Jose,
Thank you - the Temex note explains all! Obviously ICOM tried a DTCXO in
the 706 Mk II, found it unsatisfactory, and reverted to a straight TCXO in
the IIG.
Alan,
Try http://www.npl.co.uk/npl/ctm
Lots more time stuff there.
Incidentally, Alberto is right, the H2 masers with stability only 10E13
must be 30 years old!
NPL are playing with caesium fountain technology which promises 10E16
Walter G3JKV.
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