[BC] Unique Arrays - (Update)

[PeterH5322]

>I think there's one of those low-end short tower arrays in Craig Colorado 
>(KRAI).  I also seem to recall passing one somewhere in the Plains States 
>(could it have been Salina Kansas?)

Fortunately, for this array we have ND data available for comparative 
analysis.

ND efficiency is 289.68 mV/m/kW at 1 km, which is slightly higher than 
the minimum for the class, 281 mV/m/kW at 1 km.

DA-N efficiency, 284.26 mV/m/kW at 1 km, is less than ND efficiency, 
indicating that no "squishing" is being used.

Although there indeed are nulls in either side of the tower's axis, these 
nulls are a consequence of the very wide tower-to-tower spacing, 276 
degrees.

In order to implement "squishing" the tower-to-tower spacing must be 
within about 90 to 130 degrees, and the nulls, usually two per side, must 
be intentionally placed "normal", or nearly so, to the tower axis, not 
simply as a consequence of wide spacing.

"Squishing" of slightly asymmetric arrays is also possible, and works 
about as well as with in-line arrays.