On 8/12/2023 11:36 AM, David Eckhardt wrote:
I have a smaller LG TV in my radio room. I can turn it on or off with just
10-watts or a bit less as long as an antenna of any kind is connected to
the TV (even an 18" cliplead) . No antenna, no problem - but, of course,
no TV.
Maybe 10 years ago, fellow NCCC member W4UAT gave me a 24-in Samsung
monitor that turned on and off with RF. As I recall, it had touch
controls to turn it on and off, maybe more functions. Larry lived on a
small lot, with antennas quite close. I used it for a bit, had that
problem only on one or two bands where antennas were close to the house.
I think it might have also made noise, don't recall.
I blamed the problem on the touch controls, which like touch lamps, have
very high-Z circuitry that is virtually impossible to fix. By then, I'd
already discovered 24-in Samsung monitors at Costco that run on 14VDC,
without touch controls, that are RF quiet when not run on their supplied
SMPS wall warts. Between us, W6GJB and I own about ten of them that we
use in the shack, his contesting trailer, and as extension screens for
laptops. All are powered from our own 12-14VDC systems. I mostly use 12V
batteries floated from linear warts.
Newer monitors and receivers are mostly run from higher DC voltages.
Last I looked, 20V or so was common. I re-gifted that touch-controlled
Samsung to a neighbor.
73, Jim K9YC
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