Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: What's this odd signal on 60 meters?  (Read 2155 times)
W0BTU
Member

Posts: 1663


WWW

Ignore
« on: June 26, 2012, 05:32:11 PM »

I've been hearing a strange sound on 5.3305 Mhz. It kind of sounds like somebody tapping on a glass of water with a spoon. Anybody know what it might be? Here's a recording:
http://www.w0btu.com/media/60m_5.3305strange_sound.mp2

I don't hear it very well on my dipole. It seems to be loudest to the NE on a 580' Beverage antenna, but I really can't say for a certainty what direction it is from my QTH.
Logged

K9YLI
Member

Posts: 863




Ignore
« Reply #1 on: June 28, 2012, 06:35:13 AM »

   Wild guess...   since  60 meters is a shared  band,,, my guess is it would be  the ''other guys'''
Logged
W0BTU
Member

Posts: 1663


WWW

Ignore
« Reply #2 on: June 28, 2012, 07:16:25 AM »

I was wondering if anyone else has heard it. I didn't hear it yesterday at all.
Logged

K0OD
Member

Posts: 2556




Ignore
« Reply #3 on: June 28, 2012, 08:08:15 AM »

Sound of "tapping a glass of water" and you heard it best on your Beverage? 

Have you checked for a leaky capacitor?
Logged
K0OD
Member

Posts: 2556




Ignore
« Reply #4 on: June 28, 2012, 06:25:58 PM »

Mike, been listening to channel one for quite some time this afternoon. Then I heard a strange sound too... a net. Just what 60 needs. In a half hour, three contacts were made with a maximum distance of about 300 miles.

Over the years I've heard that sound you recorded. Not ham. No doubt from a primary user.
Logged
W0BTU
Member

Posts: 1663


WWW

Ignore
« Reply #5 on: June 28, 2012, 09:17:21 PM »

Thanks, Jeff. I thought possibly the signal I heard was a local one (but I doubt it). I haven't heard it since my original post.

Yes, I heard the net, too. :-(

Propagation has been good there the past two days, during daylight hours! Lots of signals from the east coast and the deep south, plus some in places like northern Wisconsin and western Kansas.
« Last Edit: June 28, 2012, 09:35:34 PM by W0BTU » Logged

K2CMH
Member

Posts: 275




Ignore
« Reply #6 on: July 10, 2012, 12:25:55 PM »

Does anyone actually know who the 'other' users are in more specific terms than just 'government'?  Does anyone know what purpose they are using 60m for?
Logged
W0BTU
Member

Posts: 1663


WWW

Ignore
« Reply #7 on: July 10, 2012, 01:05:04 PM »

Does anyone actually know who the 'other' users ... are using 60m for?

We know of one commercial use, some kind of digital one-way shore-to-ship communications. That's why one of the channels got reassigned earlier this year; the station is based in Louisiana and is heard over a wide area. (If you go to the old channel 5, it's probably still there.)

The last time I listened between our amateur channels (6 months ago), there were signals there. Don't know what they are.
Logged

N0SYA
Member

Posts: 369




Ignore
« Reply #8 on: July 11, 2012, 12:16:15 PM »

Link11

http://www.fas.org/irp/program/disseminate/tadil.htm
http://www.is.northropgrumman.com/products/data_link_processing_and_manag/assets/LMS11Audio.pdf
 
Here ths Link11 sig is being passed via uhf satcom:
http://www.uhf-satcom.com/sounds/link%2011_261.400.WAV
 
Logged

If you have a clumsy child, you make them wear a helmet. If you have death prone children, you keep a few clones of them in your lab.
W0BTU
Member

Posts: 1663


WWW

Ignore
« Reply #9 on: July 11, 2012, 12:19:38 PM »

Thanks, Chris!  Smiley

Since Link11 is military, it goes without saying that we can't use the channel when we hear it being transmitted.

It would be interesting to know where the transmitter is.
« Last Edit: July 11, 2012, 12:36:16 PM by W0BTU » Logged

W0BTU
Member

Posts: 1663


WWW

Ignore
« Reply #10 on: July 11, 2012, 12:30:49 PM »

Does anyone actually know who the 'other' users ... are using 60m for?

Coincidentally, while watching a show on PBS last night (about an island in the Pacific becoming uninhabitable due to rising sea levels), I found another answer to this question.

The natives on that island were apparently using 60 meters to communicate between islands in their nation. They briefly showed the frequency display of the transceiver, and if I saw it correctly, it was either 5.6 or 5.8 MHz.

Sure, that may not be on or between our 5 channels, but it's probably still considered 60 meters.
Logged

Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!