On Mon, 9 Jun 2014 11:55:18 +0100, "Robin" wrote:

I guess the guidance system would have been based around well tried
and tested modules - hence valves.

I don't know about valves but we were told it used germanium transitors.
(The RAF bod seemed not to have cottoned on that would not impress
teenagers whose trannies were in regular use for Radio Caroline.)

And todays Teenagers can see them on the Eurovision Song Contest.

G.Harman