Quote:
Originally Posted by bicker
A UHF channel broadcasting at 1000 kW ERP reaches just about as far as a VHF channel broadcasting at 30 kW ERP. So many channels elected to move back to their old VHF channel, once they turned off their analog signals, to reduce their electricity bill by 97%. |
Most now agree that 40
KW is a minimum VHF power, but closer to 50 to 60
KW is better.
Most VHF stations have an over all gain of about 5
db, so if they want 50
KW they need a
TPO of about 16KW to get 50KW
ERP
Most UHF stations are at least 8 to 10
db of system gain. This means they need a
TPO of 100 to 160
KW to achieve 1000
KW ERP.
That gives a savings of a 85 to 92 % savings in power, still significant, including the fact that at UHF transmitters are not as efficient as at VHF.
Quote:
Originally Posted by bicker
However, personally, I think those channels should admit they were wrong, and file for a permit to move back to UHF, before all the slots available are issued to other broadcasters.
|
In many places such as Los Angeles there are no more UHF channels. NE corridor of the US is in the same boat. No more channels. They can't move back in some area's to their UHF.
The example above they can't move back to channels 65 and 66 as those are no longer even TV channels.
