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Date: Tue, 20 Dec 2011 14:44:59 +0000
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From: Andy Talbot <andy.g4jnt@gmail.com>
To: rsgb_lf_group@blacksheep.org, ukmicrowaves@yahoogroups.com
Subject: Re: LF: Re: RE: Antenna ideas for Stefan
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Don't joke.
I once read a report about how (sometime in the 1960's it probably
was)  an entire spare UK power station was run up to around 55Hz and
run into a grid line grounded at the far end to generate a test signal
at ULF for DX submarine comms.    Use of the railway system (third
rail) was also being contemplated.

This was not an April report, but a genuine test.  Haven't a clue what
the findings were, and the UK never did develop a ULF capability,  but
they must have been exciting days to be in MoD / Government research.
Unlike latter years :-(

'jnt



On 20 December 2011 13:21, g4gvw <g4gvw@aol.com> wrote:
> 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 na=
med
>> 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 on=
ce 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 don=
e 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 power=
ful
>> > 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 Telefunke=
n
>> high
>> > frequency alternator transmitters although what made this station
>> > exceptional was the two enormous 2.4 Mega-Watt arc transmitters for di=
rect
>> > communication with Holland de Groot installed. The first of these
>> > transmitters went into service in May 1923 operating on a wavelength o=
f
>> > 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 delay=
s in
>> > the supply of vital components. An aeroplane engine and the motor from=
 an
>> > electric tram found their way into the installation whilst more perman=
ent
>> > solutions were being sought. One particular factor that made such a
>> powerful
>> > station possible was the mountainous terrain on the island of Java. Th=
e
>> 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 w=
ave
>> > 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. =A0"
>> >
>> >
>> >
>> >
>> > Paul Reeves =A0 =A0 =A0 =A0 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=3DU2&doc=3DGetTRDoc.pdf&AD=
=3DAD02850
>> > 55
>> >
>> >
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>> > in error, please notify the sender upon receipt, and immediately delet=
e it
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>> >
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>> >
>>
>>
>
> --
> 73 es gd dx de pat g4gvw
> =A0qth nr felixstowe uk
> (east coast, county of suffolk)
>
>