[time-nuts] Thermal insulation choice?

jmfranke jmfranke at cox.net
Fri Jan 6 20:21:48 UTC 2012


Balsa wood is good and is readily available from Hobby Shops. Or Gator board 
(paper laminated on foam) also called foam board from Art's and Craft 
stores.

John  WA4WDL

--------------------------------------------------
From: "John Ackermann N8UR" <jra at febo.com>
Sent: Friday, January 06, 2012 2:39 PM
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Subject: [time-nuts] Thermal insulation choice?

> I am looking for a readily available (from Home Depot or other local 
> source) insulating material to use in a chassis that's housing a sensitive 
> OCXO.  My goal is just to slow down any external thermal transients so the 
> oven loop has time to react gracefully.
>
> I'm thinking of something in sheet form that I could glue to the inside 
> bottom and side of the metal chassis.  The trimmed sheet sizes will each 
> probably end up being around 4 x 8 inches.  I have enough clearance for a 
> thickness of a half inch or so.  I'd like to avoid a bat material as that 
> would be hard to mount neatly.
>
> Long lifetime (ie, not getting all crumbly after a few years) is important 
> as I don't expect this oscillator to get cold until I do.
>
> Any suggestions of a material to look for?
>
> Thanks,
>
> John
>
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