Refine search results

All    Any    Exact phrase

Search hint

All - search for events containing all entered keywords

Any - search for events containing any, some, or all of the entered keywords

Exact phrase - search for events where keywords appear exactly as entered





Within of post code (UK Only)

Login for more refinement options

Hidden Broadcasts (clandestine radios in wartime POW camps)


Image of three blue heads in profile on grey background

An IET “Friday Lunchtime” Lecture. Speaker: Ralph Barrett, FIET

Date and Time

22 February 2013 - 14:00-15:30


London, United Kingdom - icon_popup  (See map)


Organised by the London local network.

About this event

When Allied Prisoners of War returned home after the end of World War Two, some managed to bring back clandestine radios used in the prison camps.These radios had had to be constructed in the utmost secrecy and with considerable ingenuity, for example using capacitors made from scrap and resistors from tree bark! The lecture will describe the construction and operation of some of these radios.

About the speaker

Ralph Barrett was formerly on the staff of the BBC, working in many departments, ultimately engineering the cross Channel link for international television. More recently he has presented lectures on various technical subjects. He is an IET Fellow.


12:00 - Meet in the Kelvin Lounge to pay for lunch
12:30 - Lunch
14:00 - Lecture and discussion

Registration information

The Friday Lunch Club meet at 12.30 for lunch prior to the lecture. If you would like to join them please contact Brian Lovell by email on or telephone: 020 8995 0661 by the previous Tuesday evening for the lunch and lecture, and by the Thursday evening for the lecture only.


Lecture - no charge
Lunch - £13.65 (payable at the event)

Are you looking for more events?

You might also be interested in (search more events)

Icon image of speech bubbles

Conference - Mon 23 October 2017 to Thu 26 October 2017

The world’s premier international conference on radar systems. Experience technical sessions on radar systems, bistatic, low frequency and passive radar, target clutter and detection, airborne surveillance, SAR and ISAR, MIMO processing and systems, NCTR, waveform diversity and much more.