GIN, GIP, etc

[Brian Vita]

How do you detune a tower?

----- Original Message ----- 
From: "Dan Strassberg" <dan.strassberg@att.net>
To: "Laurence Glavin" <lglavin@lycos.com>
Cc: <boston-radio-interest@khavrinen.lcs.mit.edu>
Sent: Thursday, February 19, 2004 6:41 PM
Subject: Re: GIN, GIP, etc


> Well, 1540 in Newport RI (only a little further from WPTR than Exeter) is
> authorized 3W at night, BUT has just applied for 20 kW nights using a
> three-tower DA. 20 kW!!! The nighttime interference-free contour was
> calculated at 95.5 mV/m (probably higher than any other US or Canadian
> station), so even with 20 kW directional, WADK won't fully cover Newport
at
> night. And there are other fascinating technical goodies in the
application.
> WADK's existing tower is half wave. WADK proposes to detune the top half
of
> it at night to reduce its electrical length to 90 degrees. I assume this
is
> being done to make it easier to control high-angle radiation, which is
> important due to the short spacing to WPTR. That's the first instance I
know
> of of electrically detuning PART of a tower at night only. Many stations
> that don't use certain towers by day or by night detune the unused towers
> when they are not in use, but they detune the entire tower--not just the
> upper half. And there are probably other stations that detune parts of
> towers all of the time, but I've never heard of a station detuning part of
a
> tower part of the time.
>
> --
> Dan Strassberg, dan.strassberg@att.net
> eFax 707-215-6367
>
> ----- Original Message -----
> From: Laurence Glavin <lglavin@lycos.com>
> To: Joseph Pappalardo <joepappalardo2001@yahoo.com>;
> <boston-radio-interest@rolinin.BostonRadio.org>; Scott Fybush
> <scott@fybush.com>
> Sent: Thursday, February 19, 2004 5:47 PM
> Subject: Re: GIN, GIP, etc
>
>
> > >DATE: Thu, 19 Feb 2004 17:14:36
> > >From: Scott Fybush <scott@fybush.com>
> > >To: Joseph Pappalardo
>
<joepappalardo2001@yahoo.com>,<boston-radio->interest@rolinin.BostonRadio.or
> g>
> >
> > >At 03:04 PM 2/19/2004 -0500, Joseph Pappalardo wrote:
> > >>Does anyone know if 1540, 930 & 610AM in NH are simulcast all the
time?
> Or
> > >>just certain programs?
> > >>
> > >>Thanks
> > >>
> > >>JP
> > >
> > >I think those three are 24/7 simulcast now. WTSL 1400 Lebanon NH is
23/7
> > >simulcast with WGIR - it breaks off for one hour (9-10 AM weekdays) for
> > >local talk.
> > >
> > >s
> > >
> > Isn't AM 1540 a strict daytimer, or does it have
> > butterfly-breath nighttime power?
> >
> > Laurence Glavin
> >
> >
> >
> > ____________________________________________________________
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