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Xringer · 04-22-14, 06:30 PM

I used to have problems with temperature sensors (solar HW) that used NTC resistors.
Whenever I used ham radio transmitters, I would get some pump relay chatter..
I used ferrite bead filters and got rid of most of the problem.
I obtained the filters from old VGA cables..
Ferrite Beads on A/V Cables: How Do They Work? - Tested

This type of filter works for keeping RFI noise off long runs of cable for both analog and digital signals..

04-22-14, 06:30 PM	#186
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	I used to have problems with temperature sensors (solar HW) that used NTC resistors. Whenever I used ham radio transmitters, I would get some pump relay chatter.. I used ferrite bead filters and got rid of most of the problem. I obtained the filters from old VGA cables.. Ferrite Beads on A/V Cables: How Do They Work? - Tested This type of filter works for keeping RFI noise off long runs of cable for both analog and digital signals.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..