The amazing power of low power!
This is unbelievable! Transmitting 200mW on 15 metres, 21.0946MHz, with a mobile whip standing on the floor, taped to the table. No ground plane and surrounded by metal objects! If you don’t have the space for a decent outside antenna, this WSPR (weak signal propagation reporter) result is encouraging. I also use JS8 Call, another low power digital program for keyboard to keyboard chat.
1/9/25. 1100 hours:
Heard in Frankfurt, Germany!
The mobile whip antenna standing on the floor, taped to the table. I didn’t think I’d be heard anywhere.
COVERING THE WORLD WITH WSPR!
11/9/25. 1600 hours:
Using my Icom IC-7300, I’m now running 10 Watts into my doublet on 21MHz (30 metres long and 10 metres high). Take a look at the map below. I’m being heard all over the world! Check out the call sign DP0POL, the ship near Greenland. Also, DP0GVN, the research station down in Antarctica.
Main WSPR page.