[UK-CONTEST] 19" Flat screen monitors

[Clive Whelan]

Hi Dave

Yes it's definitely the monitor, as it also has an internal power supply.

I checked carefully that it wasn't on the video lead to the computer, 
and then I hung as much ferrite as I could on the mains lead to no 
avail, so it's probably direct  radiation. It's quite different to 
previous monitor QRM I've experienced ( though I've never had any 
trouble with an LCD before), inasmuch as it's a series of weakish 
discrete carriers, and on 21Mhz only ( no other band inc. WARC). As I 
said previously if the band were jumping I might not have even  noticed 
it, but once I had, it became intolerable on a virtually dead band. 
Interestingly when the monitor goes into power saving mode, and the 
screen is blanked, than the carriers completely disappear. It's 
obviously a resolvable problem, but life is very short

I'm not much of a telly watcher, and have always resisted having a TV rx 
in any other room but the lounge. However I always find that some soccer 
or rugby match or other is on as I sit down to eat, and I end up running 
back and to ( my Northern speech habits coming out there!) into the 
lounge to see the action replay of a goal or summat. So therefore I'll 
probably park the LG in the kitchen/diner , and make a mess of my shirt 
front while I'm watching the action!


I'll post my findings here in due course.



73



Clive
GW3NJW

Dave Lawley wrote:
> Hi Clive
>
> Are you sure it's the monitor? If it has an external SM PSU it might be 
> that, and you may find that by moving it or shielding it, you can cut 
> the noise down.
>
> I have a 17in NEC flat screen monitor with internal PSU, it's fine at 
> home but G4iFB and I found when we tried to use it on NFD that it was a 
> bit noisy on 20. We attached a ground wire to one of the screws on the 
> back and that made a big difference.
>
> Dave G4BUO
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