As an experiment tomorrow, I may leave the PA turned off on my 10m WSPR TX beacon. It is pre-programmed to say 0.5W, but I would guess the actual power out is microwatts. I must check the difference on a spectrum analyser.
My guess is some single digit reports of me might still be copied if my PA was off. Today, there were several such reports. I guess it also depends on the RX station having a low noise floor.
UPDATE 2150z: Using my TinySA spectrum analyser, it looks like the TX is 30dB weaker with the PA turned off, so the output is about 500uW. I wonder how many will be able to spot this on Wednesday?
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