Before Radar WW1 style

[McMurdo]

They're got a pair of those 'demo' educational sound mirrors or parabolic reflectors at Jodrell Bank. Great fun, though in this case used to illustrate how the radio telescope works.

[russell_w_b]

Originally Posted by McMurdo

Instruments of Darkness ISBN 978-1473895645

Most Secret War ISBN 978-0141042824

PS An edition of BBC2's 'Coast' did experiments with the mirrors, microphones and some sort of audio spectrum analyser.

Also comprehensively covered in the first chapter of Colin Dobinson's 'Building Radar' (ISBN 978-0-413-77229-9): a book which has been discussed on this forum before.

[Richard_FM]

Originally Posted by McMurdo

They're got a pair of those 'demo' educational sound mirrors or parabolic reflectors at Jodrell Bank. Great fun, though in this case used to illustrate how the radio telescope works.

I remember being there once when a party of scouts decided to give it a try, which went well until one of them thought it was good to shout some four letter words into it, & they were quickly herded away!