[volt-nuts] Oven thermal insulation

[Dallas Smith]

Randy, hi again,

My idea sounds crude but it worked very well. The outer box was made out 
of small squares of aluminum drilled and taped with small aluminum angle 
pieces. I have two references in this oven, a fluke circuit based on the 
731b, and one of Doug’s 10 volt references. I run the oven at 45°C. The 
gray board for the inner cover is ‘GATOR Board’ used to mount prints, it 
has a foam core. You should also have a guarded transformer, got mine 
from scrape fluke 510,

Dallas






On 7/6/2015 10:09 PM, Dallas Smith wrote:
> Hi Randy,
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> I used a box in a box then shot yellow window or gap fill insulation from your hardware store, use minimal expanding type. Fill around the spaces between the boxes with the tube but very slowly. You will get this on your hands so use your gloves because you will have to hold the boxes in place as it expands. After it dries cut the top off with a bread knife. May take a couple of tries to get what you want.
>   
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> Dallas
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>   
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>   
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>> Date: Mon, 6 Jul 2015 17:43:45 -0700
>> From: randyevans2688 at gmail.com
>> To: volt-nuts at febo.com
>> Subject: [volt-nuts] Oven thermal insulation
>>
>> I am working on a voltage reference deisgn that will go into an oven for
>> the highest stability. I am looking for a good insulation material that
>> can stand high temperatures safely (up to 80C). Looking at some HP
>> frequency standard ovens I see a hard, light-weight insulation material of
>> some type that looks like it would work really well, but I have no idea
>> what it is. Does anyone have any suggestions?
>>
>> Thanks,
>>
>> Randy Evans AE6YG
>>