Ya, definitely not what I thought it would be
Well there's always nostalgic collections of interval signals on YouTube
https://www.youtube.com/watch?v=sf_UzdvTyKQ I logged and received QSL cards for most of these stations back in the 70's. Anyone else ?
My radio roots started listening to the ?shortwaves?. I have several QSL?s from commercial and military stations running ?test transmissions?, generally above 17 mhz. ?This is a test transmission for circuit adjustment purposes ?? AT&T and RCA were the dominant players. AM BCB DXing was also lots of fun.