Noticed a warbling tone on 137.79 when I returned from town around 17.00 and
guessed it might be you.
Coherent sync'-ed up straight away without using grab, your usual test loop
of 16 chars.
This time managed to see it on spectrogram. Low resolution is best. Looks
like a string of beads of different sizes, i.e. the carrier splits into two
about 10 Hz apart for a short duration and then comes back together.
Fascinating to watch.
What power are you using? It would be interesting to see how sync is
maintained if you step the power progressively lower.
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