Topband: Speaking of Noises...

[Jeff Kincaid]

Interesting thought, Jim, but you have lost the context.  What I was listening to was Tim's recording.
'JK
 

    On Friday, February 23, 2018 4:01 PM, Jim Jim <wa3mej at comcast.net> wrote:
 

  Jeff,  try turning off all of the Cell phones located near your receiver (and maybe in the house)  This sounds like the sound of a Cell phone polling the local tower that I had several years ago  it often drives me nuts because my wife' phone sometimes gets into the receiver as well. 

Jim K3YBN



Message: 4
Date: Thu, 22 Feb 2018 19:03:03 +0000 (UTC)
From: Jeff Kincaid <w6jk at sbcglobal.net>
To: Tim Shoppa <tshoppa at gmail.com>, "ws6x.ars at gmail.com"
 <ws6x.ars at gmail.com>
Cc: topBand List <topband at contesting.com>
Subject: Re: Topband: Speaking of Noises...
Message-ID: <587619042.4047365.1519326183396 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8

I think I'm hearing two groups of four bursts, with the first burst from the second transmitter coinciding with the last burst from the first transmitter.? Anyone agree?
Jeff W6JK 

    On Thursday, February 22, 2018 10:51 AM, Tim Shoppa <tshoppa at gmail.com> wrote:
 

 Here is a recording (made on 80M a few years ago but sounds substantially
the same on 160M) of what I'm told is the Wallops Island Ionosonde:

http://n3qe.org/wumwum_80M.wav

Here is the waveform showing 4 louder cycles followed by three softer
cycles:

http://n3qe.org/wumwum.png

If you look at the second panel of the waveform, you see a 20Hz
substructure in the pulses.

Even though I'm sitting in once place with a 2.4kHz filter making this
recording, I understand that the actual spectrum occupied is wider and it
cycles through the bands repeating on a several minute cycle.

Tim N3QE