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I'm looking for a reliable, however cheap solution for ground-space communication. I need at least 50W of transmitted power with 2GFSK modulation at 70cm band (433 MHz). Transmission will be done between earth's surface and a cubesat on LEO at 9600bps.

  • What should I be looking for?
  • Is SDR + amplifier a good solution?
  • Or should I aim at transceivers with capability of transmitting 50W with 2GFSK modulation (if any like that exist), or
  • maybe should I aim for creating my own solution?
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    $\begingroup$ Sorry, but we don't allow questions which are purely requests for product recommendations. $\endgroup$ – Kevin Reid AG6YO Feb 8 at 21:05
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    $\begingroup$ @KevinReidAG6YO Reworded the question, I hope this works now. I'm really desperate about this information. $\endgroup$ – leller Feb 8 at 21:15
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    $\begingroup$ I'm not familiar wtih 2GFSK, but other forms of FSK can be accomplished with an SSB (or all-mode) transceiver which would be capable of 50W, That's assuming that transmitting on that frequency at that power is legal in your area. $\endgroup$ – Duston Feb 8 at 22:01
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    $\begingroup$ You neglected to state the required symbol rate and deviation for your application. How will you interface the data to the transmitter? $\endgroup$ – Glenn W9IQ Feb 9 at 5:10
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    $\begingroup$ As a communications engineer, when someone approaches me with "I have already decided on a band, and on a modulation, and on a minimum power, now I need a transmitter", I go "hmmm. I don't know what solves your problem, but I can virtually guarantee that you've started to specify at the wrong end of your system". Instead of asking us where/how to get a 50W GFSK transmitter, maybe start with "Hi, I want to {application} over {distance}, within the constraints that it needs to {requirements}. Far as I can see, the minimum net data rate needs to be {rate}.". Could you add that to your question? $\endgroup$ – Marcus Müller Feb 9 at 10:31

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