28:37 Has there been any work on making a NPR-70 derivate for that band? The chip used does it fine. The 70cm module in the common radios likely has some output on 219MHz as is, just not optimal.
I had the same thought about this being a good alternative band for New Packet Radio. For my locale, 70cm is incredibly noisy at times, with rain-drenched vegetation causing some attenuation in the suburban and rural areas. As far as I am aware, the symbol rates for VHF and UHF are still in place, so the 70cm limits of 100kHz bandwidth and 56k are identical to the 219MHz band restrictions. All that would need to change is the radio hardware, I believe.
Just what MODE are we talking about? Keep seeing presentations about moving large amounts of data, but what data are we manipulating? Is it simply Packet? Or what are we doing with the packets?
Pretty much anything we usually send via relay. You can work others live via digitpeaters, move radiogram or email traffic, telemetry, or weather data.
Thanks
28:37 Has there been any work on making a NPR-70 derivate for that band?
The chip used does it fine. The 70cm module in the common radios likely has some output on 219MHz as is, just not optimal.
Not that we know of, but perhaps someone reading through the comments might know?
I had the same thought about this being a good alternative band for New Packet Radio. For my locale, 70cm is incredibly noisy at times, with rain-drenched vegetation causing some attenuation in the suburban and rural areas.
As far as I am aware, the symbol rates for VHF and UHF are still in place, so the 70cm limits of 100kHz bandwidth and 56k are identical to the 219MHz band restrictions. All that would need to change is the radio hardware, I believe.
@@coreymckay4433 Symbol rate rule went away (we worked on that too).
Just what MODE are we talking about? Keep seeing presentations about moving large amounts of data, but what data are we manipulating? Is it simply Packet? Or what are we doing with the packets?
Pretty much anything we usually send via relay. You can work others live via digitpeaters, move radiogram or email traffic, telemetry, or weather data.
@@Anabasis75WinLink RF backbone network, perhaps?
220-222 Mhz is used for en.wikipedia.org/wiki/Positive_train_control
Thank you for the pointer.
PTC is in 217-219 MHz as well, due to AMTS licenses being leased out to railroad entities.