Phase out over-the-air signals? (was: Re: WCRB to simulcaston88.7in R.I.)

[Dan.Strassberg]

Can somebody compute the RMS RF output power of a 50-kW AM carrier
amplitude modulated with an audio frequency sinewave to 125% on
positive peaks and 5% on negtive peaks? (Actually, 125% is 225% of the
_amplitude_ of the unmodulated carrier, which means the peak
power--which is proportional to the square of the amplitude--is ~5
times 50 kW.) The input power to a modern solid-state AM transmitter
is probably about 125% of that RMS output power. Multiply by 30.416*24
hours/average month and by $0.20/kW-hour cost of electricity (around
here, anyhow; less in most other parts of the US) and you have your
answer. I believe the power bill comes out to about $10,000/month, but
I could have made a mistake in the math.

-----
Dan Strassberg (dan.strassberg@att.net)
eFax 1-707-215-6367

----- Original Message ----- 
From: "Kevin Vahey" <kvahey@gmail.com>
To: "A. Joseph Ross" <joe@attorneyross.com>;
<boston-radio-interest-bounces@tsornin.BostonRadio.org>;
<boston-radio-interest@lists.BostonRadio.org>
Sent: Friday, June 03, 2011 8:13 PM
Subject: Re: Phase out over-the-air signals? (was: Re: WCRB to
simulcaston88.7in R.I.)


> Scott - Graham - what do you figure it costs to keep a 50K humming
> 24/7??
>
> Clear Channel just must look at 1200 as a nice tax loss...
>
>