Monitors radiating on 144.750?

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g8gtz
Posts: 1123
Joined: Wed Apr 07, 2010 6:26 pm

Monitors radiating on 144.750?

Post by g8gtz » Fri Oct 20, 2017 11:22 am

Hi

I'm sure this has been mentioned before - possibly on the G4KLB Sunday night show - but Ed G3VPF is reporting that his flat screen monitor radiates bang on 144.750.

Does anyone have a cure or if not can recommend a small screen that does not radiate?

73 - Noel G8GTZ

M0DTS
Posts: 383
Joined: Sun Feb 24, 2008 9:03 pm

Re: Monitors radiating on 144.750?

Post by M0DTS » Sun Nov 05, 2017 10:22 am

My LG E2242 does exactly the same.
Refresh rate adjustments seem to have no effect.

I wound about 5 turns on a ferrite right at the power input (12v) which helps but not a lot, that is not easy if it is direct mains input!
My antennas are about 40m away from the shack so i can manage.

Best answer is to change monitor, or swap with someone not into ATV?!

Rob

g0mjw
Posts: 816
Joined: Sat Sep 20, 2014 9:15 am

Re: Monitors radiating on 144.750?

Post by g0mjw » Sun Nov 05, 2017 1:46 pm

g8gtz wrote:Hi

I'm sure this has been mentioned before - possibly on the G4KLB Sunday night show - but Ed G3VPF is reporting that his flat screen monitor radiates bang on 144.750.

Does anyone have a cure or if not can recommend a small screen that does not radiate?

73 - Noel G8GTZ
My DELL 4K display seems OK.Its using displayport rather than HDMI which might have something to do with it.

VK5YYY
Posts: 75
Joined: Sun Sep 27, 2015 1:47 am

Re: Monitors radiating on 144.750?

Post by VK5YYY » Mon Nov 06, 2017 11:35 am

We get noise on our 446.5mhz DVB-T here in VK, VK5ALX tracked it down to the HDMI leads
So we don't run HDMI near a pre-amp for example, good quality HDMI leads are better
Putting you pre-amp at the back of a TV with HDMI leads is asking for trouble we found
Is it a coincidence that it's three times the frequency you speak of or the same problem
Cheers Roger

g8vpg
Posts: 307
Joined: Fri Oct 11, 2013 9:35 am

Re: Monitors radiating on 144.750?

Post by g8vpg » Tue Nov 07, 2017 10:54 am

The Satlink WS6906 also radiates on 144.750MHz, but being a self-contained unit, I don't think it would be easy to cure. Perhaps a metal box with a gauze covered aperture to view the screen?
73 Shaun G8VPG.

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