|Beaconing transmitter currently under development by G0UPL|
In the next few months, the cost and complexity of launching a long-distance balloon will become significantly cheaper. Hans estimates $70.
This will consist of a couple of mylar/foil "party" balloons, helium (available from party stores), miniature solar cells like these and either a AAA battery or a couple of supercapacitors. And of course the transmitter running the appropriate firmware.
|Chip labeled "YIC" is GPS module|
It's this last item that is currently under development by Hans. After a few test flights, Hans plans to offer this tiny transmitter for sale to others wishing to experiment with this project. A few particulars about the transmitter:
- Weight - 1.5 grams
- 20mW RF out
- Any HF band
- WSPR and other digital modes
- Transmits (location, altitude, speed) every 15-20 minutes during daylight; once per hour at night
- Operates on a voltage of 0.5 to 5.5 volts
- "Wakes up" and begins transmitting during daylight in the event of low (< 0.5V) overnight voltage
Those who are interested in the development of this kit and others from Hans can follow the progress via the QRP-Labs forum.