[BC] 1130s - Was: 50 kW Values

[PeterH5322]

>We (WISN) actually had a CP for 25kW nights.  We still have a Potomac 
>for 12 towers and to land to do it.  I think they were trying to do it 
>with 9 towers.  They never could get the null to Minneapolis to be 
>within specs.  I bet with the new computer programs we could now however 

A computer program which could do this is possibly based upon one which 
was published in a 1969 issue of IEEE Transactions on Broadcasting, but 
also possibly on my ca. 1965 computer program, which was unpublished. 
Both were FORTRAN ... the former being FORTRAN IV, the latter being the 
much earlier FORTRAN II.

WISN's 10 kW night array is a "multiplication method" design, which is 
also true of the other 1130 night arrays: the ones in Detroit and 
Minneapolis.

Very slight, but very well-chosen changes to the field ratios and the 
phasings are what allowed for the type of optimization which ... in the 
hands of the right consultant ... was successful in moving Detroit's WLQV 
from a licensed 12-tower "critical" array at 5 kW, to a licensed 9-tower 
critical array at 3 kW, to a proposed 9-tower non-critical array at 5 kW, 
and to its present licensed 9-tower non-critical array at 10 kW, all this 
without moving any towers ... other than those which were deleted when 
the land under those three was sold to K-Mart.

I have no doubt that 25 kW nights is possible at WISN, given the right 
consultant. Whether the present nine would be sufficient, or three new 
towers would be required is open to speculation. I would bet that nine is 
a distinct possibility.

Certainly, CC has the time and the money to pull this off. All CC might 
lack is the will to do so.

As null optimization was the biggest challenge at WLQV, and as this 
appears to be WISN's issue as well, you might want to approach the same 
consultant as WLQV used, although any of the "name" consultants likely 
could do the job equally well.

Use of the two, more "primitive" computer programs mentioned above is not 
essential, although the IEEE-published one is certainly free, and is 
available for experimentation. In the right hands, it would likely be 
successful. You probably can get a reprint of that article from U of W's 
engineering library in Madison.

Also likely, one of the "name" consultants would use the more modern 
"cluster" computing concept, not a mainframe computer as did the two 
FORTRAN programs mentioned above.