If you're like me, upon learning that the local oldies station has a programming track, completely different from what comes over the speaker, hidden in it's signal, you develop an instant need to find out what is there. Once my curiosity was satisfied, I put the decoder I had built in a drawer to gather dust. What I had found tuning it across the FM band was that interesting!
Every few years I will check, just to see what is still there. Each time I find less than I did the last.
The only audio track I can still find is the The Utah Radio Reading Service on 89.1 MHz, 67 KHz sub.
Data streams were once common. Stock prices were one application (I'm not sure of the rest). I used to find these streams on 93.3 MHz, 94.9 MHz, 98.7 MHz, 99.5 MHz, 101.9 MHz, 103.1 MHz, 105.7 MHz, 106.5 MHz, and 107.9 MHz (all subs 67 KHz). On my most recent check, 93.3 MHz was the only one left.
SCA was once the primary method of piping Muzak into stores (and elevators). Today, those businesses have satellite dishes on the roof. The instrumental track and the soft vocals track that I used to find on 94.1 MHz, (67 KHz and 92 KHz subs) are gone.
The Bonneville International LDS Radio Network, was once on 97.1 MHz, 92 KHz sub. Now called BYU Radio, Dish Network is the primary means of reaching their audience.
This page last revised on Wednessday, 21 May 2008.