[BC] More Tower DA's

[PeterH5322]

>But in its early days to read the end towers on each end of the system 
>required killing of the audio in order to read base current ratios within 
>licensed 
>values. So we installed audio mute buttons in each tower allowing the 
>cutting 
>audio for readings.

In a classically designed array, the field ratios are such that the end 
towers are very low power.

Which is why six-tower in-lines are so rare.

Certainly, stable six-tower in-lines are rare as the end towers have 
about 1/100 the power of the interior towers.

And a seven-tower in-line, although applied for, was never, to my 
knowledge, ever constructed.

Modern array designs attempt to use fewer or more towers in unusual 
configuations (see WXYT, for but one example), usually with each tower 
having about the same power, or roughly so.

Note that in WXYT's case, the reference tower is 1.0, whereas the 
lowest-powered tower is 0.47, which is the odd one, #3, which seems out 
of place.

For, if one considers only 1, 2 and 4 through 9, all towers are between 
0.681 and 1.0.