2024-08-02 — New 3600 bps Packet Radio Mode for Radios Without Flat Audio, Why M17 Is Significant, ka9q-radio Resources Page, Two New Zero Retries Interesting (Shack) Battery Developments
Always a great source of thinking material. Thanks. I attach a link below from the UK regulator about about Beetlesat. You might find it interesting to see where this is going.
Charles - Interesting! Thanks for letting me know about this - I had not previously heard about BeetleSat. Interesting that they seem to be trying to go head-to-head with Starlink, and I think that given Starlink's very strong incumbent advantage that it won't go well with them, but perhaps there's room for a non-US LEO broadband Internet system... but its country of origin has issues also.
I still don't understand the M17 phenomenon. I've heard the audio quality and it is not so good as other systems. In my opinion the M17 has potential, but it's not described here.
xxx1 - "Beauty" is in the ear of the beholder :-) M17 (or DMR or D-Star or SF or NXDN or P25) isn't for everyone. In truth, its appeal is mostly that it's a true open source solution for Amateur Radio VHF / UHF Digital Voice... and what it COULD become. A lot of additional info has come to me as a result of this week's M17 article, which will appear in the next issue.
I started on a 1200 Baud QPSK AM modem, but being an old man, I fade out pretty fast these days. While I appreciate FM, it seems a missed opportunity not to do QPSK at 3 kHz bandwidth, on 10 meters and Up. Heck, maybe even 20 meters, ha. I had to learn about Timing Error Detection which wore me out. The theory being that no power wasted in a carrier is a good thing.
Hi Steven !
K7IQ
Hi Bob! Good to hear from you OM!
Hi Steve,
Always a great source of thinking material. Thanks. I attach a link below from the UK regulator about about Beetlesat. You might find it interesting to see where this is going.
https://www.ofcom.org.uk/spectrum/space-and-satellites/application-for-non-geostationary-earth-station-network-licence/?utm_medium=email&utm_campaign=Weekly%20publications%20update%202%20August%202024&utm_content=Weekly%20publications%20update%202%20August%202024+CID_6be80f23e66690e9ba45c31315d506fe&utm_source=updates&utm_term=Statement%20NSLComm%20Ltd%20application%20for%20non-geostationary%20earth%20station%20network%20licence
Charles - Interesting! Thanks for letting me know about this - I had not previously heard about BeetleSat. Interesting that they seem to be trying to go head-to-head with Starlink, and I think that given Starlink's very strong incumbent advantage that it won't go well with them, but perhaps there's room for a non-US LEO broadband Internet system... but its country of origin has issues also.
I still don't understand the M17 phenomenon. I've heard the audio quality and it is not so good as other systems. In my opinion the M17 has potential, but it's not described here.
xxx1 - "Beauty" is in the ear of the beholder :-) M17 (or DMR or D-Star or SF or NXDN or P25) isn't for everyone. In truth, its appeal is mostly that it's a true open source solution for Amateur Radio VHF / UHF Digital Voice... and what it COULD become. A lot of additional info has come to me as a result of this week's M17 article, which will appear in the next issue.
I started on a 1200 Baud QPSK AM modem, but being an old man, I fade out pretty fast these days. While I appreciate FM, it seems a missed opportunity not to do QPSK at 3 kHz bandwidth, on 10 meters and Up. Heck, maybe even 20 meters, ha. I had to learn about Timing Error Detection which wore me out. The theory being that no power wasted in a carrier is a good thing.
https://github.com/srsampson/IPNode-new
Steve - Wow, that seems like an interesting project - will mention in this week's Zero Retries.