I completely forgot about those two. I have a good local hobby shop with large pieces of balsa wood but I suspect it would be more expensive than good quality expanded polystyrene bead sheet. I will have to check out foam board next time. Both would be more difficult to cut without a hot wire knife.
On Fri, 6 Jan 2012 15:21:48 -0500, "jmfranke" <jmfra...@cox.net> wrote: >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" <j...@febo.com> >Sent: Friday, January 06, 2012 2:39 PM >To: "Discussion of precise time and frequency measurement" ><time-nuts@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 >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.