HB9FGK's blog

I use an Ultimate 3 with a 10db attenuator. The transmission power is 10dBm (measured with oscilloscope to be sure).
With this power, the signal traveled 13,145 km, or 1,314,500 km per watt.

2020-02-10 20:00 HB9FGK 10.140113 -28 0 JN37kb 0.01 DP0GVN IB59ui 13145 186

WSPR is very fun !