On 29/07/14 16:53, Jethro_uk wrote:
On Tue, 29 Jul 2014 16:45:56 +0100, Harry Bloomfield wrote:

Jethro_uk brought next idea :
There was an apocalyptic cover to "Electronics Today International" (I
used to subscribe !) in the 80s, with a mushroom cloud, and a special
article detailing the damage the EMP from a nuclear blast could do ...
transistorised equipment - particularly MOSFET - was very vulnerable.
While valve equipment was effectively immune.

I remember the article well. The Russkies continued to use and develop
valves long after we abandoned them, likely for their tolerance of EMP.

I had a (female) friend who joined the RAF in the 80s. She had to learn
valve engineering to work on the radar systems ..

klystrons and magnetrons are 'valves' of a sort..



--
Everything you read in newspapers is absolutely true, except for the
rare story of which you happen to have first-hand knowledge. €“ Erwin Knoll