Yet another mystery utility signal to solve–!
by Thomas from The SWLing Post on (#513TX)
Back by popular demand! On our quest to solve UNID utility signals, SWLing Post contributor David Crawford, is asking for help again to ID yet another interval signal. David writes: Here's yet another memorable utili-tune from the deep archives here, again not my recording, origin uncertain. This one has a date, time and frequency on ["]