[Elecraft] VERY noisy LCD Monitor. Any Suggestions?

[Jim Brown]

On 5/26/2019 12:15 PM, Jim KO5V wrote:
> I have a ~24" LCD monitor that I want to use for logging, to display my panadapter, etc. Unfortunately, it is very noisy on HF.

This is a very common problem. There are (at least) two heads to the 
snake. The most common, and easiest to fix, is the power supply if it is 
a wall wart. Wind multiple turns of the power cable through a #31 
Fair-Rite core. The other head of the snake is noise from within the 
monitor itself, which radiates directly from it's own wiring and from 
the video cable. No fix for what radiates from it's own wiring, but 
multiple turns of the video cable around a #31 Fair-Rite core will kill 
that part of the noise.

Another very good solution to the power supply component of the problem 
is to replace the noisy power supply with a quiet one -- namely, a 
vintage linear supply with a transformer, rectifier, and filter.

There's a lot more detailed advice on this on my website.

http://k9yc.com/KillingReceiveNoise.pdf
http://k9yc.com/KillingRXNoiseVisalia.pdf

73, Jim K9YC