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Future Plans for Transponder at Weekends

by on April 7, 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 AMSAT-BB.

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 below, or email g3wgm -at- A recent QSO made by Paulo PV8DX can be seen at Thanks for the report, Paulo!

73s Jim G3WGM
7 Apr 2014.

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