the peaks. >> >> Here's the odd thing - the audible signal disappears from the KX3 when the >> antenna is removed, but it does not disappear from the PX3 - where, again, >> the base level changes but the magnitude above base level does not. And it >> remains in the PX3 display even when the I/Q cable is removed. >> >> Neither the KX3's NB nor NR change anything. >> >> The KX3 is running from batteries, so it's not the outboard power supply. >> Neither is it the PX3's wall wart, since the signals are present in the KX3 >> when that supply is removed from the source. >> >> Unfortunately it will be a while before I can move the equipment to another >> location to see if that matters. In the meantime, anyone know a signal >> source with harmonics at 18 Khz? >> >> Tnx, >> >> Ted, KN1CBR >> ______________________________________________________________ >> 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] >> >> > > ______________________________________________________________ > 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] ______________________________________________________________ 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]
