In article ,
"Michael A. Terrell" wrote:

Telamon wrote:

In article ,
"Brenda Ann" wrote:

"David" wrote in message
...
On 18 May 2006 09:16:29 -0700, "RHF"
wrote:

SbSw,

"I think it would be cool to have long wave (LW) broadcasters
in the USA. Ten 2 megawatt stations, on 10 frequencies, evenly
spaced across the country would cover the entire lower 48 day
and night."

i like that idea ~ RHF
.
That's absurd. A satellite covers the whole country and uses
way less energy.


Yes, and a satellite also requires a directional antenna and
special receiver (and a subscription). Putting LW into standard
radios would cost almost nothing, and add little to the cost of a
portable radio.

How much energy did it take to put the satellite into orbit? How
much power is used in the uplink effort?

-- Telamon Ventura, California


The actual uplink is usually in the 10 to 25 watt region for
video,
and it would take less for a narrow audio only signal. An all solid
state microwave transmitter would only consume a few hundred watts.
The studio equipment would use more energy than the uplink. BTW, i
have been trying to track down the owner of an abandoned C-band video
confrencing earth station that was built by Microdyne. I want the
equipment because the system is serial number one, and the only
uplink they ever built.

I figured a few hundred watts for uplink power of the final PA but as
you mention there are facilities that need to be supported along with
the uplink dish. People are often surprised at how much power is
consumed by support facilities for the electronics, lights and air
conditioning. I have managed facilities that consume 100 KW and did not
transmit any signal, just lights, electronic equipment, air
conditioning, and heating.

People tend to forget the cost of putting the satellite into orbit.
This is a cost that can not be ignored either.

I don't know where you go looking for C band uplink equipment.

--
Telamon
Ventura, California