Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Radio Kootwijk is a small town in the Dutch municipality of Apeldoorn, with (in 2006) ca. 120 inhabitants. It is situated in a heather- and forest-rich territory in the Veluwe region, east of the sandhills of the Kootwijkerzand and the town of Kootwijk. The housing accommodations of Radio Kootwijk arose as a result of the building of a shortwave transmitter site with the same name, starting in 1918. The transmitters played an important role in the 20th century as a communication facility between the Netherlands and its then colony of Dutch East Indies. In 1923 Dutch PTT started trans-oceanic telegraphy using a longwave transmitter (a 400KW high frequency alternator) from the German Telefunken company under the callsign PCG, in the 24 kHz and 48 kHz.