Brian Lloyd [mailto:[EMAIL PROTECTED]
Sent: Monday, December 01, 2008 5:40 PM
To: David Beumer WA3FDB
Subject: Re: [Flexradio] 40m qrm with harmonics
On Dec 1, 2008, at 3:56 PM, David Beumer WA3FDB wrote:
> Brian C & Brian L
>
> I did get an email from the ionosnode folks in Bo
olks that have directional
antennas and see if they are hearing it also.
Dave
_
From: Brian C [mailto:[EMAIL PROTECTED]
Sent: Saturday, November 29, 2008 8:55 PM
To: [EMAIL PROTECTED]
Subject: RE: [Flexradio] 40m qrm with harmonics
Well, I'm very interested to see what it turns out to be.
Brian
I am about 7 miles from Boulder -- I've got a an email out to the ionosonde
folks.
Dve
_
From: Brian C [mailto:[EMAIL PROTECTED]
Sent: Saturday, November 29, 2008 5:25 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: flexradio@flex-radio.biz
Subject: RE: [Flexradio] 40
eumer W0DHB
Cc: 'Brian C'; flexradio@flex-radio.biz
Subject: Re: [Flexradio] 40m qrm with harmonics
On Nov 29, 2008, at 10:21 AM, David Beumer W0DHB wrote:
> Brian
>
> You may be on to something.. I have since found the same pattern at
> around 5 Mhz with harmonics in 30m .
>
7;s a VIPIR, Vertical
Incidence Pulsed Ionospheric Radar installation.
http://www.ips.gov.au/IPSHosted/INAG/web-69/2008/boulder_vipir.pdf
> CC: [EMAIL PROTECTED]; flexradio@flex-radio.biz> From: [EMAIL PROTECTED]> To:
> [EMAIL PROTECTED]> Subject: Re: [Flexradio] 40m qrm with har
On Nov 29, 2008, at 10:21 AM, David Beumer W0DHB wrote:
Brian
You may be on to something.. I have since found the same pattern at
around 5
Mhz with harmonics in 30m .
I have also found they are in multiples about every 170Khz or so ..
They
swoosh through every 15 seconds or so.
Mulitpl
id Beumer W0DHB
Sent: Saturday, November 29, 2008 1:20 PM
To: 'Lux, James P'; flexradio@flex-radio.biz
Subject: Re: [Flexradio] 40m qrm with harmonics
I'm gonna check that out Jim, I use an Astron RS-35M for the Rig, might be
one of the PC's
Thanks
Dave
-Original Mess
I'm gonna check that out Jim, I use an Astron RS-35M for the Rig, might be
one of the PC's
Thanks
Dave
-Original Message-
From: Lux, James P [mailto:[EMAIL PROTECTED]
Sent: Saturday, November 29, 2008 12:54 PM
To: David Beumer W0DHB
Subject: RE: [Flexradio] 40m qrm with
PROTECTED] On Behalf Of Brian C
Sent: Saturday, November 29, 2008 10:30 AM
To: flexradio@flex-radio.biz
Subject: Re: [Flexradio] 40m qrm with harmonics
Dave, are you hearing an ionosonde? Does it sound like a swooosh that moves
up or down the band every few hours?
http://www.ngdc.noaa.gov/stp
Dave, are you hearing an ionosonde? Does it sound like a swooosh that moves up
or down the band every few hours?
http://www.ngdc.noaa.gov/stp/IONO/ionogram.html> Message: 4> Date: Fri, 28 Nov
2008 > From: "David Beumer W0DHB" > Folks> I'm trying to track down the source
of some nasty QRM that
Ahti
Thank you, I hadn't thought of the UPS..
-Original Message-
From: Ahti Aintila [mailto:[EMAIL PROTECTED]
Sent: Friday, November 28, 2008 10:46 PM
To: David Beumer W0DHB
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] 40m QRM
David,
If you are using any UPS equipment o
David,
If you are using any UPS equipment or any other switched mode power
supplies, try to switch them off.
Ahti OH2RZ
On 29/11/2008, David Beumer W0DHB <[EMAIL PROTECTED]> wrote:
> Folks
>
>
>
> I'm trying to track down the source of some nasty QRM that appears as an
> 4khz wide carrier that me
Folks
I'm trying to track down the source of some nasty QRM that appears as an
4khz wide carrier that meanders through 40m with 2nd ,3rd and 4th harmonics
on 20, 15 and 10. I've got a screen shot of waterfalls of 40m (Top) and
20m(bottom) showing the signal at URL: www.wa3fdb.net/40mQRM.htm
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