The Germans used jamming stations to try to block the reception of Radio Orange and the BBC. A 'kraut sieve' was a home-made indoor antenna intended to reduce the effect of German jamming stations.
The radio also came under strict German supervision. An appealing selection of programmes was offered, with plenty of radio plays and music interlaced with a pro-German message.
For real news people secretly listened to the BBC and Radio Orange, the Dutch government station in London.
The militant speeches given by Queen Wilhelmina were particularly popular. Almost no one paid any attention to the ban on these stations.