[RFI] Another RFI question

[Dale J.]

My plasma TV is on today.  I see these noise spikes and major ones are every 240 Khz.  Does that sound like a battery charger or switching supply in the TV?  The strongest is on 3.857 and I can tune up or down 240 Khz and there it is again only weaker, but my dipole is tuned for 3.8 so it's not as resonant on the other frequencies.  The 3.857 spike is almost S9 +20 and it pulses up and down in strength sort of intermittently.   I can maybe do a screen shot and or audio recording if it would be of interest.   

I did order the #31 mix 2.4 inch donuts today, six, from Mouser along with a few other parts for a different project.  I could not find the .47 caps that K9YC mentions in the RF manual on page 22 figure 30, a home-brew brute force filter.  I'm going to build this filter and try to install it on that TV sometime in the future.  

That RFI manual that K9YC put together is a wealth of information, I printed all 66 pages and yesterday I read though it quickly, but darn-it if I misplaced it.  Oh-well, I'll just have to print another.  

73
Dale, k9vuj