"RHF" wrote in message
oups.com...
On Mar 31, 8:18 pm, "David Eduardo" wrote:

Were 100% digital to be done on AM, there would be considerable savings
in
terms of percentage... the digital power will not likely be even half the
analog power, and digital is vastly more efficient than AM transmitters,
especially when you add in things like cooling, size of transmitter
building, etc. Interestingly, in many stations of 5 kw and less, the
power
consumption of the tower lights, A/C, the equipment rack, security cams
and
system, security lighting, etc., ends up being more than the transmitter
itself. In fact, just the beacons on a 1 kw directional use more power
than
the transmitter!

DE - The Reality is that -if- a 1% Digital Signal will cover the
same 10mv/m Contour as the 100% Analog Signal : Radio
Stations will in-time Crank-Up the ERP of the "HD" Digital
Signal and Turn-Down the ERP of the Analog Signal.

This is not an even exchange. It is like two stations on one channel, not
one trading power from another. FMs could, for example, increase power by 10
db and not cause significant additional interference. I expect a filing on
this soon. I don't know any work being done on increasing AM power, but it
would seem likely after the night operations get started as a second step,
probably with night parameters.

Turning down the analog is not feasable until at least 80% or more of
receivers ared digital, just due to econ0omics.