[time-nuts] Racal SA510 1MHz frequency standard

[tom burkart]

Hi all,
just wondering whether there is any information available on the  
following OCXO:

1 Mc/s frequency standard
Type No SA510
Racal Electronics Ltd
Bracknell Berkshire
Made in England

All the information I have is on the second label:

Pin   connection
1       common -ve
2       varactor supply
3       H.T. +ve
4       O.P. shield
5       O.P.
6       18V reg
7       varactor -ve
8       varactor +ve

I am surmising that the heater is around 24V, but rather than  
guessing, I am asking here as google has come up empty (probably wrong  
search term?)

Kind regards,

Tom Burkart