HP Forum Archive 16

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Spice Chargers Message #1 Posted by John Bobinyec on 18 Apr 2006, 1:57 p.m. I have a 33C in need of a charger. Somewhere on this site it mentions that the charger should be an 82087B. In a forum archive, I see mentioned that the 82087D is also a Spice charger. Is it okay to use this latter model charger with my 33C?

Re: Spice Chargers Message #2 Posted by Vieira, L. C. (Brazil) on 18 Apr 2006, 2:36 p.m., in response to message #1 by John Bobinyec Hi, John; as you can check here, Spice is the 'name' of the HP3xE/3xC series. So, the HP33E/C is one of the Spice´s. Cheers. Luiz (Brazil)

Re: Spice Chargers Message #3 Posted by John Bobinyec on 18 Apr 2006, 2:52 p.m., in response to message #2 by Vieira, L. C. (Brazil) Let me rephrase my question. On the "Battery Packs & Chargers" part of this website, the following is presented: "Spice (HP-31E, 32E, 33E, 33C, 34C, 37E, 38E, 38C) Battery HP 82109A, Chargers HP 82087A/B (HP 82089B, 82090A/B 220-240 VAC only) Do not use A models on continuous memory calculators." Notice how the 82087D is not mentioned. Should it be? Thanks, John Bobinyec

Re: Spice Chargers Message #4 Posted by Etienne Victoria on 18 Apr 2006, 2:56 p.m., in response to message #3 by John Bobinyec Hi John, Luiz, You can use your "D" on your Hp-33C. The only model that cannot be used with constant memory calculators is the "A" model. Etienne Edited: 18 Apr 2006, 3:08 p.m.

Re: Spice Chargers Message #5 Posted by Etienne Victoria on 18 Apr 2006, 3:06 p.m., in response to message #3 by John Bobinyec And to be complete, If you check your Hp-33C in the Hp part database HERE. ...you'll see that the 82087D is explicitly mentioned as adequate for your model. Etienne

Re: Spice Chargers Message #6 Posted by John Bobinyec on 18 Apr 2006, 3:15 p.m., in response to message #5 by Etienne Victoria Thank you, all. John Bobinyec

Re: Spice Chargers Message #7 Posted by Ronald on 18 Apr 2006, 4:47 p.m., in response to message #6 by John Bobinyec Hi all, Maybe a dummy question, but what is the difference in the A and D version in specification, different output voltage, max. current? Ronald

Re: Spice Chargers Message #8 Posted by Etienne Victoria on 18 Apr 2006, 5:11 p.m., in response to message #7 by Ronald Hi Ronald, Electrically, they're both : Input 110VAC, Output 1.8 VA max, 10 V AC, 7Ohm I think that the "D" model cord is longer but I'm not dead sure. And for Europe Hp-82090A/B Output 0,9VA, 9VAC, 7Ohm Etienne Edited: 18 Apr 2006, 5:21 p.m.

Re: Spice Chargers Message #9 Posted by Walter B on 18 Apr 2006, 6:11 p.m., in response to message #8 by Etienne Victoria Hmmmh, the cord length determines whether it can or cannot be used for CMOS Spices??? Maybe I missed an important fact in physics, electricity or semiconductors - please explain d;-) Edited: 18 Apr 2006, 6:12 p.m.

Re: Spice Chargers Message #10 Posted by Etienne Victoria on 18 Apr 2006, 6:43 p.m., in response to message #9 by Walter B No, I was just stressing a possible physical difference between A/B & D not an electrical one :-) Cheers. Etienne Edited: 18 Apr 2006, 6:44 p.m.

Re: Spice Chargers Message #11 Posted by Tony Duell on 19 Apr 2006, 6:38 a.m., in response to message #10 by Etienne Victoria I believe that the Spice/Woodstock chargers for machines with Continuous Memory have a couple of zener diodes wired in inverse series across the output. The older model doesn't. Incidentally, the connector for the 'topcat' series charger has 2 zeners in inverse series hidden in the plastic moulding. This is mentioned in passing in the PortablePlus technical manual (of all places). I also believe (and measurements + calcualtor schematics confirm this) that Spice and Woodstock chargers are electrically identical, the difference is the connector only. Which makes sense since the battery packs are 2 AA cells in each case, and the resistor/diode circuit in the calculator is the same for the 2 series.

Re: Spice Chargers Message #12 Posted by Ronald on 19 Apr 2006, 4:07 p.m., in response to message #11 by Tony Duell Hi Tony, The 2 Zeners inversed over the potput would make sense. It is a a kind of over voltage protection which for the more sensitive Cont. Memory chips. Thank you Ronald

Re: Spice Chargers Message #13 Posted by Tony Duell on 20 Apr 2006, 7:39 a.m., in response to message #12 by Ronald I don't think it's really an overvoltage protection, more a glitch supression. From what I remember, those zeners (at least for the Topcat charger) are something like 27V. I think I read somewhere that it wouldn't damage a Continuous Memory machine to use the old (A-version) charger, but there was a risk that the continuous memory would be corrupted.

Re: Spice Chargers Message #14 Posted by Trent Moseley on 20 Apr 2006, 3:16 p.m., in response to message #13 by Tony Duell Tony, My 25C came with an A-version charger, and I've never had a problem with the continuous memory. tm

Re: Spice Chargers Message #15 Posted by Walter B on 20 Apr 2006, 6:15 p.m., in response to message #14 by Trent Moseley ... so the conclusion is: we've uncovered another case of Voodoo?

Re: Spice Chargers Message #16 Posted by Trent Moseley on 21 Apr 2006, 9:37 p.m., in response to message #15 by Walter B You mean we need dolls & needles? tm

Re: Spice Chargers Message #17 Posted by Walter B on 22 Apr 2006, 2:48 a.m., in response to message #16 by Trent Moseley Depends, Trent ;-) However, to me it seems nobody could answer Ronald's question so far: Quote: Maybe a dummy question, but what is the difference in the A and D version in specification, different output voltage, max. current? So, I concluded calling the unproven claim of a difference "Voodoo". If dolls and needles help (you), you are free to use them. d:-) Edited: 22 Apr 2006, 2:48 a.m.

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