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?
Spice Chargers
|
|
« Next Oldest | Next Newest »
|
▼
04-18-2006, 01:57 PM
▼
04-18-2006, 02:36 PM
Hi, John; as you can check here, Spice is the 'name' of the HP3xE/3xC series. So, the HP33E/C is one of the SpiceĀ“s. Cheers. Luiz (Brazil) ▼
04-18-2006, 02:52 PM
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) Notice how the 82087D is not mentioned. Should it be?
Thanks, ▼
04-18-2006, 02:56 PM
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.
04-18-2006, 03:06 PM
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 ▼
04-18-2006, 03:15 PM
Thank you, all. John Bobinyec ▼
04-18-2006, 04:47 PM
Hi all, Maybe a dummy question, but what is the difference in the A and D version in specification, different output voltage, max. current?
▼
04-18-2006, 05:11 PM
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. ▼
04-18-2006, 06:11 PM
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. ▼
04-18-2006, 06:43 PM
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. ▼
04-19-2006, 06:38 AM
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.
▼
04-19-2006, 04:07 PM
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 ▼
04-20-2006, 07:39 AM
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. ▼
04-20-2006, 03:16 PM
Tony, My 25C came with an A-version charger, and I've never had a problem with the continuous memory. tm ▼
04-20-2006, 06:15 PM
... so the conclusion is: we've uncovered another case of Voodoo? ▼
04-21-2006, 09:37 PM
You mean we need dolls & needles? tm ▼
04-22-2006, 02:48 AM
Depends, Trent ;-)
However, to me it seems nobody could answer Ronald's question so far: Quote: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. |