To All from PA0SE
Bryan, G3GVB wrote:
The email address for Bauer
doesn't work. is this book available in
English?
My fault! The correct address is [email protected].
The book is not available in English.
73, Dick, PA0SE
Bryan
G3GVB
-----Original Message-----
From: Dick Rollema <[email protected]>
To: [email protected]
<[email protected]>
Cc: Arthur Bauer, PA0AOB <[email protected]>
Date: 26 July 2003 10:53
Subject: Re: LF: Re: Re: LF station in Bavarian Mountains
To All from PA0SE
Matti, OH2ZT wrote:
>In a book Klawitter-Herold-Oexner: "Langwellen- und
Laengstwellenfunk" by
>Siebel Verlag (2000) is a good description of Goliath system pp 47-52
and
>also info about other historical VLF-LF stations.
>
>An extensive description of the Goliath station can also be found in
a
>book written by my good friend Arthur O. Bauer, PA0AOB, of
Amsterdam:
>Funkpeilung als alliierte Waffe gegen deutsche U-Boote 1939 - 1945,
with
>subtitle Wie Schwächen und Versäumnisse bei der Funkführung der
U-Boote
>zum Ausgang der "Schlacht im Atlantik"beigetragen
haben.
The part on the Goliath station is a contribution by Klaus Herold
and
comprises no less than 41 pages. There are block schematic
diagrams,
drawings of the antenna and earth systems, technical data of
transmitter,
valves, antenna and earth system, power supply , cooling system,
site and
even costs of the station. Also seven photographs.
You may also be interested in the reaminig part of the book
and I
therefore list the titles of the chapters:
Vorwort
1. Einleitung
2 Der U-Boot Funkdienst, Amgriffsfläche für den Gegener
3. Ultra versus Enigma
4. Die Funkausrüstung der U-Boote
5. Huff-Duff, ein Durchbruch in der schiffsgestützten Peilung auf
Kurzwellen
6. Die britische HF-Peil-Anlage FH-4
7. Huff-Duff sichert Geleitzüge (Augenzeugenberichte)
8. Die Funkführung der U-Boote in der Praxis
9. Die verschiedenen Arten von U-Boot-Funksprüchen
10. Schlussbetrachtung
Danksagung
Erganzende B eitrage
I. Die Metox-Affaire
II. Das Kurzsignalverfahren Kurier (contribution by Ralph Erskine)
III. Funkverfassung ausserhalb der Schwebunkslücke (contribution by
Klaus
Herold
IV. Der Goilath-Sender (contribution by Klaus Herold
Erklärung von Abkürzungen
Literaturverzeichnis
Anhänge
Quellennachweis
This may look like another commercial on the reflector but let me
assure
you that I have no commercial interest in the book whatsoever.
If you are interested in the book you better contact Arthur Bauer
directly:
[email protected].
73, Dick, PA0SE
>----- Original Message -----
>From: "Hans-Joachim Brandt"
<[email protected]>
>To: <[email protected]>
>Sent: Thursday, July 24, 2003 10:05 PM
>Subject: LF: Re: LF station in Bavarian Mountains
>
>
>Dear Group,
>
>as far as I know, living in eastern Bavaria, just a few concrete
blocks can
>be found on the mountains mentioned, which have carried the antenna
wires.
>
>For more details I guss I had to contact Karl Hille, DL1VU, who
lives
closer
>to that region (he is a true bavarian, older than me, and lives there
since
>a long time).
>
>But concerning the Lorenz Company, they got their chance to build a
VLF
>station at the beginning of the second world war for erecting the
so-called
>"Goliath" station for communication with submarines,
operating at
>16 kHz with 1 MW transmitter output and 50% antenna efficiency,
employing
>the Alexanderson principle. In the "German Museum" in
Munich I have read in
>a book that submarines before New York could copy this station at a
depth
of
>16-20 meters, and at about 8 meters before Japan, using magnetic
aerials.
>
>This station has never been bombed by the allied forces (obviously
they
>wanted to observe the traffic). The book said that at the end of the
war
the
>exciter stages were destroyed by the Germans, later the Russians
rushed in,
>dismantled the station and put the transmitter into acitivity again
in the
>Soviet Union employing russian tubes. Nothing could be said in this
book
>about the condition of the ground system.
>
>HW?
