Anyone running with a power supply with built in UPS ? A long time ago (>15yrs) I did project that for a supply did a/c line -> battery -> +5/+12/-12. A side advantage was great isolation.
Can't remember the supply vendor tho' ... -pete > Joe and others > I would recommend using a linear PSU, I have some made by a Company called > Lascar (perhaps a different name in the States). These are not much larger > than the Thunderbolt itself with a little more height. They have three > separate VS./Rags, 5 volts and +15/-15 volt supplies of sufficient > capacity - all with trim-pots. Mine has been working for at least one year > non-stop - and you can be confident that it will not blown up, unlike some > switched supplies. > Roy > > > ----- Original Message ----- > From: "J. L. Trantham" <jlt...@worldnet.att.net> > To: "'Discussion of precise time and frequency measurement'" > <time-nuts@febo.com> > Sent: Monday, June 01, 2009 3:40 PM > Subject: Re: [time-nuts] Thunderbolt - any negatives ? > > >> Pete, >> >> I have purchased units via the 'group buy' and directly from Bob Mokia >> (fluke.l). One of the 'group buy' units, powered by the accompanying >> 'group >> buy' power supply, died after being left on for a couple of days (as I >> recall). I still have it disassembled in a box in line on my 'to do >> list' >> of things to fix. >> >> I was suspicious that the power supply might have been the culprit, >> perhaps >> facilitated by frequent power outages (i.e. transients), even though the >> power supply still works. Since then, I have only powered the units >> with >> linear power supplies with no problems. >> >> Joe >> >> -----Original Message----- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Pete Lancashire >> Sent: Sunday, May 31, 2009 10:33 PM >> To: time-nuts@febo.com >> Subject: [time-nuts] Thunderbolt - any negatives ? >> >> Thanks to those that have replied. It looks like just about everyone >> recommended the Thunderbolt. But before I invest .. any negative >> comments ? Specs, reliability, or ? >> >> -pete >> >> _______________________________________________ >> 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. > _______________________________________________ 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.
