Thank you very much, John and Paul! Our Sunday evening dinner consisted of trying to figure out what our apprentice did wrong. Our dinner guest was a new friend who works at the local Radio Shack....... Probably it needs the internal battery and capacitor, because he did follow the previous instructions correctly. Your posts made it clearer. Thanks! Diane Hofstetter >From: "Paul McCloud" <pmc033@earthlink.net> >Reply-To: Pianotech <pianotech@ptg.org> >To: "'Pianotech'" <pianotech@ptg.org> >Subject: RE: SAT batteries 9 volt? >Date: Mon, 19 Jan 2004 08:40:14 -0800 > >Diane: > I have replaced my SAT I batteries with a 6 volt battery pack >(NiCads) which is an exact replacement for the battery pack that >Inventronics installed many years ago. Originally, there was a sealed >lead-acid battery, and the nicads were installed by them when the >original battery went bad. I don't know if they changed the charging >circuit at that time, but I suspect that it was. > Lately, I removed the internal battery pack and now use an >external battery pack which I velcro'd to the back of the unit. I >change the individual batteries and charge them in a separate charger. >This way, if one battery goes bad, I don't have to replace the whole >battery pack. Maybe this is overkill, but I got tired of replacing the >battery pack. > Nicad batteries need to be deep cycled. They should be >discharged as far as possible, and this way they will be conditioned to >hold a long charge. When we recharge the internal batteries of the SAT, >they may not be discharged much, so they get used to having a short use >before recharging. Then if we try to use the SAT over a longer time, >the batteries discharge more quickly. I think you know what I mean. >The low battery indication circuit on the SAT doesn't necessarily give >the deepest cycle. It only tells us that the battery voltage is >insufficient to power the unit. When I remove the batteries to recharge >them in my charger, they will still run my AA flashlight for a good >while. This is after the low battery indicator has shown the need to >charge them, and after the unit has shut down. > The circuits in the SAT can run on 9 volts, or the 6 volts that >the regular batteries supply. I've seen 9 volt batteries installed on >the back of a SAT so that when your batteries are dead, you just put the >9 volt in there, and it will get you through the day until you can >charge them again. Many electronic devices will run on a range of >voltages. Using 9 volts will work, but it takes more room, and more >batteries, to get there. And there's not a whole lot of room inside the >SAT. > I hope this helps. > Paul McCloud > >-----Original Message----- >From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On >Behalf Of DIANE HOFSTETTER >Sent: Sunday, January 18, 2004 9:45 PM >To: pianotech@ptg.org >Subject: SAT batteries 9 volt? > >Our apprentice, using my Dad's old SAT 1, tried to replace the >batteries. >We searched the pianotech archives and he followed the instructions >found, >but still he gets "LoBat" message after charging it for four days. > >Now our question is, when he used 4 AA batteries, that only gave him at >the >most 4.5 volts, but the charger we used with the SAT was a 9 volt >charger. > >Are there some kind of industrial quality batteries that give 2.5volts >in an >AA size? > >Thanks for the help! > > > >Diane Hofstetter > >_________________________________________________________________ >Find high-speed 'net deals - comparison-shop your local providers here. >https://broadband.msn.com > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives _________________________________________________________________ Check out the new MSN 9 Dial-up — fast & reliable Internet access with prime features! http://join.msn.com/?pgmarket=en-us&page=dialup/home&ST=1
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