RE: [amsat-bb] Hellschreiber via satellite

[Tony Langdon <tlangdon@xxxxxxxxxxxxxxxxxx>]

Hmm, sounds like a good idea. :-)  That's one mode I haven't yet played
with.

Tony Langdon.
Systems Development and Support.
ATC Training Australasia.  Level 2 321 Exhibition St Melbourne  3000.
Phone:  1300 13 1983     WWW:  http://www.atctraining.com.au


> -----Original Message-----
> From: Tony AB2CJ [mailto:ab2cj@nais.com]
> Sent: Tuesday, 3 October 2000 18:58
> To: _AMSAT_list (E-mail)
> Subject: [amsat-bb] Hellschreiber via satellite
> 
> 
> Greetings
> 
> For those interested in keyboard modes like RTTY via satellite...
> Hellschreiber
> is an alternative mode that has less impact on a satellites 
> power budget
> than
> RTTY or even CW! The Feld Hell mode has a duty cycle of 23% 
> and does very
> well with doppler. It also seems to have greater sensitivity 
> than RTTY.
> Peter Klein
> and I have experimented with this mode via satellite and have 
> found it to
> work
> very well.
> 
> I've put together a few screenshots of full-duplex 
> experiments via FO-20 and
> OSCAR -10.  http://users.nais.com/~ab2cj/sathell.htm .
> 
> 73, Tony
> AB2CJ
> 
> 
> 
> 
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