How does he do that...? - Digital Forum at eHam.net

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eHam.net Forum : Digital : How does he do that...?

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How does he do that...?	Reply
by G0RIF on June 26, 2009	Mail this to a friend!
I was checking out 20m PSK31 last night and I saw these unusual traces on my screen - the first time I've seen anything like this done before... http://blog.dean-barnes.com/2009/06/26/psk31-symbols/ How do you think he does that? I did try and ask him on the air last night but I suspect my question might not have survived translation. Regards, Dean - G0RIF

RE: How does he do that...?	Reply
by G0GQK on June 26, 2009	Mail this to a friend!
Its possible to do this with HRD. Most of us hope it doesn't catch on. G0GQK

RE: How does he do that...?	Reply
by KG4RUL on June 26, 2009	Mail this to a friend!
Also possible with MixW software. This is like creating a fax image on paper by mapping the bits to tones which appear on the waterfall.

RE: How does he do that...?	Reply
by AA6YQ on June 26, 2009	Mail this to a friend!
The mode is called Hellschreiber or Feldhellschreiber (abbreviated Hell) and has been around for a very long time: <http://en.wikipedia.org/wiki/Hellschreiber> 73, Dave, AA6YQ

RE: How does he do that...?	Reply
by G0RIF on June 27, 2009	Mail this to a friend!
Ah, ok...a bit of Hellschreiber - well that puts that to bed then. Thanks for the input and as Melvyn says, I'm in the 'hope it doesn't catch on' camp. Regards, Dean - G0RIF

RE: How does he do that...?	Reply
by WW5AA on June 30, 2009	Mail this to a friend!
http://www.nonstopsystems.com/radio/frank_radio_hell.htm Lets all do a little reading on a historic digital mode before condemning it. Kind of like telling AM or a CW ops that we hope it doesn’t catch on! 73 de Lindy

RE: How does he do that...?	Reply
by G0RIF on June 30, 2009	Mail this to a friend!
Lindy, I think you misunderstand me. I'm not saying that I hope Hellschreiber doesn't catch on - only that the habit of preceeding PSK transmissions with Hell symbols doesn't catch on. That'd be analogous to bellowing "CQ" on phone before sending -.-. --.- on CW. I intend giving Hellschreiber a go because it looks to me like a fun mode. I just don't think it has a place in the PSK waterfall. Just my 2 cents. Cheers, Dean

RE: How does he do that...?	Reply
by WW5AA on June 30, 2009	Mail this to a friend!
I agree Dean. I should have looked at the link first. 73 de Lindy

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