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 <[email protected]> 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 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" <[email protected]>
>> To: <[email protected]>
>> 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:[email protected]]
>> > Sent: 18 December 2011 15:16
>> > To: [email protected]
>> > 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)
>
>
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