4.811 mHz noise?
 

Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second. I'm
suspicious, because I can hear it about S3 during the day, so I'm
thinking local. (Perhaps my gas or electric company's remote read
digital meters?)

QTH is Raleigh, NC
Drake R8
ANC-4
TTFD
Horizontal Loop

-j

4.811 mHz noise?
 

JoanD'arcRoast wrote:

Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second. I'm
suspicious, because I can hear it about S3 during the day, so I'm
thinking local. (Perhaps my gas or electric company's remote read
digital meters?)

Most likely CODAR.

4.811 mHz noise?
 

wrote in message
...
On Dec 10, 9:43 am, JoanD'arcRoast wrote:
Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second. I'm
suspicious, because I can hear it about S3 during the day, so I'm
thinking local. (Perhaps my gas or electric company's remote read
digital meters?)

QTH is Raleigh, NC
Drake R8
ANC-4
TTFD
Horizontal Loop

-j

If it is codar, you can put the radio on sideband and move the VFO
around. The sweep is wider than your typical sideband filter.

The codar frequencies show up in the FCC database.

CODAR are experimental licenses so on-line you have to look for those at
fcc.gov.
(Your meter readers use 900 MHz.)

4.811 mHz noise?
 

In article kVi7j.1525$CJ.405@trndny02, Janitor Boy Jr
wrote:

On Mon, 10 Dec 2007 12:43:46 -0500, JoanD'arcRoast tossed this out for all
to see:

Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second. I'm
suspicious, because I can hear it about S3 during the day, so I'm thinking
local. (Perhaps my gas or electric company's remote read digital meters?)


got the same thing here.
S9+
NE Wisconsin

Thanks. That rules out local.

(Are you in Green Bay? Go Packers! [I was raised in SE Wisconsin:
Whitewater area... Back when Lombardi was king.])

-j

4.811 mHz noise?
 

In article _Am7j.5605$rB1.524@trnddc03, David L. Wilson
wrote:

wrote in message
...
On Dec 10, 9:43 am, JoanD'arcRoast wrote:
Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second. I'm
suspicious, because I can hear it about S3 during the day, so I'm
thinking local. (Perhaps my gas or electric company's remote read
digital meters?)

QTH is Raleigh, NC
Drake R8
ANC-4
TTFD
Horizontal Loop

-j

If it is codar, you can put the radio on sideband and move the VFO
around. The sweep is wider than your typical sideband filter.

The codar frequencies show up in the FCC database.

CODAR are experimental licenses so on-line you have to look for those at
fcc.gov.
(Your meter readers use 900 MHz.)

Thanks for the info. Couldn't find anything at fcc.gov, but I'll keep
looking...

-j

4.811 mHz noise?
 

On Dec 11, 10:51 pm, JoanD'arcRoast wrote:
In article _Am7j.5605$rB1.524@trnddc03, David L. Wilson



wrote:
wrote in message
...
On Dec 10, 9:43 am, JoanD'arcRoast wrote:
Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second. I'm
suspicious, because I can hear it about S3 during the day, so I'm
thinking local. (Perhaps my gas or electric company's remote read
digital meters?)

QTH is Raleigh, NC
Drake R8
ANC-4
TTFD
Horizontal Loop

-j

If it is codar, you can put the radio on sideband and move the VFO
around. The sweep is wider than your typical sideband filter.

The codar frequencies show up in the FCC database.

CODAR are experimental licenses so on-line you have to look for those at
fcc.gov.
(Your meter readers use 900 MHz.)

Thanks for the info. Couldn't find anything at fcc.gov, but I'll keep
looking...

-j
For background information
http://www.codaros.com

I found an expired codar license for WA2XEJ

4.811 mHz noise?
 

