Kaypro 2000 charging
Hi, I just found a Kaypro 2000 at the local recycler. No power supply. From what I can find online it has three(3) lead acid batteries. Any thoughts on getting it to fire up? I do not know the polarity of the power jack on the back. Once I get that, I was thinking of a 6 volt supply, more to just turn it on, rather than try to charge the batteries. Thanks. Joe Heck
Re: Kaypro 2000 charging
I'm curious about the lead acid battery. Most rechargeable things used NiCads. Do you have a picture of what is inside? Dwight From: cctalk on behalf of joe heck via cctalk Sent: Wednesday, May 16, 2018 3:27:36 AM To: gene...@ezwind.net; Discussion@ Subject: Kaypro 2000 charging Hi, I just found a Kaypro 2000 at the local recycler. No power supply. From what I can find online it has three(3) lead acid batteries. Any thoughts on getting it to fire up? I do not know the polarity of the power jack on the back. Once I get that, I was thinking of a 6 volt supply, more to just turn it on, rather than try to charge the batteries. Thanks. Joe Heck
Re: Kaypro 2000 charging
Hi Dwight, The Selectric Typewriter Museum has a blurb on the 2000 and calls out a 3 cell lead acid battery pack. A Youtube video that dismantles a 2000 that the magic smoke came out of also calls out a lead acid battery. The age is around 1985, so I'm not sure NiCd were readily available then. Just too long ago for me to remember. If you check Youtube, and look for RIP Kaypro, you will see a machine being taken apart. Joe On 5/16/2018 9:40 PM, dwight wrote: I'm curious about the lead acid battery. Most rechargeable things used NiCads. Do you have a picture of what is inside? Dwight *From:* cctalk on behalf of joe heck via cctalk *Sent:* Wednesday, May 16, 2018 3:27:36 AM *To:* gene...@ezwind.net; Discussion@ *Subject:* Kaypro 2000 charging Hi, I just found a Kaypro 2000 at the local recycler. No power supply. From what I can find online it has three(3) lead acid batteries. Any thoughts on getting it to fire up? I do not know the polarity of the power jack on the back. Once I get that, I was thinking of a 6 volt supply, more to just turn it on, rather than try to charge the batteries. Thanks. Joe Heck
Re: Kaypro 2000 charging
On Wed, 16 May 2018, joe heck via cctalk wrote: The Selectric Typewriter Museum has a blurb on the 2000 and calls out a 3 cell lead acid battery pack. A Youtube video that dismantles a 2000 that the magic smoke came out of also calls out a lead acid battery. The age is around 1985, so I'm not sure NiCd were readily available then. Just too long ago for me to remember. If you check Youtube, and look for RIP Kaypro, you will see a machine being taken apart. NiCd batteries were readily available in 1985. They were invented around 1900, and were available in USA since about 1946? HOWEVER, admittedly, their capacity was somewhat inadequate. Also, their voltage was around 1.25V, when zinc-Carbon and Alkaline batteries were 1.5V. Therefore, they were a somewhat unacceptable replacement for disposable batteries. Nevertheless, for situations that required rechargeables, where lead-acid was too heavy, they were available, and widely used. Over half a century ago, I used electronic flash guns that used NiCd's. A 1985 NiCd battery pack would not have had a long life even in a Kaypro 2000, and would end up being used mostly for moving it from one mains outlet to another. I remember an interview with Lee Felsenstein, in which he was asked how much a battery power unit for the upcoming Osborne would weigh. He reponded that the external DC connection was currently for use with a car. (Lee was driving a Honda Accord). Perhaps you are thinking of NiMH, which seem to have been around less than 30 years. THOSE were/are way better than NiCd in capacity. Much more recently, of course, the trend has been to Lithium batteries. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Kaypro 2000 charging
I've used NiCads in RC radios, a long as they had transistor RC radios. I just thought it was a little unusual to see lead acid cells for a portable. I guess they were more concerned about run time than weight.
Re: Kaypro 2000 charging
The manual and the other documentation I've found online boasts a 4 hour useful runtime (with light to moderate floppy use) with a 24 hour charge. And yes, the unit is heavy, at about 13 pounds. Joe On 5/17/2018 1:17 AM, dwight via cctalk wrote: I've used NiCads in RC radios, a long as they had transistor RC radios. I just thought it was a little unusual to see lead acid cells for a portable. I guess they were more concerned about run time than weight.
Re: Kaypro 2000 charging
Message: 20 Date: Wed, 16 May 2018 20:40:04 -0700 (PDT) From: Fred Cisin >I remember an interview with Lee Felsenstein, in which he was asked how >much a battery power unit for the upcoming Osborne would weigh. He >reponded that the external DC connection was currently for use with a car. >(Lee was driving a Honda Accord). Sorry for the late reply, but I was travelling and needed to dig out the unit. The lead-acid battery for the Osborne Powr-Pak(tm) I own weighs 3.59 kg. Bob
Re: Kaypro 2000 charging
catching up late to this thread...what is the power supply rating for a 2000, and if it's dead will removing the battery allow a person to fire it up or do you have to have a working battery to apply power? I forgot I have one of these buried in my laptop shelf. b On Mon, May 21, 2018 at 1:30 PM, Robert Feldman via cctalk < cctalk@classiccmp.org> wrote: > Message: 20 > Date: Wed, 16 May 2018 20:40:04 -0700 (PDT) > From: Fred Cisin > > >I remember an interview with Lee Felsenstein, in which he was asked how > >much a battery power unit for the upcoming Osborne would weigh. He > >reponded that the external DC connection was currently for use with a car. > >(Lee was driving a Honda Accord). > > Sorry for the late reply, but I was travelling and needed to dig out the > unit. > > The lead-acid battery for the Osborne Powr-Pak(tm) I own weighs 3.59 kg. > > Bob > > >
