Thanks I was aware of Ni Fe batteries but have never seen them for sale at the local "battery store" where I buy batteries for my vehicles, time nuts and amateur radio pursuits (:
I view lead acid batteries (especially ones designed for in door use) as semi expendable for my various hobbies. I figure I got my monies worth from the ones backing up the HP105B and FTS 1050 as I am well on my way to 10 years of up time for those two devices. I tend to replace batteries on general principles every 5 years or so or at least move them to a less demanding application. (Ie. shuffle them from time nuts backup use to portable power use for amateur radio.) Sent from my iPhone > On Sep 15, 2016, at 3:13 PM, Alexander Pummer <alex...@ieee.org> wrote: > > if you deep discharge led acid batteries -- which are not made special for > deep discharge -- you will have to replace them quite often, on the other > hand Ni-Fe batteries you could short out, overcharge they are undisrtuktable > that is the reason why they are not produced any more in the US, they do not > fit into the American business-model, but phone companies, railway and > aviation still using them, you could still find old electrical forklifts with > Ni-Fe battery made by Edison Batteries in the sixties in the past century the > batteries are still fine. Tudor -- a led-acid battery producer -- purchased > Edison Batteries and closed down the formidable competitor > > 73 > KL6UHN > Alex > >> On 9/15/2016 2:26 PM, Mark Spencer wrote: >> Hi I've run my HP105B (with the old style oscillator) from AC power via a >> consumer grade UPS, 24 Vdc from a lead acid battery bank and briefly from >> the internal battery pack with out any notable changes in performance (that >> being said I can't measure phase noise so this observation may or may not be >> of use.) >> >> I'm not to fussed over the internal Nicad pack and rely on an external >> battery bank in case I loose AC power for an extended time period. >> >> During a two day outage my HP105B and FTS1050 ran nicely from a 100 AH >> battery bank but the batteries needed to be replaced shortly afterwards. >> >> Sent from my iPhone >> >>> On Sep 15, 2016, at 11:13 AM, Jeremy Nichols <jn6...@gmail.com> wrote: >>> >>> Your point is well made. My question is: what happens to the quality of the >>> output sine wave if I use anything other than a true sine-wave (i.e., >>> expensive) UPS? Most of them these days produce a semi-sine wave (aka >>> modified square wave) that may or may not play well with the 105B. Anyone >>> have experience? >>> >>> A external battery and appropriate chargers and cabling does sound like >>> another good alternative. Harder to move around but I don't (yet) have such >>> a need, only that the 105B stay "on" regardless of power failures. >>> >>> Jeremy >>> >>> >>>> On 9/15/2016 10:15 AM, Bob Camp wrote: >>>> Hi >>>> >>>> A bigger question becomes: >>>> >>>> Do batteries inside equipment make much sense anymore? >>>> >>>> These days, a UPS is often a standard part of a rack in an outage prone >>>> area. Powering >>>> the “whatever” instrument off of the same UPS as the rest of the stuff is >>>> one obvious >>>> answer. >>>> >>>> The other answer is an even older approach. Use a battery bank that is >>>> external to all >>>> the gear in the rack and tend it independently of each box in the rack. >>>> That way you have >>>> a few very large cells to worry about rather than a whole bunch scattered >>>> about. Things like >>>> lead acid that are impractical in a piece of gear are more of an option in >>>> an independent >>>> battery box. A single charger / line supply makes it easier to invest in >>>> something with real >>>> smarts in it. The advent of dirt cheap isolated switchers makes the >>>> conversion to instrument >>>> voltages a lot easier than it once was. Pick a common voltage like 12, 24, >>>> or 48V and run with it. >>>> >>>> My answer to the frequency standard battery pack question has become >>>> “don’t do it”. It makes >>>> them a *lot* lighter weight !!! >>>> >>>> Bob >>> _______________________________________________ >>> 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. >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2016.0.7797 / Virus Database: 4656/13022 - Release Date: 09/15/16 > > _______________________________________________ > 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.