In article UJP7j.3236$1p.2018@trndny01, Janitor Boy Jr
wrote:

On Wed, 12 Dec 2007 01:51:21 -0500, JoanD'arcRoast tossed this out for all
to see:

In article kVi7j.1525$CJ.405@trndny02, Janitor Boy Jr
wrote:

On Mon, 10 Dec 2007 12:43:46 -0500, JoanD'arcRoast tossed this out for
all to see:

Anyone else receiving this? In AM, sounds like a low breathy note on a
flute. In sideband, sounds like a sweeping chirp - once per second.
I'm suspicious, because I can hear it about S3 during the day, so I'm
thinking local. (Perhaps my gas or electric company's remote read
digital meters?)


got the same thing here.
S9+
NE Wisconsin

Thanks. That rules out local.

(Are you in Green Bay? Go Packers! [I was raised in SE Wisconsin:
Whitewater area... Back when Lombardi was king.])


a bit NW of Green Bay.
booooooo Packers!

Your eloquent and concise argument has completely changed my mind. I
now truly believe that the Packers suck. Especially Favre.
WooHoo---Suckage!

Back to topic: There's another noisy note from 4.877-4.902. Over S5 at
19:48Z

Weak one from 4.916-4.936. S1 @ 19:58Z

Big one from 4.963-4.995. S5+ @ 20:00Z

WWV is S1 on 5mHz this time of day.

4.734-4.766. S3 @ 20:04Z

Two of them overlap 4.530 S6 @20:06Z

The first one mentioned at 4.810 is an overlap of two, as well. S6 @
20:06Z

I don't see any CODAR installations on Lake Michigan.

-j

4.811 mHz noise?
 

JoanD'arcRoast wrote:
snip

Back to topic: There's another noisy note from 4.877-4.902. Over S5 at
19:48Z


Perhaps this deserves some attention from folks in this N.G.; there
are a number of online receivers to use in chasing this signal.
I went to http://adamsj.dynalias.org/RCSweb/ in North Carolina
and at about 2045 UTC the signal on 4800 kHz was 20/S9.
I recorded 30 seconds of the audio using these settings:

mode: USB, filter: 2100 Hz, AGC: slow

Listen he http://www.cybertheque.org/ham/audio/4800chirp1.mp3

I am not hearing it here in No. MN.

For other readers, please take the time to use some of the online
receivers and check for it in other locations.

Perhaps also use other modes and filter settings and perhaps
submit it to spectral analysis.

Report here ;-)

Michael

4.811 mHz noise?
 

msg wrote:

JoanD'arcRoast wrote:
snip

Back to topic: There's another noisy note from 4.877-4.902. Over S5 at
19:48Z


Perhaps this deserves some attention from folks in this N.G.; there
are a number of online receivers to use in chasing this signal.
I went to http://adamsj.dynalias.org/RCSweb/ in North Carolina
and at about 2045 UTC the signal on 4800 kHz was 20/S9.

snip

It's 40/S9 right now at the same QTH at 2110 UTC

Michael

4.811 mHz noise?
 

msg wrote:
JoanD'arcRoast wrote:
snip

Back to topic: There's another noisy note from 4.877-4.902. Over S5 at
19:48Z


Perhaps this deserves some attention from folks in this N.G.; there
are a number of online receivers to use in chasing this signal.
I went to http://adamsj.dynalias.org/RCSweb/ in North Carolina
and at about 2045 UTC the signal on 4800 kHz was 20/S9.
I recorded 30 seconds of the audio using these settings:

mode: USB, filter: 2100 Hz, AGC: slow


snip

I changed the files as follows:

4800kHz, SW, 8kHz filter: http://www.cybertheque.org/ham/audio...w_8khzFilt.mp3

4800kHz, AM, 8kHz filter: http://www.cybertheque.org/ham/audio...m_8khzFilt.mp3

Another user of the North Carolina receiver said the freq. maps to a USN Tactical
(beacon?) usage in a UTE list.

Please listen to these clips and tell me if this is what you are hearing on the freqs.
and in the locations previously posted.

Regards,

Michael