Good one Andy!
Also I believe my memory is at fault - for Beeting read Beeching I
think?
73
On Tue, 2011-12-20 at 14:44 +0000, Andy Talbot wrote:
> 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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> >> email
> >> > in error, please notify the sender upon receipt, and immediately delete
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> >> >
> >>
> >>
> >
> > --
> > 73 es gd dx de pat g4gvw
> > qth nr felixstowe uk
> > (east coast, county of suffolk)
> >
> >
>
--
73 es gd dx de pat g4gvw
qth nr felixstowe uk
(east coast, county of suffolk)
|
