The recent tests with the 'big' decca antenna and the 'small' inverted-L
were were interesting (BTW : I can confirm that the signal on the small
antenna was stronger).

The tests raised an old question again : do (some of) our antennas produce
horizontal polarisation at 136kHz ?

Theory says that with a low vertical wire over a perfect ground the
horizontal signal is canceled out, due to the fact that the 'mirror' is in
counterphase.
But what happens in the real world, where ground is far from perfect ?
So far I have not found any clue about that. All literature on LF-antennas
I have only handles vertical polarisation.

Can anyone point me to literature that includes horizontal polarisation on
LF or have there ever been measurements on horizontal polarization ?

Fact is that stations with long (ad low) horizontal wires (ie. OH1TN,
DJ9IE) produce very strong signals, but that only indicates that they
effecient antennas, not nessecarily horizontal polarized.

73, Rik  ON7YD