[time-nuts] Making a HP 10811 better

Don Latham djl at montana.com
Tue Sep 20 05:20:28 UTC 2011

Ah well. Just a thought. I was thinking of simply dumping the whole
thing into a picnic jug full of baby oil :-)
Sorta scatterbrained, but I have seen mentioned on the list a basement
sized steel block ...

ed breya
> One last thing regarding oil-filling. My previous comment was made
> picturing oil inside the oscillator block only - not outside, or
> between the outer parts - if there is a resistance wire heater (I
> think it's heated with Qs only on the 10811) it is held together with
> various tapes and adhesives that could soften or dissolve. Also, the
> insulation would not insulate very well of saturated with oil, and
> could possibly soften or break down somehow. I would not recommend
> dunking the whole thing in a vat of oil.
> And one final, final note: If oil is somehow effectively contained in
> the oscillator block, then a void (bubble) of some sort, or an
> expansion facility or vent would be needed to relieve the pressure
> changes during warmup.  Otherwise, when started up, the expanding oil
> would have to either leak out, or deform (or damage) something. This
> would be equivalent to dramatically increasing barometric pressure,
> and certainly effect the oscillator frequency.
> Ed
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"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell

Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304

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