[time-nuts] Re: Racal Dana 9457 Rubidium with intermittent lock

[Dan Rae]

Mark, in one or two of the 9475s I have fixed, there was a problem with 
the LF oscillator in the servo section which free runs at about 8 kHz.  
There are some adjust on test Rs that had drifted in value.  Page A10 in 
my FRK manual.   U3 (4060 )should produce an output of 127 Hz from my 
notes.  If this is off in anyway it will upset the synth.   But I see 
there is a different version of this board where there is an Op Amp, 
also U3 doing the oscillating but at a lower frequency...

Whatever, it needs to be stable.

Dan