Trying another approach than just stating that it is nearly impossible to
cross the pond on 136kHz I contacted some VO stations that are active on
80/160 and asked them if they wre interested in LF.
I got a positive reply from VO1GO, Jerry, and asked him (as a first test)
to listen for DCF39 and other signal in the 130-150kHz segment.
Here is his responce :

Here are some more observations of my listening.  At 0522 UTC,  rtty
stations on 130kHz : 559, 133kHz : 589, 137kHz : 569 and 139kHz : 549-559.

All the above signals are received with a TS140S and a 80m dipole used a
T-antenna (dipole as topload, coax as vertical) but NOT tuned to 136kHz

I assume that the 139kHz signal heard was DCF39 and the 137kHz was CHF, who
has any clue about the 130kHz and 133kHz signals ?

Currently Gerry is not 'computerized' in his shack so he can not try QRSS
or DFCW recepeption. But encouraged by the result he will contact a group
of MW DX-ers in Newfoundland who might be better equipped for LF reception.

So, let's focus on some practical tests and be optimistic (remember : the
'proffesional men' were ridiculizing the attempts of the 'amateur boys' to
cross the atlantic on shortwave in the 1920's ... until the amateurs proved
that they were right).

73, Rik  ON7YD