[WriteLog] Re: Monitor RFI

[Phil Catterall]

I purchased a flat panel monitor over a year ago and never looked back,
having been plagued with EMC monitor problems since I got a PC in 1991. The
only monitor using EHT that I ever had and tried (over 10 of them) was an
old Phillips 14" VGA. Later Phillips 15" models, Sony, Compaq, IBM, Mag were
all baddies and I tried all the usual EMC fixes with limited success. One
tip - you can move the RFI around the ham bands by changing the refresh
properties of your screen. Right click in your workspace and go into screen
"advanced properties" and change the refresh rate.

73 Phil Catterall
G4OBK

----- Original Message -----
From: <writelog-request at contesting.com>
To: <writelog at contesting.com>
Sent: Tuesday, January 21, 2003 5:02 PM
Subject: WriteLog digest, Vol 1 #863 - 11 msgs


> Send WriteLog mailing list submissions to
> writelog at contesting.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.contesting.com/mailman/listinfo/writelog
> or, via email, send a message with subject or body 'help' to
> writelog-request at contesting.com
>
> You can reach the person managing the list at
> writelog-admin at contesting.com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of WriteLog digest..."
>
>
> Today's Topics:
>
>    1. Re: RF from your Computer Monitor.. (FireBrick)
>    2. Re: RF from your Computer Monitor.. (Dez in Cyprus)
>    3. Re: RF from your Computer Monitor.. (Blake Meinecke)
>    4. RE: RF from your Computer Monitor.. (Don Cassel)
>    5. RE: RF from your Computer Monitor.. (Don Cassel)
>    6. Re: RF from your Computer Monitor.. (Jerry Flanders)
>    7. Newfoundland (n5pa)
>    8. Who I am? (Dash Rendar)
>    9. RE: Newfoundland (Don Cassel)
>   10. Re: Newfoundland (Dash Rendar)
>   11. Re: RF from your Computer Monitor.. (Dave Hachadorian)
>
> --__--__--
>
> Message: 1
> Reply-To: "FireBrick" <w9ol at billnjudy.com>
> From: "FireBrick" <w9ol at billnjudy.com>
> To: "Mike Baker K7DD" <k7ddmjb at qwest.net>
> Cc: "Writelog List" <writelog at contesting.com>
> Subject: Re: [WriteLog] RF from your Computer Monitor..
> Date: Tue, 21 Jan 2003 05:27:30 -0600
>
> I've had luck with LCD displays.
> What I do is go to places like Best Buy, or CompUSA with my little rf
> sniffer/headphone device and pass it buy each monitor.
> Sometimes you can use an small (read cheap) am portable, tuned off
station.
>
>
> ----- Original Message -----
> From: "Mike Baker K7DD" <k7ddmjb at qwest.net>
> To: <writelog at contesting.com>
> Sent: Tuesday, January 21, 2003 12:27 AM
> Subject: [WriteLog] RF from your Computer Monitor..
>
>
> > Hello Gang,
> > I am sure I can't be the only one who has RF from his computer monitor
> > getting into his rig on receive.  At times the sigs are so bad it
becomes
> > white noise all across a band with BIG birdies intermixed.  40CW is
> probably
> > the worst band for me.  Have anyone of you come up with a monitor that
is
> RF
> > QUIET?  I now use a laptop that is almost silent but I miss the larger
> > display and ability to separate the monitor section from the rest of the
> > computer. My computer is now almost silent (Dell 420 workstation) but
the
> > monitor is still a broadband sig generator.  Any suggestions?  Any one
> using
> > the newer "flat panel" displays? and how are they for noise.
> >
> > Mike Baker  K7DD
> > k7ddmjb at qwest.net
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
> >
> >
>
>
>
> --__--__--
>
> Message: 2
> From: "Dez in Cyprus" <dez at cytanet.com.cy>
> To: "Mike Baker K7DD" <k7ddmjb at qwest.net>, <writelog at contesting.com>
> Subject: Re: [WriteLog] RF from your Computer Monitor..
