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Hellshcreiber on FO-20



Greetings to all

I'll be QRV on FO-20 in Feld Hell, Hellschreiber mode at 18:58 UTC, February
5th on 435.880. This pass provides a good window for east coast US to west
coast Europe.

I've been experimenting with the Feld Hell mode via satellite by recording
my own downlink signal. The results with the FO birds have produce near 100%
print.  Doppler tuning is not nearly as sensitive as PSK31 and the spectrum
window provided in the software alows for easy tuning.

 Hellschreiber operates at a low duty cycle of 21% and uses on-off keying
like cw to produce rows of dots that form charactors.  The low duty cycle is
a plus for satellite work in that it will not tax the satellites power
budget like RTTY and other modes. The bandwidth is similar to 80 wpm morse
at about 300hz.

Reception reports with screenshots of received print, by DIRECT e-mail would
be greatly appreciated.  ab2cj@nais.com

More info on this mode and the soundcard software can be found at the
following web sites.

 Info - http://www.qsl.net/zl1bpu/      Software -
http://www.freeweb.org/varie/ninopo/iz8bly/Hell/index.htm

73, Tony
AB2CJ






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