small valves

[Allison]

>
>Subject: Re: small valves
>   From: Stan Barr <stanb at dial.pipex.com>
>   Date: Fri, 22 Apr 2005 18:48:03 +0100
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>Hi,
>
>Arno Kletzander said:
>
>> And don't forget the first generation of R/C receivers intended for use in
>> model airplanes. They needed something small, lightweight, battery-powered
>> and inexpensive, so voila - miniaturized valves. I can't claim to have seen
>> one "in the flesh" yet, but I have a hobbyist book on what they used to call
>> "micro-electronics" in the mid-50s (ooh, printed circuit boards instead of
>> solder lug strips!) which shows a device about the size of a packet of
>> cigarettes with several such valves directly soldered onto a board with the
>> wires coming out of them.
>> 
>> Anybody here been R/C-ing back then?
>> 
>
>I saw them, but by the time I could afford r/c myself it was solid state.
>I remember guys using valves and miniature hi-sensitivity relays to run
>things like "Galloping Ghost" - a pwm proportional setup.
>There were tuned reeds as well for multi-channel.
>
I still have a complete GG setup, for 27mc using a 3a5 for the TX
and 1s4 for the regen rx.  Still works when I power it.  The only 
reason I'd not fly it is finding batteries.  As to wweight it was 
remarkably light considering.



Allison