I have a bunch of the split ferrites with a hole to fit RG-213 coax on hand.
Got 2 turns through the hole and used 3 of them with complete elimination of
the noise.
Barry W2UP
.
Jim Brown-10 wrote
Don't wrap the cable with ferrites, WIND turns of the cable through a
ferrite core. #31 or
On 5/15/2012 7:37 AM, Barry wrote:
I'll wrap the HDMI cable with some firrits.
Don't wrap the cable with ferrites, WIND turns of the cable through a
ferrite core. #31 or #43 material work fine, at least five turns
through a 2.4-in o.d. toroid, at least three turns through a clamp-on
that's
Replaced my laptop/shack computer recently with a Dell XPS 15 laptop. Now I
have spurs every ~3 KHz across 15m. Any suggestions on getting rid of or
minimizing them?
Tnx,
Barry W2UP
--
View this message in context:
Received several emails suggesting the power supply. Spurs are still there
when running on battery.
Barry W2UP
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Spurs-on-15m-from-new-laptop-tp7555872p7555875.html
Sent from the Elecraft mailing list archive at Nabble.com.
OK. Just found the problem. It's monitor-related.
Same monitor (HP 2311x) as used with last 'puter with no problems. Only
difference is this computer uses an HDMI cable. Last computer used an SVGA
cable.
When I unplug the HDMI cable, noise stops. I'll wrap the HDMI cable with
some firrits.
Hi Barry,
You might want to try a different HDMI cable with better shielding, like
this one
http://www.amazon.co.uk/AmazonBasics-Quad-Shielded-High-Speed-Cable/dp/B002C1BHIO
I haven't tried it myself but they claim it's quad shielded.. But it
could also be the monitor's HDMI decoding circuit
, 2012 10:13:49 AM
Subject: Re: [Elecraft] Spurs on 15m from new laptop
Received several emails suggesting the power supply. Spurs are still there
when running on battery.
Barry W2UP
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Spurs-on-15m-from-new-laptop-tp7555872p7555875
it can be heart rending!
73,
Sandy W5TVW
-Original Message-
From: VE3GNO Daniel
Sent: Tuesday, May 15, 2012 9:46 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Spurs on 15m from new laptop
Than looks like is an internal notebook problem, I am wondering how they get
FCC
On 12-05-15 10:46 AM, VE3GNO Daniel wrote:
I am wondering how they get FCC certification? I would advise to return
it back due compliance issue..my 2 cents
Some years back I was working for a company that had an RF based hand-held
real-time data collection system used in focus groups. The
Send them firrits after 'em - that'll fix 'er!
73, Pete N4ZR
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