https://web.archive.org/web/20210905130639/http://physics.princeton.edu/pulsar/K1JT/wspr.html
https://web.archive.org/web/20210724073833/https://physics.princeton.edu//pulsar/K1JT/WSPR2_r1714.EXE
https://web.archive.org/web/20210905130639/http://physics.princeton.edu/pulsar/K1JT/WSPR2.12_r3617.EXE |