There are always third world countries... I know the local TV-2 TX is a little too 'hot' for my 6M repeater. ;->
But ohhh... to think of a Megawatt 6M machine... then to think of the electric bill... Joe M. DCFluX 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 > 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 > >
