1940

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Germany - Dresden (0,25 kW) switches from 1285 kHz to 1465 kHz
Germany/Lithuania - Memel/Klaipeda switches from 564 kHz to 1285 kHz
Austria - Klagenfurt (5 kW) switches from 1294 kHz briefly to 886 kHz, then to 1285 kHz
Austria - Salzburg (1~2 kW) switches from 1348 kHz to 519 kHz

January

04: France - Commercial Radio Normandy (Fécamp - 1095 kHz, 274 m, 20 kW) ceases broadcasting due to financial problems. The transmitter is now used for unofficial foreign broadcasts of the Austrian freedom station.
07: UK - The BBC starts army broadcasts on 877 kHz for the troops in France. For the very first time since its start in 1922, the BBC will broadcast dance music on Sunday.
17: Germany - Station Hamburg II starts broadcasting with 100 kW as a backup for Hamburg I.

February

12: UK - The BBC starts broadcasting in Swedish
18: France - A programme for British troops starts via the former Radio Normandy transmitter in Fécamp
25: UK - The illegal station New British Broadcasting starts transmissions.

March

15: Germany - Station Mühlacker II starts transmitting with 100 kW.
17: UK - The BBC Army transmitter switches from 877 to 804 kHz (373.1 m).
18: UK - The BBC starts broadcasting in Danish and Finnish.
19: Germany - Due to a storm station Mühlacker (Reichssender Stuttgart) is off air for three days. A mobile transmitter is used for replacement.

April

04: Norway - NRK no longer transmits 24h but stops evenings at 2300utc.
09: UK - The BBC starts broadcasting in Norwegian.
11: UK - The BBC starts broadcasting in Dutch.
13: Norway - Porsgunn's antenna is blown up,but it returns on the air on 13 Dec on 1222 kHz.
15: Norway - The 100 kW transmitter Vigra is destroyed in an air raid; the Notodden transmitter is blown up (returns on the air on 30 April with 0.5 kW on 1294 kHz).
??: Norway - Hamar's new 1 kW transmitter (built in December 1939) is removed, the old one (0.7 kW) becomes active again on 519 kHz

May

10: Germany - Stations in western, northwestern and southern Germany are silenced on military grounds. The population is not informed and believes this is due to air strikes.
14: Netherlands - The station in Kootwijk no longer transmits newscasts for technical reasons. Newscasts are now only broadcast on 415m.
16: France - Radio Strasbourg changes from 859 kHz (349.2 m - 100 kW) to 913 kHz (431.7 m).
16: France/Belgium - The Belgian national radio starts broadcasting via Radio Lille. One week after the German invasion in Belgium, all Belgian stations were silenced. The studio was dismantled and transported to France.The Belgian national radio starts broadcasting via Radio Lille. One week after the German invasion in Belgium, all Belgian stations were silenced. The studio was dismantled and transported to France.The Belgian national radio starts broadcasting via Radio Lille. One week after the German invasion in Belgium, all Belgian stations were silenced. The studio was dismantled and transported to France.The Belgian national radio starts broadcasting via Radio Lille. One week after the German invasion in Belgium, all Belgian stations were silenced. The studio was dismantled and transported to France.
17: Czechoslovakia - Ostrava (2 kW) switches from 1158 kHz to 1348 kHz, Brno (32 kW) switches from 922 kHz to 1158 kHz, Dobrochov (100 kW) starts broadcasting on 922 kHz
18: Belgium - The station in Brussels starts broadcasting and relays the RRG programme.
18: France/Belgium - The Belgian broadcaster now also broadcasts via Radio Paris II. They will cease there on 13 June 1940.
19: France/Netherlands - Radio Vrij Nederland (Radio Free Netherlands) starts broadcasting via Paris-Mondial (1145-1200) and via Paris PTT (2100-2120). Announcement: "Hier is Vrij Nederland, de officiële Nederlandse radio-omroep te Parijs".
21: Luxembourg - Radio Luxembourg starts relaying German programmes.
25: Germany - Hannover-Hemmingen (8 kW) replaces older 1.5 kW-transmitter on 1330 kHz
26: Luxembourg - Goebbels orders the Luxembourg station to function as Geheimsender for France
28: Norway - The Narvik transmitter ceases broadcasting.
30: Germany - The Geheimsender is expanded with Reichssender Köln, albeit on a new frequency.

