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Beginning of wireless in Germany.
First German transmitter and receiver tests by professor Slaby and count Arco

Shock excitation transmitter
Online since 08/30/97. Last update 08/09/2007
Diese Seite in deutsch.

Near Berlin and Potsdam is situated the small village Sacrow. In August 1897 professor Slaby and count Arco and installed here the first German antenna on the tower of the "Heiland" church in Sacrow. Even today a memorial plaque points out to this event.

The first transmitter tests already took place in Berlin before. In June 1897 the first wireless connections were executed between the "Technische Hochschule Charlottenburg" and the "Chemische Fabrik Beringer". Distance 500 meters.

More information about professor Slaby and count Arco you will find here.


Heilands-Kirche (church) in Sacrow


Tower of the church. Here was installed the antenna wire.


Memorial plaque


100. Anniversary: Transmitting - attempt of Prof. Slaby and count Arco!

At the church of Sacrow the transmitting - attempt was repeated at that 08/30/97 successfully. The transmitter and receiver were reconstructed. In German 'Funk' means the same as 'wireless'. Funk is the word for spark , sparking. The first transmitters were sparking gap transmitters. So a wireless station or a transmitter is in German a 'Funk-Sender' (Sparking transmitter). Also modern tube or transistor transmitters are called Funk-Sender.

These memorial experiments were worked out under participation of the "Deutsches Technik-Museum Berlin". It was very impressive to see and to hear the sparks of the inductor transmitter.

The reception station was built 1.6 km away at the so called "sailor house". From there the reception was confirmed via amateur radio. The sparks could be received also in portable radio sets.

* More information about Slabys experiments you will find in the book "Voyages of discovery into the electrical ocean" (Entdeckungsfahrten in den elektrischen Ozean) of 1911. I own a copy and keep it in honors.


Cover of the book.
The photo of the tower is a glued real photo.


The sparking gap section of the transmitter.
(A drawing of Slaby's book)


During the anniverary ceremony.
During the anniverary ceremony. In the background the church tower with the antenna.


The reconstructed inductor transmitter.


The sparking gap section


The coherer receiver and tapper


Close up: Coherer and tapper


View from the receiver site on the other side of the lake located at the 'Matrosen-Station'. Today you can find here only the foundation walls of the former reception building. The distance was 1.3 km or approx. 0.81 miles.