There are several approaches that can be taken with balloons. By design, they do not expand like a weather balloon does. One wants to put in enough lifting gas to make it fly high (mostly to avoid clouds that will bring…
You can, but you may not get the results you're looking for. APRS is a line-of sight signal. In a balloon, you might be heard by transmitters 200 miles or so away. On a boat, I'd expect that range to drop to 50 or less.…
I'm sure people in the UK are doing launches, but it's illegal for them to transmit when flying in UK airspace. In reality, it's an almost unenforcable law to begin with. Most of the WSPR transmissions are on the order…
Airborne transmissions of this sort are not legal over the UK, North Korea, or Yemen. Guessing it's a leftover rule from WW2 in the case of the UK, not sure. These transmitters typically have geofencing routines that…
These are run by solar panels that only transmit during the day. The capacitor just gives a half a minute or so in the event of brief cloud cover, panel not facing the sun at a good angle, etc. Not strictly necessary,…
There are several approaches that can be taken with balloons. By design, they do not expand like a weather balloon does. One wants to put in enough lifting gas to make it fly high (mostly to avoid clouds that will bring…
You can, but you may not get the results you're looking for. APRS is a line-of sight signal. In a balloon, you might be heard by transmitters 200 miles or so away. On a boat, I'd expect that range to drop to 50 or less.…
I'm sure people in the UK are doing launches, but it's illegal for them to transmit when flying in UK airspace. In reality, it's an almost unenforcable law to begin with. Most of the WSPR transmissions are on the order…
Airborne transmissions of this sort are not legal over the UK, North Korea, or Yemen. Guessing it's a leftover rule from WW2 in the case of the UK, not sure. These transmitters typically have geofencing routines that…
These are run by solar panels that only transmit during the day. The capacitor just gives a half a minute or so in the event of brief cloud cover, panel not facing the sun at a good angle, etc. Not strictly necessary,…