Jim, I had a TAPR Thunderbolt connected to the power supply that came with it and left it on for several days. My location is bothered by various power spikes and outages.
After one power outage that tripped the circuit breaker to the work shop, I discovered the Thunderbolt injured (no communication, no 1 PPS, but 10 MHz out was present) but the power supply was OK, at least as measured by a voltmeter. I have since powered up a second unit using a nice linear power supply and no problem leaving it on for weeks at a time. I have yet to dig in to the Thunderbolt to chase down the problem. Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Palfreyman Sent: Tuesday, February 17, 2009 4:13 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Thunderbolt power supply open heart surgery Hi folks, Well I woke up the other morning at 2am to find all the power off in the house. I was about to ring the power company and thought I'd better check my meter box. Turns out one of the RCDs had tripped. I reset it and all was fine. What puzzled me was what tripped it. It took out my workshop, speaking clock, various GPSDOs and an HP rubidium I've borrowed. However all was working upon reset. Today I downloaded Lady Heather and went to test it and noticed the should-be-running Thunderbolt was cold. I checked the voltages from the power supply and - nothing. Ignoring the life-or-death dire warnings on the power supply case I opened it. It had *that* smell. You know the smell of that special smoke that keeps all electronic components working because when it's released they stop. R1 is black and charred. Can anyone tell me what value R1 is and/or where I might get a new power supply (just in case it took other components with it)? Has anyone else had this problem? Regards, Jim _______________________________________________ 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. _______________________________________________ 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.
