WSPR 2.1 for I/Q SDRs

WSPR 2.1 r2194 has been posted at:

Instead of listing the essential changes since r2179, I direct you to the document "WSPR 2.1: Supplement to User’s Guide" now posted online at

Briefly stated, the new version has complete facilities for Tx and Rx image suppression. I measure the unwanted sidebands more than 60 dB down, with my SoftRock.

As far as I know, I have now corrected all reported bugs. If not, please let me know! As always, I will appreciate all bug reports and suggestions.

-- 73, Joe, K1JT