Re: [IRCA] Power vs tower

["Bill Harms" <wharms@xxxxxxxxxxxxxx>]

KFYR, in 1981, claimed to have "The largest daylight coverage area of 
any station in the United States" on its QSL card.  
http://qsl.philcobill.com/mw/usa/KFYR_Bismarck_550a.jpg

If that is true, then the coverage area of CBK 540 must be HUGE. I 
remember hearing them regularly in Spokane in the daytime even in the 
summer, and I believe that Pat Martin hears them regularly in Oregon. 
I also understand that they have been heard in the daytime in 
Oklahoma (John Bryant?).

Bill Harms 

On 4 Feb 2007 at 22:08, Craig Healy wrote:

> > Is it true that lower freq daytime signals travel
> > further than higher ones since stations on the lower
> > end seem to come in stronger than ones at the top with
> > the same power from the same location,(disrgarding
> > signal direction),because the wave length is longer on
> > the lower freqs? Also I thought that stations on lower
> > channels used higher towers,while shorter towers were
> > used by stations radiating shorter waves,but I see
> > that does not always apply in every case. Bill in Vic.
> 
> It is a matter of ground conductivity.  The US FCC ground conductivity
> charts show this in clear detail.  I saw a breakout once that a 250w station
> on 540 covers about as well as a 50kw station at 1600.  In practice, it is
> very noticeable.
> 
> For example, one of my clients is WDDZ-550 in Providence.  At 1kw
> non-directional, they are good for about a 50 or more mile radius.  Another
> client is WXBR-1460 which is 5kw non-directional.  WDDZ-550 covers
> significantly better.
> 
> I have that chart somewhere, but doubt I can lay my hands on it any time
> soon.  If I do, I'll post it.
> 
> Craig Healy
> Providence, RI
> 

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