Message-ID: <8E8D23D235D70840B6582917DF27898013DCA5F7@temps153538.tms-ltd.com>
From: Reeves Paul <Paul.Reeves@uk.thalesgroup.com>
To: "'rsgb_lf_group@blacksheep.org'" <rsgb_lf_group@blacksheep.org>
Date: Mon, 19 Dec 2011 14:28:22 -0000
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Subject: LF: RE: Antenna ideas for Stefan
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As usual the Americans had not read the history books. Someone had done it
before. The following extract comes courtesy of G4KHU.

" From the writings of a very distinguished
author..................................

 

On the island of Java, in what was then the Dutch East Indies, a powerful
long wave transmitting station was erected at Malabar near Bandung by an
engineer of the name Dr ir C.J. de Groot. He was responsible for the design
and construction of the station and also the installation of Telefunken high
frequency alternator transmitters although what made this station
exceptional was the two enormous 2.4 Mega-Watt arc transmitters for direct
communication with Holland de Groot installed. The first of these
transmitters went into service in May 1923 operating on a wavelength of
15,600 metres (19.2 kHz). 

The Malabar station was a remarkable installation being constructed in the
tropics far away from the industrial and scientific centres in Europe where
many of its component parts were manufactured. De Groot had to employ a
number of innovations to overcome obstacles such as shortages or delays in
the supply of vital components. An aeroplane engine and the motor from an
electric tram found their way into the installation whilst more permanent
solutions were being sought. One particular factor that made such a powerful
station possible was the mountainous terrain on the island of Java. The long
wave antenna was supported between two mountain ridges giving it an
elevation of around 700 metres and making it one of the tallest long wave
antennas ever to be built. De Groot had experience with Telefunken equipment
and many of the wireless station parts were manufactured in Holland or
Germany giving a good indication of the capabilities of Marconi's
competitors. The Netherlands 'home' station was built at Kootwijk in central
Holland. It also used Telefunken technology but due to delays in the
commencement of its construction was not ready for service until after the
Malabar station had been completed.  "




Paul Reeves         G8GJA



-----Original Message-----
From: Dexter McIntyre W4DEX [mailto:dexter.mc@gmail.com] 
Sent: 18 December 2011 15:16
To: rsgb_lf_group@blacksheep.org
Subject: LF: Antenna ideas for Stefan

http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=AD02850
55 


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