This may be a newbie question, but I'm a newbie, so: Do the HP telecom GPSDOs (Z38xx) require external airflow for cooling? They don't have built-in fans, but they sorta look like they depend on a rack-level cooling fan, which a telecom rack would almost certainly have.
I ask because I bought a Z3816 awhile back which worked for about a week and then failed. I traced the failure to an internal power supply brick, which had a big finned heat-sink attached but nevertheless smelled overheated and was shorted internally. I never found a replacement power brick, and I don't have time to mess with it right now, so I recently bought a Z3805A. It, too, looks like it's working, but it started to feel awfully warm after a few hours, so I unplugged it for now. It probably wouldn't take much of a fan to bring the internal temperature down close to ambient, and the fan could be powered easily enough from the supply rails. But that might create a temperature gradient where the designers didn't intend one. Or it might cause problems I don't even know about yet. At the moment, the Z3805A is in a fan-less 19-inch rack with a bunch of other equipment, in a lab environment. Should it have its own fan? Cheers! --Stu _______________________________________________ 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.
