Hi Folks,

Many years ago as a boy, I occasionally borrowed from the library a 
facinating old book on Radio Control.

It was a British book and contained lots of wonderful home-brew valve 
transmitters and receivers as well as rubber powered actuators, bang-bang 
servos and tuned reed relays (I think).

But in particular it had a wonderful proportional system which used a 
spinning cylinder with tapered brass segments (in the TX).

I would love to find a copy after all these years. That book got me started 
in RC and electronics.

Can anyone remember that book?

Thanks in Advance ........... Zim

gzimmer_ at_ wideband_dot_net 



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