[BC] WWRL- Was - Franklin

[Milton R. Holladay Jr.]

    I know that their radials are/were suspended in air to avoid the
corrosive ground there (IIRC, a pig farm) back when Ben Bartlett was the CE
and Frank Ward (RIP)was the ExVP of Sonderling; they had a WE Doherty and
Harris BC-5 G or H, with a souped up power supply to keep up with what the
WE could do.  A flashlight into Manhattan, or so Frank told me, c.
1970...............
M
----- Original Message ----- 
From: <PeterH5322 at aol.com>
To: <broadcast at radiolists.net>
Sent: Wednesday, July 20, 2005 9:14 PM
Subject: [BC] WWRL- Was - Franklin


>
> >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.