Re: Nova Scotia Boston DX

[ehenness@natick-amed02.army.mil]

I said:

> Bob says that that gives 'BZ an ERP of 100kw to the west; given 
>the way the signal bombs across the eastern US, I can believe that.

And Dan Strassberg replies:

>100 kW is conservative. Given that most stations use less efficient 
antennas
>(the minimum efficiency for most classes of AMs is 175 
mV/m/kW--unattenuated
>at 1 mile) and WBZ (and nearly all other Class Is) uses half-wave towers,
>which produce in excess of 240 mv/m/kW, the effect is more like 200 kW.

I would guess that WBZ is slightly less efficient than that, because I 
believe their Hull towers are actually half-wave at their pre-NARBA 
frequency (990, I think).  I suppose it doesn't matter all that much in the 
long run.

Ed Hennessy

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