My college radio station couldn't get anything like that for it's telco stl until much complaining and insistence that Pac Bell wasn't providing the tariffed stereo service, and that was in 1978. Even after the instituted more than 0db separation between channels, the audio response topped out at about 12K. John Willkie -----Mensaje original----- De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En nombre de Mark Schubin Enviado el: Thursday, November 08, 2007 9:02 AM Para: opendtv@xxxxxxxxxxxxx Asunto: [opendtv] Re: News: Nielsen Gives Fuzzy Picture of HDTV Penetration FYI, the Metropolitan Opera International Radio Network began 15 kHz stereo distribution to 14 cities via AT&T in 1973 using Siemens equipment that substituted one stereo pair for a telco "group" (12 phone calls). TTFN, Mark ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.