While listening to my TR-4 late yesterday evening, I noticed that the lower bands had a prominent, continuous "swish-swish-swish" noise at about 2 or 3 Hz. I checked and I was also getting that on my R-390 so, thankfully, it didn't appear to be a new problem with my TR-4.
Are others on the list hearing this as well? It's noise that I don't recall hearing before and, possibly as a result of it, I didn't hear very much activity on the lower bands either.
Just curious.
Thanks,
Barry - N4BUQ