[Elecraft] LCD TV Causing RFI
Brian - N5BCN
n5bcn at yahoo.com
Sun Jan 30 18:19:53 EST 2011
Thanks to everyone's suggestions, I'm zeroing in on the culprit!!!
For reference, the two TVs in my house with the issues:
Samsung 46" LCD Model LN46A580P6F
Samsung 40" LCD Model LN40A530P1F (we rarely use this one, that's why I
didn't discover the RFI on this one until recently)
I had subconsciously convinced myself that it must be a noisy power supply
in the TV, but it turns out this wasn't the case at all!!
There are only two wires connected to each TV: A/C power and a HDMI cable to
the DVR (cable is plugged into the DVR, not the TV). The DVR is always "on"
to record show when the TV is off.
With the TV on, I unplugged the HDMI cable and viola!, no RFI. So, it seems
the noise is emanating form the HDMI cable, either being generated by the TV
or the DVR, but ONLY WHEN the TV is on! I have some #31 ferrite cores on
order from Mouser, and the offending HDMI cable will be the first target.
I'm secretly hoping it's the DVR box, and not my TV, so I can blame the
cable company. ;-) Not sure how to isolate which one it is, though.
73
N5BCN - Brian
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K2 #6800 KSB2 KAT2 KIO2 K160RX KNB2
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