4 ms·
You also need a very, very good antenna for that sort of stunt. QRP is tough. I'm a licensed HAM radio operator and my Tx has a 5 W final stage, so I fit right
by Florin_Andrei 13y ago
You also need a very, very good antenna for that sort of stunt.
QRP is tough. I'm a licensed HAM radio operator and my Tx has a 5 W final stage, so I fit right into the QRP limits. It's tough. You're at the mercy of the ionosphere all the time.
100 W amplifiers are cheap. :)
- sbierwagen 13y agoPlus he's doing QRSS using WSPR, which transmits at the breakneck pace of 1.46 baud. Supposedly WSPR works down to -28dB. http://en.wikipedia.org/wiki/WSPR_%28amateur_radio_software%29 http://en.wikipedia.org/wiki/WSPR_%28amateur_radio_software%...
- adestefan 13y agoI use a WSPR transmitter that outputs around 200mW on 20m and am easily heard all over North Americdn and Europe. I've also had two South Pacific reports. This was into a poorly tuned dipole at 35ft.
- kd0amg 13y agoYou also need a very, very good antenna for that sort of stunt. For 10mW, sure, but I've done Michigan to France on 5W with a plain old 40m loop 15-20 feet off the ground. In hindsight, I should have tried it on 3W if only to get 1000mi/W on a cloud warmer.