> Date: Tue, 21 Jan 2003 11:26:16 -0000
>
> Hi Mike,
>
> You might care to experiment with the display settings of your monitor.
>
> I find my Compaq 17" monitor is quieter (around the ham bands at least)
> running at 800 x 600 pixels, rather than say 1024 x 768.
>
> Just a thought.
>
> 73
>
> Dez
>
>
> ----- Original Message -----
> From: "Donald Eriksen" <don.wsixffh at verizon.net>
> To: "Mike Baker K7DD" <k7ddmjb at qwest.net>; <writelog at contesting.com>
> Sent: Tuesday, January 21, 2003 7:41 AM
> Subject: Re: [WriteLog] RF from your Computer Monitor..
>
>
> > I can sympathize with you, I tried two differant CRT monitors a few
years
> > ago and the hash was just about like you described. I finally went to a
> LCD
> > flat panel monitor and I can assure you, they're RF quiet. It made the
> > difference between being able to work only the strongest stations to
being
> > able to work signals that barely register on the S-meter.
> > I just recently added a second similar monitor (both 15") and am
enjoying
> > all the windows and boxes WriteLog has to offer with no noise. This is
not
> a
> > very cost effective solution, but it was the only one for me.
> >
> > Good Luck, 73
> > Don W6FFH
> >
> >
> > ----- Original Message -----
> > From: "Mike Baker K7DD" <k7ddmjb at qwest.net>
> > To: <writelog at contesting.com>
> > Sent: Monday, January 20, 2003 10:27 PM
> > Subject: [WriteLog] RF from your Computer Monitor..
> >
> >
> > > Hello Gang,
> > > I am sure I can't be the only one who has RF from his computer monitor
> > > getting into his rig on receive.  At times the sigs are so bad it
> becomes
> > > white noise all across a band with BIG birdies intermixed.  40CW is
> > probably
> > > the worst band for me.  Have anyone of you come up with a monitor that
> is
> > RF
> > > QUIET?  I now use a laptop that is almost silent but I miss the larger
> > > display and ability to separate the monitor section from the rest of
the
> > > computer. My computer is now almost silent (Dell 420 workstation) but
> the
> > > monitor is still a broadband sig generator.  Any suggestions?  Any one
> > using
> > > the newer "flat panel" displays? and how are they for noise.
> > >
> > > Mike Baker  K7DD
> > > k7ddmjb at qwest.net
> > >
> > > _______________________________________________
> > > WriteLog mailing list
> > > WriteLog at contesting.com
> > > http://lists.contesting.com/mailman/listinfo/writelog
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
> >
> >
>
>
> --__--__--
>
> Message: 3
> From: "Blake Meinecke" <n4gi at tampabay.rr.com>
> To: "Dez in Cyprus" <dez at cytanet.com.cy>,
>    "Mike Baker K7DD" <k7ddmjb at qwest.net>, <writelog at contesting.com>
> Subject: Re: [WriteLog] RF from your Computer Monitor..
> Date: Tue, 21 Jan 2003 07:09:39 -0500
>
>
> > running at 800 x 600 pixels, rather than say 1024 x 768.
>
> Display refresh frequency has a lot to do with also, ie. 50, 60, 70, or 80
> hz......
>
> Blake N4GI
>
>
> --__--__--
>
> Message: 4
> From: "Don Cassel" <doncassel at compuserve.com>
> To: <writelog at contesting.com>
> Subject: RE: [WriteLog] RF from your Computer Monitor..
> Date: Tue, 21 Jan 2003 07:21:06 -0500
>
> Strangely I had the opposite problem, ie. RF getting into the monitor
> especially on 40 and 80. Changing the display freq eliminated the problem.
> So it seems to work both ways. Changing the resolution made some
difference
> but the Hz was the real solution.
