Tag Archives: TRANSPONDER

May 22 2024

AMSAT Argentina to launch transponder balloon

AMSAT-LU Launching a High Altitude BalloonOn May 26, at 1300 GMT AMSAT-LU plans (weather permitting) to launch a balloon carrying a linear multimode transponder V➤U, CW, SSB, FM, APRS LU7AA-11 and VIDEO.

It could last 9 hours if it reaches 82,000 feet height landing in Uruguay, or 6 hours landing at Gualeguaychú. The flight has been approved by ANAC/EANA.

Flight forecast: http://lu7aa.org/pronostico.asp?callsign=LU7AA-12

An attempt will also be made to launch LU8YY PicoBalloon emitting WSPR at 20m, if the winds help it could go around the world.

In Merlo, from May 24 to 26, presentations will be made to schools and universities. Depending on the weather it could be launched on May 25.

This experience will provide 4 FM channels + 3 CW + 3 SSB + 1 digital channel and 1 SSTV, all simultaneous. It will allow field testing on a balloon the future satellite platforms planned by AMSAT Argentina.

For latest updates check http://amsat.org.ar/?f=merlo

Sep 20 2013

PSK-31 Transponder Needed for Launch Opportunity

PCSAT2 PSK-31 Transponder

PCSAT2 PSK-31 Transponder – Image credit Bob Bruninga WB4APR

On the AMSAT Bulletin Board (AMSAT-BB) Bob Bruninga WB4APR writes:

If someone will build a linear PSK-31 transponder, I have a launch opportunity in 9 months.

All it needs to be is a PSK-31 Linear receiver on 28.120 MHz (3 kHz bandwidth) with AGC coupled to a downlink UHF FM transmitter of about 1 Watt. Should fit on a 3.5″ square card. This is the same as Brno University of Technology has built for prior missions of PCSAT2 on the ISS back in 2006 and the two on the shelf awaiting flights.

Flight delivery by May 2014 (9 months from now).

Brno University, may not have the people to make a third one for this new flight opportunity.

Just a thought for someone looking for a project.

PSK-31 Transponder Concept http://www.usna.edu/Users/aero/bruninga/psk31uplink.html

AMSAT-BB http://www.amsat.org/amsat-new/tools/maillist/