Preist joined the RDF team at the Bawdsey Research Station in September
1936 where he spent the three years before the war contributing many
pioneering developments. These included adjusting the design of the yagi
aerial to make it effective, and building a transmitter, receiver and aerial
system at 1.25 metres that later became the prototype for Chain Home Low.
In February 1942, after the move to Worth Matravers, he played a part in
the Bruneval Raid - a commando raid code named 'Operating Biting' to capture
German radar equipment. He was on a launch with the naval party to help
identify what equipment to bring back. In the event, hostile fire meant
that he did not land.
Equipment was captured, and analysis in
the laboratory at RAE made it possible to develop countermeasures to jam the
German radars. This was important both for the bombing campaign and the
Don Preist gives fascinating accounts of his part in the pioneering work
and of the Bruneval Raid in the Penley Radar Archives - see link below.
Penley Jan 2011