My beacon is back to full power (500mW). It was turned on at 0914z. So far (at 0919z) no spots.
UPDATE 1230z: No spots at all, despite a reset on timing. I am suspicious.
UPDATE 1345z: My coax was open circuit - now fixed. It means my 500uW tests these last few days were invalid, so I may repeat these.
UPDATE 1348z: 5 immediate spots. The PA has been working into an open circuit all morning!
UPDATE 1356z: At 1354z I turned the beacon PA off so the output is about 500uW. This time, I have an antenna connected!!
UPDATE 1530z: No spots with 500uW. I shall run at this power if I am around. Interesting test.