You could make a form (a mold) with cardboard and use a can of polyurethane insulation to fill it with your OCXO inside (protected by a plastic bag) like the "foam-in-place" principle. It will be exactly the size you want, pretty stiff, strongly bonded to the cardboard, so it will be easy to mount things on it if needed and with a minimum number of seams.
It may be more work than cutting sheets of styrofoam though. Didier KO4BB ------Original Message------ From: John Ackermann N8UR Sender: [email protected] To: Time-Nuts ReplyTo: Time-Nuts Subject: [time-nuts] Thermal insulation choice? Sent: Jan 6, 2012 1:39 PM 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 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. Sent from my BlackBerry Wireless thingy while I do other things... _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
