[time-nuts] Tube/valve mounted xtals....

[EB4APL]

Here you have one of these crystals, it is a 62.500 Kc/s unit used in a 
Marconi TV studio sync generator in the sixties.
http://s1338.beta.photobucket.com/user/EB4APL/media
/CAM00431R_zps07fdcbf4.jpg.html

Ignacio, EB4APL


El 07/03/2013 15:45, Lee Reynolds escribió:
> ....as young Nigel said, Marconi (for one) made use of these things. I
> recall a Marconi HR-22 that had a number of these installed for spot
> frequency channel reception.
>
> Lee
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