Manufacturers

Behind every clandestine broadcast was a radio set.

These are the British makers and developers of the sets agents and resistance groups used.

Developer Or MakerRadio SetYearNotes
SOE Station IX, The FrytheType 3 Mk II (B2)194220 watt suitcase transceiver
SIS Section VIII, Whaddon HallWhaddon Mk V (La Paracette)1941Early lightweight clandestine set
Whaddon Hall workshopsWhaddon Mk VII (Paraset)1942Lightweight CW-only transceiver
SIS Section VIII, Whaddon HallWhaddon Mk XV1943Higher power version of the Paraset
BBCRadio Londres broadcasts1940 to 1944The voice the sets were built to hear

The B2

The Type 3 Mk II was designed in 1942 by Captain John Brown at SOE Station IX.

It is arguably the best-known spy radio of the war.

Agents carried it in a suitcase, which made it large but practical.

Learn More

Signal Discipline

Radio Londres

Sources

Type 3 Mk II (B2), Crypto Museum
British spy radio sets, Crypto Museum
Whaddon Mk VII Paraset, Crypto Museum

Two Halves Of One Code

John has a long mustache.

The chair is against the wall.

Hear the other half at The Chair Is Against The Wall.com