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I heard the transmission yesterday using a e-field probe at about 20ft high with earth spike and Spectrum lab software on a laptop.
Difficult to make an exact measure of the signal to noise but probably of order of 3dB or more.
I noticed some instability in transmission frequency towards the end.
At start it was very stable.
Difficult to give exact figure but looks like + or – 25Hz on Spectrum lab waterfall display.
A distinct slow wiggle as your system brings it back to the centre frequency.
I have a photo but not sure how to add it.