[time-nuts] Restoring GR 1120-AB Frequency Standard

[Bruce Griffiths]

phil wrote:
> Russ
> Do you have a photo, would it be possible to build? I have a few flasks of
> mercury and a few 10's of thousands of mercury wetted relays that some could
> be cannibalized for electrodes. The trick here is how thin is that column of
> mercury. My guess the thinner the column, the finer the resolution or the
> more it will travel with a small temp swing. Better yet, possible to cut
> that thing open and fix it.
> I know that's more time than it's worth.
>
> Another thought, if the contacts have corroded in the mercury, perhaps from
> contamination, would it be possible to "burn" the contamination off.
> Thinking of excessive voltage/current. Perhaps making it arc internally.
> Trick would be to limit current not to explode the thing, perhaps using a
> charged capacitor. Just a thought.
>
> Oh, do you have the whole rack, all dividers and the clock? I bet the old
> clock alone is worth a thousand bucks today. Seems like it was driven by 1
> KC. My old standard was complete, a 5 or 6 foot rack and came out of an old
> Hamerland Radio plant.
>
> phil
>
>
>   
Phil

NBS used platinum wires in their mercury toluene thermoregulators.
These were constructed from pyrex as it proved more stable than 
stainless steel.
These themoregulators had a sensitivity of about 0.001C and were used to 
regulate the temperature of oil baths,

Bruce