>
> Don VE3XD
>
> > -----Original Message-----
> > From: writelog-admin at contesting.com
> > [mailto:writelog-admin at contesting.com]On Behalf Of Blake Meinecke
> > Sent: Tuesday, January 21, 2003 7:10 AM
> > To: Dez in Cyprus; Mike Baker K7DD; writelog at contesting.com
> > Subject: Re: [WriteLog] RF from your Computer Monitor..
> >
> >
> >
> >
> > > running at 800 x 600 pixels, rather than say 1024 x 768.
> >
> > Display refresh frequency has a lot to do with also, ie. 50, 60, 70, or
80
> > hz......
> >
> > Blake N4GI
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
>
>
> --__--__--
>
> Message: 5
> From: "Don Cassel" <doncassel at compuserve.com>
> To: <writelog at contesting.com>
> Subject: RE: [WriteLog] RF from your Computer Monitor..
> Date: Tue, 21 Jan 2003 07:21:06 -0500
>
> Strangely I had the opposite problem, ie. RF getting into the monitor
> especially on 40 and 80. Changing the display freq eliminated the problem.
> So it seems to work both ways. Changing the resolution made some
difference
> but the Hz was the real solution.
>
> Don VE3XD
>
> > -----Original Message-----
> > From: writelog-admin at contesting.com
> > [mailto:writelog-admin at contesting.com]On Behalf Of Blake Meinecke
> > Sent: Tuesday, January 21, 2003 7:10 AM
> > To: Dez in Cyprus; Mike Baker K7DD; writelog at contesting.com
> > Subject: Re: [WriteLog] RF from your Computer Monitor..
> >
> >
> >
> >
> > > running at 800 x 600 pixels, rather than say 1024 x 768.
> >
> > Display refresh frequency has a lot to do with also, ie. 50, 60, 70, or
80
> > hz......
> >
> > Blake N4GI
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
>
>
> --__--__--
>
> Message: 6
> Date: Tue, 21 Jan 2003 14:35:53 +0000
> From: Jerry Flanders <jeflanders at comcast.net>
> Subject: Re: [WriteLog] RF from your Computer Monitor..
> To: Mike Baker K7DD <k7ddmjb at qwest.net>
> Cc: writelog at contesting.com
>
> I don't have any monitor recommendations, but if you just want to reduce
> the noise, do this test: Cap and shield the receiver's antenna connection
> and see if the noise goes away (connecting to a shielded dummy load with
> good coax should work for this test). If the noise goes away, just find
out
> exactly where it is getting into the antenna line and work on that. Years
> ago I had noise, found out I had a leaky antenna tuner. I dumped that
tuner
> and used good shielded unbroken coax between the shack and antenna -
> problem solved.
>
> Jerry W4UK
>
> At 23:27 1/20/03 -0700, you wrote:
> >Hello Gang,
> >         I am sure I can't be the only one who has RF from his computer
> > monitor
> >getting into his rig on receive.  At times the sigs are so bad it becomes
> >white noise all across a band with BIG birdies intermixed.  40CW is
probably
> >the worst band for me.  Have anyone of you come up with a monitor that is
RF
> >QUIET?  I now use a laptop that is almost silent but I miss the larger
> >display and ability to separate the monitor section from the rest of the
> >computer. My computer is now almost silent (Dell 420 workstation) but the
> >monitor is still a broadband sig generator.  Any suggestions?  Any one
using
> >the newer "flat panel" displays? and how are they for noise.
> >
> >Mike Baker  K7DD
> >k7ddmjb at qwest.net
>
>
>
> --__--__--
>
> Message: 7
> Reply-To: <n5pa at arrl.net>
> From: "n5pa" <n5pa at arrl.net>
> To: <writelog at contesting.com>
> Date: Tue, 21 Jan 2003 09:24:09 -0600
> Subject: [WriteLog] Newfoundland
>
> I never saw the final word, what abbreviation do we use for Newfoundland?
>
> 73's
> Alan, N5PA
>
> --__--__--
>
> Message: 8
> From: "Dash Rendar" <dash23254 at hotmail.com>
> To: "Writelog" <WriteLog at contesting.com>
> Date: Tue, 21 Jan 2003 10:28:42 -0500
> Subject: [WriteLog] Who I am?
