Dan.Strassberg dan.strassberg@att.net
Fri Jan 26 16:16:38 EST 2007

The 1 kW part is patent nonsense! 740 on Long Island has a four-tower
more-or-less in-line array that protects Toronto from daytime skywave.
The station runs either 25 kW or 20 kW days (depending on whether the
CP to slightly modify the pattern and reduce power by 20% is or isn't
on the air). The night power using the day pattern is 40W or maybe
50W. With a two-tower array designed for 740 (as opposed to a diplex
into some existing towers), WJIB might get as much as 50W nights. The
signal could be the equivalent to 100W ND in front of the pattern. I
estimate that WJIB's NIF is about 65 mV/m, however. So the signal
would not cover much acreage. And the site, northwest of Cambridge,
would place the coverage in a less densely populated area than the
current 5W ND night operation. That's assuming that land were
available, which it isn't at either of the two sites (WTTT/WAZN or
WWZN). If you publish your daydreams, you open yourself up to some
serious critiques, and this idea has so many flaws that I just can't
take it seriously.

As for 750, there's an app for the Bangor area that seems almost ready
to be granted if it hasn't yet been granted. 50 kW-D/10 kW-N DA-N
using four towers to produce a teardrop pattern aimed
southeast--protecting WSB and at least one Canadian. This will become
Maine's premiere AM facility from a technical standpoint. A partner in
the applicant company is a well-known broadcast consulting engineer.
There is at least one Canadian to protect to the north and/or east of
Bangor. Even if there were no Bangor application, the Canadian station
or stations would rule out 750 in the Boston area with a pattern aimed
northeast. Once again, if you don't want people to laugh, study the
situation before you make such proposals.

Dan Strassberg (dan.strassberg@att.net)
eFax 1-707-215-6367

----- Original Message ----- 
From: <markwa1ion@aol.com>
To: <boston-radio-interest@rolinin.bostonradio.org>
Sent: Friday, January 26, 2007 1:49 PM
Subject: Re: WJIB

>A two-stick array (nulling towards Toronto) for 740 might allow up to
>1 kW to be run at night from a transmitter site placed at / near /
>between the present 1150 (Lexington) and 1510 (Waltham) sites.
> This would poke a decent lobe into the Allston-Brighton sections of
> Boston and its streetcar western suburbs (Arlington, Belmont,
> Cambridge, Somerville, Watertown, parts of Newton / Brookline) to
> override Toronto much of the time (certainly better than the
> existing 5 watts night power can).  That's a decent number of people
> with money to spend.
> Or, with WHEB long gone from 750, why not a bigger power (5 kW or
> more ?) operation on that lower-interference frequency, with
> suitable nulling towards Leicester (760) and Atlanta (750) ?  A site
> in the Newton or Waltham area (or co-located at 850 in Needham, also
> a decent site) might do the trick.  Much farther west would mean
> poorer Boston coverage and more difficulty with/for WVNE-760.
> On the downside, WJIB morphing into something with much better
> coverage would probably wind up making it some crummy format instead
> of Bob Bittner's delightful and unique present-day offerings.
> For its little 250 watts, WJIB gets out pretty well during the day.
> I heard it with no problem at midday on a car radio from Clark's
> Harbour, Nova Scotia: something like 250-300 miles.  On Cape Cod it
> does OK except along the southern and western sides where it takes
> quite a beating from the Huntington, LI, NY station.
> Mark Connelly - Billerica, MA
> <<
> I've forgotten what the calls of what is now WJIB were before Bob
> owned the station, but whatever the calls were, the station held a
> CP
> for 2.5 kW-D from what is now the WAMG/WBIX-N array in Ashland. With
> those tall towers 2.5 kW would have produced quite a signal and the
> pattern was quite narrow to the east, protecting WVNE. In fact, with
> a
> separate night pattern, Class B operation might have been possible,
> although the CoL would probably have had to be changed to Sherborn
> because given WJIB's NIF, which I estimate to be around 65 mV/m, and
> the low power that might have been granted, Needham is just too far
> away. But it would have been a losing proposition. The initial cost
> would have been very high (maybe $1 million) and the ongoing costs
> for
> the lease of the Tx site would have been a killer for a small
> station.
> Moreover, the site--way west of the center of the market--would have
> canceled out most of the gains from the higher power. If 250W were
> possible at night (and that seems optimistic to me--but with the
> tall
> towers, the station wouldn't have needed that much power to be a
> Class
> B--just an RMS of 140.85 mV/m), the population served would still be
> less than that served by 5W from Fresh Pond Circle.
> -----
> Dan Strassberg (dan.strassberg@att.net)
> eFax 1-707-215-6367
> ________________________________________________________________________
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