I am thinking a really nice 6M repeater for some of the old Chan 2 stuff. Vern
On Mon, 7 Jan 2008 18:49:27 -0700 DCFluX <[EMAIL PROTECTED]> wrote: > I am more concerned about what happens to the old analog >iron and the > antenna. There is a limited market for something >considered obsolete by the > entire nation. > > On 1/7/08, Hap Griffin <[EMAIL PROTECTED]> wrote: >> >> Not really. With the huge power in NTSC analog signals >>around the visual >> and aural carriers, as well as the color subcarrier, >>stations had to be >> geographically far apart to be able to share channels. >> Even odd channel >> pairings such as the "taboo" relationships whereby >>stations could not >> operate close together if they were on pairs differing >>by 8 channels (8 x 6 >> MHz = 48 MHz which falls in the receivers' IF passbands) >>could not be used. >> The high powers concentrated at the visual carriers even >>required adjacent >> stations to shift their frequencies by 10 KHz. Digital >>transmitters operate >> with generally lower power and that power is noise-like, >>spead evenly across >> each 6 MHz channel. With the inherent error checking >>and correction power >> built into the ATSC digital television system, >>digital-into-digital >> interference is much less of a problem than >>analog-into-analog >> interference was. Therefore, it is possible to cram all >>1600 broadcast >> stations into less spectrum with digital. It could not >>have been done with >> analog. >> >> Digital reception is amazing. At WRLK in Columbia, SC, >>we are running 650 >> kilowatts ERP on analog on channel 35, and >>simultaneously from the same >> antenna, 65 kilowatts of digital on channel 32. The >>digital station can be >> received perfectly at locations where the analog station >>is unwatchable in >> the snow. Once the analog transmitters can be turned >>off, broadcasters' >> electric bills will be MUCH less than they are today. >> My eleven station >> network pays over a half million $$$ in electrical costs >>per year. We >> expect it to be cut to about one third of that after >>next year. >> >> Hap Griffin >> WZ4O >> >> >> ----- Original Message ----- >> *From:* MCH <[EMAIL PROTECTED]> >> *To:* Repeater-Builder@yahoogroups.com >> *Sent:* Monday, January 07, 2008 6:04 PM >> *Subject:* Re: [Repeater-Builder] Re: Off Topic (but >>with on topic >> questions): NTIA propaganda >> >> But, how is that related to the transition to digital? >>The same could >> have happened with simple channel reassignment. >> >> Joe M. >> >> Hap Griffin wrote: >> > >> > Actually, there will be a huge amount of spectrum >>freed up. Currently, >> the >> > television allocation is from channel 2 through >>channel 69. After >> February >> > 2009, all analog operation will cease and all of the >>digital stations >> will >> > be occulying only the channels 2 through 51. Thus, >>eighteen 6-MHz >> channels >> > will be freed up, or a total of 108 MHz. >> > >> > Hap Griffin >> > WZ4O >> >> >>