>
> In this VE2 land  we are PQ or QC?? I know some of you said "These
Canadian
> provinces are way too complicated... Let's just
> make Canada the 51st state and be done with it." But do you see our
Premier
> Jean Chrétien as President, please not this nightmare;-)
> -
> Daniel VE2SB
>
> Chaleureux 73 & Salutations au QRA familial.
> Best 73 & God bless your family.
>
> * LA VIE EST TROP COURTE POUR NE PAS FUMER LE CIGARE *
> * LIFE IS TOO SHORT FOR NOT SMOKING CIGAR *
>
>
> --__--__--
>
> Message: 9
> From: "Don Cassel" <doncassel at compuserve.com>
> To: <n5pa at arrl.net>, <writelog at contesting.com>
> Subject: RE: [WriteLog] Newfoundland
> Date: Tue, 21 Jan 2003 10:38:42 -0500
>
> NL seems to be the current consensus.
>
> Don VE3XD
>
> > -----Original Message-----
> > From: writelog-admin at contesting.com
> > [mailto:writelog-admin at contesting.com]On Behalf Of n5pa
> > Sent: Tuesday, January 21, 2003 10:24 AM
> > To: writelog at contesting.com
> > Subject: [WriteLog] Newfoundland
> >
> >
> >
> > I never saw the final word, what abbreviation do we use for
Newfoundland?
> >
> > 73's
> > Alan, N5PA
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
>
> --__--__--
>
> Message: 10
> From: "Dash Rendar" <dash23254 at hotmail.com>
> To: <n5pa at arrl.net>, <writelog at contesting.com>
> Subject: Re: [WriteLog] Newfoundland
> Date: Tue, 21 Jan 2003 11:04:26 -0500
>
> I don't know for myself (PQ or QC?) so.... for Newfies hummm? I think the
> next contest (cw 160) will not to be a cake.
> 73
> Daniel VE2SB
>
> ----- Original Message -----
> From: "n5pa" <n5pa at arrl.net>
> To: <writelog at contesting.com>
> Sent: Tuesday, January 21, 2003 10:24 AM
> Subject: [WriteLog] Newfoundland
>
>
> > I never saw the final word, what abbreviation do we use for
Newfoundland?
> >
> > 73's
> > Alan, N5PA
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog at contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
> >
>
> --__--__--
>
> Message: 11
> To: writelog at contesting.com
> Date: Tue, 21 Jan 2003 09:09:59 +0000
> Subject: Re: [WriteLog] RF from your Computer Monitor..
> From: Dave Hachadorian <k6ll at juno.com>
>
>
>
> On Mon, 20 Jan 2003 23:27:00 -0700 "Mike Baker K7DD" <k7ddmjb at qwest.net>
> writes:
>
> > Have anyone of you come up with a monitor
> > that is RF
> > QUIET?
>
> As I have posted repeatedly on cq-contest, The Envision EN-710e is
> a very quiet 17" CRT monitor, available for a low price if you can wait
> for
> a rebate offer to come along. You just missed a rebate deal 2 weeks ago
> where it was available at Staples for less than $70, after rebate.
>
> Keep an eye on your Sunday morning Staples flyer, or subscribe to
> their e-mail ads, which come out on Friday. The rebate is usually
> in the order of $80, so it would be a shame to pay full price. If
> a deal comes along, snap it up on Sunday morning, because they sell
> like hotcakes.
>
> I have found only two very low level narrow-band signals in the
> HF bands from this monitor. Both were about S-1. I run 1500W here,
> and have never had rfi  _to_  the monitor either.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
>
> --__--__--
>
> _______________________________________________
> WriteLog mailing list
> WriteLog at contesting.com
> http://lists.contesting.com/mailman/listinfo/writelog
>
>
> End of WriteLog Digest


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.443 / Virus Database: 248 - Release Date: 10/01/2003