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" <[email protected]>
Sent: Friday, January 06, 2012 2:39 PM
To: "Discussion of precise time and frequency measurement"
<[email protected]>
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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