[time-nuts] Making a 10811 better

Dick Moore richiem at hughes.net
Tue Sep 20 18:39:40 UTC 2011


Is there a relatively inert gas that has much higher thermal conductivity than air? Then a flask makes sense and is not the size of the basement...

Dick Moore


On Sep 20, 2011, at 5:00 AM, time-nuts-request at febo.com wrote:

> ------------------------------
> 
> Message: 2
> Date: Mon, 19 Sep 2011 18:21:30 -0700
> From: ed breya <eb at telight.com>
> To: time-nuts at febo.com
> Subject: [time-nuts]  Making a HP 10811 better
> Message-ID: <201109200121.p8K1LgsE015776 at mail30c40.carrierzone.com>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
> 
> 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
> 
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Mon, 19 Sep 2011 23:20:28 -0600 (MDT)
> From: "Don Latham" <djl at montana.com>
> To: "Discussion of precise time and frequency measurement"
> 	<time-nuts at febo.com>
> Subject: Re: [time-nuts] Making a HP 10811 better
> Message-ID:
> 	<d850d565aabe9422dd4172b9c904d5d4.squirrel at webmail.montana.com>
> Content-Type: text/plain;charset=iso-8859-1
> 
> 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 ...
> Don
> 
> 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
> www.lightningforensics.com
> www.sixmilesystems.com
> 
> 
> 
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> End of time-nuts Digest, Vol 86, Issue 55
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