From: g4gvw <g4gvw@aol.com>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <002001ccbe60$48f22b70$0401a8c0@xphd97xgq27nyf>
References:
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	 <002001ccbe60$48f22b70$0401a8c0@xphd97xgq27nyf>
Date: Tue, 20 Dec 2011 13:21:59 +0000
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Subject: Re: LF: Re: RE: Antenna ideas for Stefan
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Paul,

Some of us older radio amateurs should recall the well documented
achievements of G9BF recorded in a well known radio magazine. His
adoption of several long-established techniques would suggest that UK
radio amateurs would have been involved in far more extensive systems on
a wide range of frequencies years in advance of the mentioned reports!
These techniques, I recall, could involve using the whole of the
National Electricity Grid balanced against the pre-Dr.Beeting railway
network as radiating systems together with DC power supplies obtained
from his local town's street-lighting system. G9BF was also memorable
for peppering his speech with CW abreviations and phrasing - an
affectation not unknown in certain quarters and by personalities in lf
groups!

73



On Mon, 2011-12-19 at 15:10 +0000, mal hamilton wrote:
> But the Germans had an even bigger one which was kept Secret and code named
> the Boneshaker built BC
> This caused Earth Wobble, Earth quakes and started the first Volcano
> According to gossip on 80 metres it is still operational and fired up once a
> year during April !!
> Check it out Paul
> 
> ----- Original Message -----
> From: "Reeves Paul" <Paul.Reeves@uk.thalesgroup.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Monday, December 19, 2011 2:28 PM
> Subject: LF: RE: Antenna ideas for Stefan
> 
> 
> > 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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> 
> 

-- 
73 es gd dx de pat g4gvw
 qth nr felixstowe uk
(east coast, county of suffolk)