Telefunken-Zeitung
Nr 40/41
VII Jahrgang Oktober 1925
Die Grossstation Malabar-Radio
Auf Java
von W. Doetsch
Probably the most comprehensive paper of those days on Radio Malabar
(German language, pdf, 2.8 MB)
The 
Telefunken “Maschienensender” (400 kW antenna power)(HF machine-generator) at 
Malabar was by far more reliable than Dr. de Groot’s famous Poulsen 
arc- type transmitter (which could, however, supply up to 2400 kW into the antenna). There existed a 
controversy between Dr. de Groot and the Dutch authorities in The Hague, who had 
purchased two Telefunken “Maschinensender” in late 1918, of which one was 
erected in Kootwijk Radio and the second one was, finally, installed at Radio 
Malabar (near Bandung on West-Java). 
Beit, against Dr. de Groot’s will. For quite a long time he neglected its 
existence. When Dr. de Groot’s own Poulsen type transmitter failed during the 
opening ceremony on 5 May 1923, he even did not consider to communicate with Holland 
by means of the Telefunken transmitter, to transfer a message to Dutch Queen 
Wilhelmina, who desperately waited for a radio message from Dutch Indies (now Indonesia).
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