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KU Band Tropo(was Re: pictures)

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  • OZOB99
    (possible duplicate)The Prospect Hill KU dish(below) was used for KU tropo tests to Mt Tug NH: http://www.dtic.mil/dtic/tr/fulltext/u2/a237012.pdf
    Message 1 of 6 , Jul 15, 2013
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      (possible duplicate)The Prospect Hill KU dish(below) was used for KU tropo tests to Mt Tug NH:

      http://www.dtic.mil/dtic/tr/fulltext/u2/a237012.pdf



      --- In coldwarcomms@yahoogroups.com, "David I. Emery" <die@...> wrote:
      >
      > On Wed, Nov 18, 2009 at 01:19:18PM -0800, Jason Bourne wrote:
      >
      > > If I'm not mistaken, there was also a Nike-Hercules radar system in
      > > the vicinity of Waltham as part of the regional air defense system for
      > > MA during the cold war.
      >
      > As someone who is currently sitting in my living room in the
      > next town west of Waltham (Weston) as I type this... and who grew up in
      > the area...
      >
      > Waltham itself did not have any Nike stuff that I remember...
      > there was a Nike battery directly to the west of Waltham in Lincoln Mass
      > and the adjacent town Wayland Mass with the radars for it on a hill in
      > Lincoln that is now a well known nature preserve called Drumlin Farm.
      > In later years of the system the Wayland launcher site did apparently
      > have nuclear warheads at one point I believe.
      >
      > A major search radar site for the system and further battery
      > control radar was located to the south of Lincoln/Wayland/Weston on a
      > hill in Needham Mass, along with additional launchers nearby. Other
      > hills around Boston had other associated radars serving additional
      > launchers near them as well.
      >
      > I remember tours of the Nike sites were given to scouts and
      > school kids... and the weed encrusted remains of the Wayland launcher
      > site existed into the post millennium era - the hilltop radar sites
      > having long since been removed - though I believe some of the buildings
      > at the Needham radar site have been used as a residence/school for
      > disabled children and were not entirely torn down.
      >
      > At one point in the late 60s or early 70s a major hill
      > (Prospect Hill) in Waltham grew a quite large precision Ku band dish
      > (probably 40-60 feet or more) that was prominently visible from the
      > famous Route 128 (now I95). This was used by AFCRL in early
      > feasibility studies of use of Ku and higher frequencies in satcom... and
      > during this era there were a number of small unmanned weather stations
      > along the path of the beam from the dish toward the test satellite to
      > measure local weather conditions (such as rainfall and fog) and how they
      > impacted propagation. This dish was torn down around 2000 or so and the
      > mount and associated building has been reused since as an antenna
      > platform for various two way radio system antennas including some local
      > ham repeaters.
      >
      > Another hill in Waltham (Bear Hill) on the other side of I95/128
      > had one of the very first TD-2 telephone microwave relay sites on it, on
      > the path between Boston and NY that was the first test of a practical
      > telco microwave radio system. The Waltham site was the first hop out of
      > Boston toward NY... and used square delay lens antennas on a 3 story
      > concrete building rooftop rather than Hogg horns on the later tall 300
      > foot traditional AT&T microwave towers. A few years after that route
      > was established in the late 1940s a non AT&T standard much thinner tower
      > was put up next to the TD-2 building for a link north to Portland Maine
      > feed by round dish antennas rather than horns. That tower was torn
      > down at the time most microwave was shut down in the very late 80s...
      > and eventually replaced in the very early 90s by a distinctive tall oil
      > derrick tower - unlike most other AT&T towers - that was apparently used
      > in some kind of experimental 6 GHz cellular system propagation studies
      > in the very early 90s and has mostly been used since as a cell site
      > tower with a smattering of other radio systems on it.
      >
      > The same hill, Bear Hill, also grew towers for a MCI microwave
      > path out of Boston and various other microwave system and still has
      > multiple towers and quite a few active antennas and links on it -
      > including some used for SNG trucks in the west of Boston area for links
      > back to their studios and of course the paging transmitters for the
      > area... the top of the hill has a good view overlooking Boston to the
      > east so it is a natural radio site.
      >
      > Nearby Wayland also had, for many years, a large Raytheon lab
      > that developed radar for the Navy, and there were many experimental and
      > test radars on the roof and grounds of the facility over the years. As
      > a kid growing up in Wayland I was aware (probably more than most other
      > folks) of the RF from the radar testing... it was sufficient from time
      > to time to light up fluorescent tubes in the middle school building I
      > attended classes in on the side of the building facing the radars across
      > the Sudbury river marshes and to cause all kinds of RFI with A/V
      > equipment in school classrooms. That Raytheon facility has long since
      > closed and is in the process of being torn down in the next year or so.
      >
      >
      > --
      > Dave Emery N1PRE/AE, die@... DIE Consulting, Weston, Mass 02493
      > "An empty zombie mind with a forlorn barely readable weatherbeaten
      > 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
      > celebration of what could have been, but wasn't and is not to be now either."
      >
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