Here are clips from the first and the latest audible instances of "PIE/B FL" as copied in SE Kansas. There have been a few others in between, and lots of visual-only sightings of the keying sidebands, many at levels which would have yielded decent QRSS copy.The June 7 Argo capture illustrates the approximately 2-3 minute QSB cycle that is common to 22 meters at certain times, while the June 19 MP3 is afflicted with the 3-6 second rapid-fading cycle that chopped up the ID into fragments that read like "/B" then "PI /B" and "L" or "FL" and so on. On the 19th I recorded from 2:01 to 2:27 PM CDT, but the minute sampled for attachment here is the only one that included so many recognizable bits of code.
Carrier frequency has generally maintained between 13564.505 and .535 kHz each time I've looked. Receive setup is a Kenwood TS-590 with TXCO reference, fed from the 40-foot top hatted vertical antenna without the usual buffer amp ahead of the coax. (The latter situation precludes LF reception, but that would be poor right now anyway. On the plus side, not having its power inserter in the transmission line route greatly reduces ground loop intrusion of noise from the temporary field computer's charger!)
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File Attachment 1: pie19jun.mp3
File Attachment 2: pie-slices.jpg
File Attachment 3: pie7jun.mp3