June

02: Norway - The Vadsř transmitter is destroyed in an air raid, a 0.2 kW transmitter takes over.
03: Germany - The foreign broadcasts in French are now relayed via all German medium wave transmitters.
03: Germany/Belgium - Goebbels authorises the 'Voix de la Paix' to broadcast on medium wave near the normal Brussels frequency.
06: France - The radio stations Thourie and Alma in Rennes are seized by the German occupying force.
09: Germany - Start of the RRG Einheitsprogramm (Unity programm)
10: France/Netherlands - After 23 days Radio Vrij Nederlands ceases broadcasting via France as the German troops are just outside Paris.
12: Germany - The German Geheimsender 'Réveil de France' starts broadcasting on long wave (formerly also already on short wave)
15: France - The station in Paris starts relaying the German RRG programm
15: France - The French broadcaster starts broadcasting from the south on France on the same frequency as the Paris station
20: France - The French station in Bordeaux ceases transmitting at 0230 local time.
24: Germany - The communist Geheimsender 'Radio Humanité' ceases broadcasting
Geluidsfragment Listen to an extract of Radio Humanité from 1940   01:34, 16 kbps, 184 kB (MP3)
Geluidsfragment Listen to an extract of Germany Calling from 1940   00:18, 16 kbps, 36 kB (MP3)

25: Germany - Goebbels decides to cease all broadcasts to France via German stations.

July

04: Germany - The German stations start broadcasting ealier (as of 0300) so that the population can be informed of air strikes.
04: France - The station in Vichy resumes broadcasting
07: Germany - Station Worker's Challenge starts broadcasting on 1408 kHz/213 m (cover name ' Concordia Station') with propaganda towards the UK hoping to stir unrest among British workers.
28: UK/Netherlands - First broadcast of Radio Oranje via the BBC on 200 kHz (1500 m - 150 kW) and 804 kHz (373 m - 70 kW). The first transmission starts with a speech of queen Wilhelmina.

August

11: UK - The BBC introduces a new interval signal. The tones for B, B, C are now transmitted. Before (as of 1930) they used the ticking of a clock.
21: Germany - 'Worker's Challenge' reduces broadcasting time
21: Germany - By the order of Göring, all German stations on long and medium wave are to be silenced between 2300 and 0300 until 26 August 1940 (then prolonged until 5 September and then indefinitely) so that the British RAF cannot use them as direction beacons.

September

07: Norway - Vigra returns to air on 629 kHz with only 1kW.
08: Italy/Sweden/Switzerland: Following German orders, all stations in these countries sign off at 2300 so that British pilots cannot use them for navigation.
12: Denmark - Following German orders all stations are to sign off at 2100, which irritates the population as in neigbouring Sweden this is only 2300.
16: France/Germany - Strasbourg starts relaying Reichssender Stuttgart
28: Germany/Poland - Danzig/Gdansk III - Glettkau (0.8 kW) starts broadcasting on 1429 kHz
28: UK/Belgium - Radio België starts broadcasting via the BBC for 10 minutes per day.
28: Norway - The 1 kW-transmitter from Hamar starts broadcasting in Vadsř (in 1941 the power is raised to 10 kW again).

November

15: Luxembourg - Radio Luxembourg becomes a Reichssender
30: UK - The BBC starts broadcasting in Luxembourgian (Letzeburgesch)

December

01: UK - The BBC starts broadcasting in Icelandic



  1939

1941