Interesting thanks. My new to me Thunderbolt was apparently manufactured in Apr 2004 and appears to have the older higher resolution chip. I've noticed some of the pictures on various auction sites appear to show a label with a manufacturing date. I'll be curious to see when some of the sellers start asking for a premium with units with the older chips (: If I was to buy another one I wouldn't mind paying a modest premium for one with the older chip.
I've been favourably impressed with the performance of the Thunderbolt so far. ----- Original Message ---- From: Arthur Dent <golgarfrinc...@yahoo.com> To: time-nuts@febo.com Sent: Sat, September 25, 2010 3:37:39 PM Subject: [time-nuts] DS1620 Variants in the Thunderbolt Heathkid:"What is the higher resolution variant of the DS1620 and how can one tell the difference from the chip markings?” If you read the middle line on the DS1620 temperature chip you may see "0310D1" where the 5th character is a capital "D". The 03 is the year and the 10 may be the month of the year. The D1 is the revision code. The "C" version was before maybe 2000 so you won't see those unless they are used as replacements and the "E" ("bad") revision wasn't used until late 2004. -Arthur _______________________________________________ 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.