RE: 1060 testing at higher power

[dan.strassberg@worldnet.att.net]

Yes the null to the northeast (centered at 52 degrees to 
protect 1050 in New York City) is pretty deep all right 
(I think I once figured the equivalent power to be 
around 3 kW), but I would not say that about the null to 
the southwest (232 degrees). The minimum field intensity 
in that direction is about 70% of the pattern RMS, or an 
inverse-distance field about 2000 mV/m at 1 km. That's 
the equivalent of 50 kW ND into a radiator having the 
minimum efficiency for class B stations. KYW is, of 
course, a Class A and must have greater efficiency, but 
the signal in the southwest null is still equivalent to 
about 25 kW into a radiator having the minimum 
efficiency for Class A AMs. I suspect that in that null, 
KYW is regularly heard at night 600 miles from 
Philadelphia.

> KYW's signal is a "peanut" pattern that runs almost exactly Northwest to
> Southeast with Deep Nulls Northeast and Southwest from the two tower array.
> 
> --MIKE
> 
> 
> 
> >         Where is KYW's 0.5 mV/m 50% skywave contour in this direction? I'm
> > thinking that if I hear so much as a whisper at night from WMEX/1060 (is
> > that the correct calls?) down here, I'll give WBZ a letter to use.
> >
> >
> >
>