[amsat-bb] WSJT-X FT8 QSO confirmed between W2JAZ and W5RKN on FO-29

Andrew Rich vk4tec at tech-software.net
Tue Oct 17 03:51:38 UTC 2017

I would have thought doppler would have killed a frequency dependant mode

Your sending a hf low noise mode over an FM bird ?


Sent from my iPhone

> On 17 Oct 2017, at 1:47 pm, Clayton Coleman <kayakfishtx at gmail.com> wrote:
> Some may think it is experimental but I personally find it very
> disruptive to use certain digital modes on satellites.  It is more
> disturbing when the stations performing these "experiments" fail to
> minimize their station ERP to a reasonable level.
> Tonight on FO-29 I witnessed first hand how disruptive it is when a
> station decides to experiment with MSK144 while others are trying to
> use the shared transponder resource.
> Some of these modes are 100% duty cycle for periods, then switch off,
> and back on again in a sequence.  This doesn't seem very compatible
> with your typical satellite transponder.
> For the life of me I cannot figure out why someone would even think
> about attempting these modes on AO-7 when the transponder's more
> sensitive nature is common knowledge.
> 73
> Clayton
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

More information about the AMSAT-BB mailing list