It had been hoped that the amateur radio SSB/CW satellite HAMSAT (VO-52) would be reactivated on Thursday, March 8 but this has now been postponed.
More time is needed to carry out observations on the state of the satellite, which fell silent Feb. 28, so the activation has been put back by at least a week.
HAMSAT (VO-52) carries two linear transponders for SSB/CW operation. It had been using the Indian transponder but when it is switched back on it will use the Dutch transponder built by William Leijenaar PE1RAH. The frequencies used will be:
Uplink: 435.2250 – 435.2750 MHz SSB/CW
Downlink: 145.9250 – 145.8750 MHz SSB/CW
Beacon: 145.8600 MHz CW
Working the SSB satellites http://www.uk.amsat.org/2712
HAMSAT VO-52 Falls Silent http://www.uk.amsat.org/5217
Leijenaar Electronics http://www.leijenaarelectronics.nl/
AMSAT-India 435/145 MHz Linear Transponder
At Hamfest India (HFI) 2011, held in Kochi Dec 10-11, a presentation was given on a new Indian linear transponder and a CubeSat communications system.
This was the largest gathering of radio amateurs in India so far. Radio Amateurs and SWLs from all over the country and invited guests from other countries enjoyed the two-day event.
AMSAT-India gave several presentations at the event, among them was one by Ganesan Namachivayam KJ6LRR in which he described a satellite 435/145 MHz linear transponder with a bandwidth of 50 kHz and capable of 1-3 watts PEP output. AMSAT-India plan to develop a smaller linear transponder for CubeSats.
Ganesan also described a CubeSat communications system comprising a 435 MHz half-duplex narrow‐band FM transceiver supporting a data rate of 1200-9600 bps. The transmitter produces 1 watt output and can also operate as a Morse Code beacon.
Other presentations included:
- Real Time Tracking by Mani VU2WMY
- Working with LEO Sats by Dr. Raveendranath VU2RVJ
- Telemetry Decoding by Nitin VU3TYG
The slides from the AMSAT-India presentations are at
Hamfest India (HFI) 2011 http://www.hamfestindia2011.com/
AMSAT India http://www.amsatindia.org/