[amsat-bb] FUNcube/AO-73 Transponder plans for the future

Jim Heck jimlist at zoho.com
Mon Apr 7 08:57:01 PDT 2014

Hi Folks,

Following the 48 hour test last weekend, we have concluded that the battery
temp does reduce slightly during full time transponder mode, but only by a
degree C or so; it remains within specification. Hence we have decided in
future to switch the satellite into 'forced eclipse mode', ie full time
transponder and low power beacon at weekends. The aim is to significantly
increase the availability of the transponder to radio amateurs. We will
continue with this plan until further notice.

We plan to switch to full time transponder mode during the first suitable
pass over the UK on Friday evenings, normally between 19:30 and 22:30 UTC.
If for some reason this is not possible, then the switch will be done on the
first suitable pass on Saturday, normally between 09:30 and 12:00 UTC. We
plan to switch the full time transponder mode off during a suitable pass on
Sunday evenings (UK time), which normally occur between 1930 and 22:30 UTC.
Again, if this is not possible the switch off will be made on Monday
mornings, approx. 09:30 to 12:00 UTC.

Do PLEASE NOTE that this schedule is totally reliant on the availability of
command stations, who will do their very best to ensure it is maintained. We
will not normally announce successful full time transponder mode on/off
commands, but if it proves not possible to make one of them, then we will
make a note here and on the FUNcube web site at www.funcube.org.uk/news.

So please do enjoy the transponder, and use it any time you hear it on. We
are always pleased to hear of your activity, so either leave a comment on
the website, or email g3wgm -at- amsat.org. A recent QSO made by Paulo PV8DX
can be seen at http://www.youtube.com/watch?v=nMVetMKnCMQ. Thanks for the
report, Paulo!

73s Jim G3WGM
 7 Apr 2014.

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