On 11/24/2019 10:09 AM, Marty via Elecraft wrote:
> What I need to know is if anyone has a suggestion or experience as to brand/model that plays well in an RF environment not producing or being susceptible to noise.
The most common source of RF noise from video monitors is the
switch-mode power supply that virtually all of them use. A good way to
avoid that noise is to buy a monitor where the power supply is an
external wall wart that can 1) be replaced a vintage linear power supply
or 2) run from the 12-14VDC system in the shack.
I have had success with this approach with a few 23-24-in Samsung models
that run from 14VDC. Larger and fancier models run from higher DC
voltages, for which linear DC power supplies are much harder to find.
Some noise may also be generated by the monitors themselves, which can
be suppressed by winding video and power cables through #31 Fair-Rite
cores.
The only monitor I've seen that was had trouble with high power RF was a
Samsung model that used touch-screen controls. It went nuts when I
transmitted on a nearby antenna. It was given to me by another ham who
had the same problem.
73, Jim K9YC
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