Looks like the previous QSO between Mitch and Larry was QRSS. Not sure if
they made it after this using CW.
This report from the ARRL site archive.
Canadian lowfers report first 136 kHz QSO: Larry Kayser,
VA3LK, and Mitch Powell, VE3OT, report that, despite poor to medium conditions,
they successfully completed the first two-way QSO in Canada on 136 kHz at 1400
UTC on July 22. The distance was 431 km (268 miles). The pair used very
slow-speed CW--QRSS--where dits are 3 seconds long and dahs are 9 seconds long!
VA3LK and VE3OT have received special letters of authorization for LF testing
and evaluation. Frequency range is 135.7 to 137.8, emissions permitted include
CW, FSK and BPSK at a bandwidth of up to 3 kHz. Powell says VA3LK is operating
on 137.710 kHz and he is on 137.780 kHz. More information on LF Amateur Radio is
available on the
Radio Amateurs of Canada
Web site.
--Mitch Powell, VE3OT/RAC