[time-nuts] Making a 10811 better

[Bob Camp]

Hi

Remember that if you are going to do any of this - you will need a good temperature test system to figure out weather you are making things better or worse. There is a lot of varibility between 10811's….

Bob


On Sep 20, 2011, at 2:39 PM, Dick Moore wrote:

> 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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