WWZN and Kinstar antennas
Tue May 9 20:57:57 EDT 2006
So my guess is that if you ignore the first adjacents, WWZN has a
really, really low NIF (maybe less than 3 mV/m). But since WTWP and
WWKB don't protect WWZN at all, they together might easily raise WWZN's
NIF to 25 mV/m or more.
What happens to WWZN's NIF if night IBOC (HD) is authorized for
WTWP-1500 or WWKB-1520 ?
It won't be a pretty picture. The frequency will sound like an
unlubricated Ronco Shred-O-Matic.
A move of WWZN to the WMKI site will put it within a mile of its old
Squantum St. home. Certainly 50 kW ND day from there would be better
than what they have now. Since southwest towards Nashville is the
major night null direction, listeners in places like the Norwood
Automile would get a much poorer signal after sunset.
I think that if there was a way to get WWZN into the Oak Park (Newton)
tower complex, that would even make more sense. It's wet marshy flat
land (admittedly fresh water) and close to the city. A convincing case
could be made to get 890, 1060, 1150, 1470, and 1550 in there too.
Maybe throw in little 650 while we're at it. Downside: neighbors
wouldn't be too happy about the site turning into Boston's version of
the NJ Meadowlands.
The 1150/1470 Lexington site is even poorer than 1510's site: Belmont
Hill (a.k.a. Wellington Hill) and Turkey Hill - Arlington are in front
of it on bearings east and northeast. Try to get either 1150 or 1470
in somewhere like Danvers at night ... forget about it. At least
1510's profile going east is fairly flat and somewhat damp. It's
hideous to the west and northwest though, right through rocky ledge.
890 and 1060 are Boston station wannabe's, might as well get them into
1200's new Newton home: closer to downtown while still hitting some of
If those Kinstar antennas didn't need the full-book ground radials,
they could be installed atop large water tanks or skyscrapers. I guess
height doesn't do that much for AM, but a Kinstar atop the Hancock
Tower or Pru would probably still make some noise if some of the
building metal could act as a sort of ground. I suppose the antenna
still wouldn't do as if it was in a salt-marsh though. Too bad nobody
ever grabbed that perfect location at the mouth of the North River
where 3A crosses from Marshfield into Scituate. Signals really pick up
when you drive through there.
Mark Connelly - Billerica, MA
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