>
>73 Ha-Jo, DJ1ZB
>
>
>"captbrian" <[email protected]> schrieb:
> > Quick ! , - Is it still there ? ;-))
> >
> > Bryan - G3GVB
> > -----Original Message-----
> > From: Dick Rollema <[email protected]>
> > To: LF-Group <[email protected]>
> > Date: 24 July 2003 14:54
> > Subject: LF: FS formula
> >
> >
> > To All from PA0SE
> >
> > William Oorschot, PA0WFO, has sent me a copy of a three part
article by
> > Karl H. Hille, DL1VU, in the German 2002 magazine FUNK:
"Die Bergantenne
>am
> > Herzogstand - Vor 75 Jahren eine technische Grosstat" (The
mountain
>antenna
> > at the Herzogstand - For 75 years a technical amazing
feat). This
>concerns
> > the following.
> >
> > The large VLF stations at Nauen and Eilvese in Germany that
were on the
>air
> > around 1920 were built by Telefunken. The German firm Carl
Lorenz AG
would
> > like to supply VLF stations as well but were unable to do so.
They could
> > supply arc-transmitters of sufficient power but not the
enormous antenna
> > masts they had to offer with the transmitters in order to
compete with
> > Telefunken. Steel masts were unacceptably expensive around 1920
due to
the
> > unbelievable strong inflation that started at the same time
Lorenz began
> > planning the station. So they looked for an alternative. There
was an
> > example. For the VLF link between the Netherlands and the
Netherlands
East
> > Indies (now Indonesia) a large arc-transmitter hand been
constructed at
> > Malabar on the island Java. The antenna hung over a valley
between two
> > mountains, obviating the use of high masts.
> > Lorenz decided to do the same. They strung an antenna between
two
mountain
> > tops in the South of Germany, the mountains were the
Herzogstand at
1735m
> > and the Stein at 940m. The horizontal distance between the
mountain tops
> > was 2700m. About one third from the low end of the
sloping wire an
> > insulator was inserted and a vertical wire connected the part
to the
> > Herzogstand to the transmitter in the valley. So an L-antenna
resulted,
>fed
> > against an extensive earth system, using multiple electrodes in
marsh
land
> > around the station.. The efficiency of this configuration was
found to
be
> > higher than for a T-antenna, in which the whole sloping wire
between the
> > mountain tops was used.
> > Using a 500W valve transmitter strength measurements were
performed over
> > the whole of Germany and the efficiency of the antenna system
was found
to
> > be comparable to the one of Nauen, that consisted of two 250m
masts,
seven
> > 210m masts, two 180m masts and four200m masts.
> > In 1926 the station was ready but it did not become operational
as by
that
> > time it had been found that on short waves a few kilowatt
and a small
> > antenna could provide long distance communication equal to or
even
better
> > than on VLF.
> > The reason I mention all this that the article contains an
interesting
> > formula for field strength at the surface of the earth
around a
vertical
> > antenna. The formula comes from a 1926 publication by M.
Bäumler.
> > (also as attachment).
> > Field Strength.jpg
> > E = field strength in V/m
> > I = current in the current maximum of the antenna.
> > hw = effective height in m.
> > lambda = wave length in m.
> > d = distance in m.
> > j = operator for 90 degrees phase shift.
> >
> > The first part gives the far field; the second part the
electric
component
> > of the near field. The far field diminishes with 1/d, the near
field
with
> > 1/d squared. At 2 wavelength distance the near field is 8% of
the far
> > field, at 4 wavelength 4% and at 16 wavelength 1% of the far
field.
> > It is clear that the formula is only correct over perfect
earth. But at
>the
> > distances where field strength measurements are usually
performed, and
> > certainly at VLF, the influence of the real earth on the field
strength
is
> > negligible.
> > The term effective height is now mostly used in connection with
antennas
> > for reception.
> >
> > Now an example:
> > A vertical antenna of 20m at 136kHz has an effective height of
10m and a
> > radiation resistance of 0.028 ohm.
> > To radiate 1kW the current must be 189A. The wavelength is
2205m.
Entering
> > these figures into the formula we find the far field at 1km
distance to
be
> > 0.323V/m, which compares well with the 300mV/m that is given by
the CCIR
> > curves for ground wave propagation.
> >
> > 73, Dick, PA0SE
> > JN22GD
> >
> >
> >
|
