[BC] WWRL- Was - Franklin

[PeterH5322@aol.com]

>OK so Let me ask the group this   what type tower is used over at 1600 
>in Jersey 
>that looks like a 4 tower Franklin with the Insulators Half way Up Or 
>is that actually 2 stations Stacked on top of Each other..  and Not 
>duplexed. you know the 4 towers  north of Rt 3 going into NYC.

Sect=1
A=180.40
B=34.60
C=0
D=0

For all four radiators.

So, each radiator is 180.40 degrees with 34.60 degrees of top-loading, 
for a total electrical height of 215.0 degrees.

No Franklins there.

However, if those radiators were a real 240 degrees, not a top-loaded 215 
degrees, a 120 over 120 ... a short Franklin-type radiator ... might make 
some sense at a higher power level, and with a better ground conductivity 
on Long Island.

At least for the night pattern, based on the theoretical RMS and 5 kW 
input, the array's efficiency is 410.23 mV/m/kW at 1 km, which is pretty 
darn good, and seems reasonable for a well designed array with 215 degree 
towers.

As 200 degrees, ND, will produce about 405 mV/m/kW at 1 km; and as 225 
degrees, ND, will produce about 440 mV/m/kW at 1 km; 215 degrees, ND, 
could be expected to produce about 426 mV/m/kW at 1 km.

So, the numbers appear to add up.

Taller than 180 degrees and you start to get a "skylobe", but the ground 
conductivity on Long Island is so poor the ground wave is gone, anyway, 
before the "skylobe" starts to become a consideration.

Probably a good choice to use comparatively tall towers, as Manhattan is 
pretty close to the Tx site while suburban NYC, on Long Island, is 
already in an area where you couldn't penetrate it even if you had 50 kW 
on 1600, from a NJ site.