Using a Zachtek multiband WSPR transmitter from the beach 

Good report. Interesting.

Well done, Peter.

My Zachtek 80to10 is on the way. I was also considering a series pad, but maybe just -3dB for 6dB return loss. I'd love to also get on 136 and 474 kHz WSPR, but I'll need to invent a more practical antenna first.