Posted by Marc Martin on
URL: https://www.es-forum.com/Digital-converter-for-t-v-problems-help-appreciated-tp1553564p1553610.html

> The power supply of my Dell laptop says
> INPUT: 100 - 240V ~ 1.5A 50-60Hz
> OUTPUT: 19.5V -- 3.34A

Yes, now THAT is a switching power supply. :-) If you could find
a power supply that only works for 120V 60Hz input, and outputs
19.5 V with 3.34 (or more) amps, then that would be a non-switching
equivalent. And you may need to find a plug adapter so you can
plug it into your laptop.

> I thought that all such bricks "tamp down
> current" in such a way that RF frequencies are produced.

Well yes, they do, although some of the folks on this group
believe that the switching power supplies are particularly
bad for people with ES. In my own experiments however,
I've found that plugging in a switching power supply sometimes
will LOWER the meter readings on my Stetzer meter (?!)

> So if the power supply of the Digital Adapter is linear - why does the AM
> radio test indicate that the power supply and the cord are "RF hotspots"?
> Am I "hearing" the AM radio wrong?

I would think that any AC/DC power transformer is going to produce RF
noise, not just the switching kind.

> I just hate that I have to even entertain the idea of switching or
> "upgrading" my t.v./cable service just to have a more tolerable bedroom
> environment. I wish there was a simpler solution - that
> didn't involve going back to 1980.

Well, I'm sure there is an EMF protection device that you could probably
stick onto the power supply that would reduce your symptoms. The problem
is that you'd probably have to try about 10 different ones (or more!)
before you found one that works well for you. Although maybe fewer
if you just stick to the ones that have worked for other eSens
members.

Marc