[50mhz] [VHF] Name this sound

[Les Rayburn]

David,

Now that you’ve experienced decoding these signals, I hope you’ll consider making a few contacts too. It’s easy to get started, and as you’ve seen random contacts happen every day on the calling frequency of 50.260. Or you can coordinate an attempt with a friendly station on www.pingjockey.net 

I recommend reading the mail on Ping Jockey for a day or two, and learning the lingo. Then reach out to a station about 600-800 miles away, which is optimum for Meteor Scatter and ask them to try a contact. Most experienced MS guys will be happy to walk you through the first contact. To be a valid contact, you can’t exchange any information online during the contact, but for the first attempt don’t worry about getting one in the logbook, just learning the process. It’s easy and fun. 

Not only does it give you something fun to do during the long winter dry spell, but it offers smaller stations (like mine) a chance to work stations that might otherwise be impossible. 2 Meters is more of a challenge, but WSJT can still make contacts possible year-round. 

73,

Les Rayburn, N1LF
EM63nf
121 Mayfair Park
Maylene, AL 35114

6M VUCC #1712
Grid Bandit #222



From: David Kozinn, K2DBK 
Sent: Thursday, January 27, 2011 8:12 AM
To: Joe 
Cc: 50mhz at mailman.qth.net ; vhf at w6yx.stanford.edu 
Subject: Re: [VHF] Name this sound

Again, thanks to all for helping, and as I noted (some may have missed the
message), it was indeed ISCAT. If you've never listened, it does sound very
different from FSK441 which is actually what I was expecting to hear there.
In fact, after the signal went away, I did hear some FSK441 (also from a
relatively local ham, it was MS) and was able to decode that as well.

Thanks for the interesting diversion into the world of weak-signal digital
modes.

73,
     David, K2DBK
     k2dbk.com
     k2dbk.blogspot.com


On Thu, Jan 27, 2011 at 6:11 AM, Joe <jbarkley at truvista.net> wrote:

>  Sounds like ISCAT. I have not used it but it is in the mode selection
> in the WSJT 9.0 version.
> Joe
> KI4TZ
>
> David Kozinn, K2DBK wrote:
>
> This evening, I've heard a sound on 50.260 that I haven't been able to
> identify. I'm not familiar with all the digital modes so this might be
> something relatively simple, but I couldn't find a clip online that matched
> it, nor could I figure out which of the many modes available in DM780 (part
> of Ham Radio Deluxe) could decode it. The audio lasts for just under 30
> seconds and seems to repeat after 30 seconds of silence, so I was thinking
> it might be a weak-signal mode but it's very wide and didn't match anything
> in WSJT that I could find either.
>
> Rather than try to describe it, I've posted a full "cycle" of the sound up
> on my website (since I didn't know if I could post an attachment here).
> Here's the link: http://k2dbk.com/50.260.mp3
>
> Can someone let me know what this is? Thanks!
>
> 73,
>      David, K2DBK
>      k2dbk.com
>      k2dbk.blogspot.com
>
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