HP-97 Charger Spec



#5

I recently came upon a HP-97 that is missing it's charger. I would like to improvise a power source so I can determine if the calculator is functional before I try to purchase a charger for it.

Information on this web site says that the HP-97 requires a charger that puts out 8 VAC at 3 VA. On the calculator, near the charger connector, it says "5 VOLTS 2 WATTS".

Comments, explanations, and/or suggestions are welcomed.


#6

Well, that agrees with the information printed on my HP-97 and the information printed on the AC adapter it came with. I can't explain the discrepancy.


#7

Hi;

there are at least six HP AC adapters compatible with HP97's original. All topcats (HP9x) may use them, also the original HP41 peripheral printer 82143A and some HPIL devices, like the 82161A (tape drive) and 82162A (thermal printer). All of these "guys" are powered by the same battery pack, too.

The three AC adapters I own that can be used with these equipments are:

82059B
82066B
82040B

all of them have the same output connector and they are rated:

8 VAC
3VA ow 3W(82059B

I think the HP97 input specs are for mean average AC input voltage while 8VAC is the AC adapter voltage itself. As I have no HP97 (at least so far), I cannot go any further about the calculator specs.

Hope this helps a bit.

Luiz C. Vieira - Brazil


#8

If you want to test it, just connect four rechargable batteries (AA is ok) to reach 4.8 to 5.2 volt aprox. Then connect it as you can to battery contacts.

Take care, the "-" is the battery contact closest to the edge of the battery holder.

The charger is 8 Volt because it has to charge 4 batteries 1.2V. Take into consideration that it is AC and the calculator has a diode and a resistor. It is ok. Never use this adapter it without a good battery pack connected. You could damage the calculator because the battery itself guarantees the correct volts. even when charging.

I hope I have helped you

Cheers

Jon


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-67 charger Marcel Samek 3 1,168 11-22-2013, 10:45 PM
Last Post: Marcel Samek
  HP charger 82002c for handheld calculators Dave Burson 2 975 05-19-2013, 12:51 PM
Last Post: Dave Burson
  Classic (HP-67) charger issues revisited Matt Agajanian 6 1,549 05-20-2012, 10:50 PM
Last Post: Matt Agajanian
  HP-35 Charger/Adapter Repair (82002C) LHH 0 644 05-19-2012, 01:21 AM
Last Post: LHH
  HP-67 wall charger Wytnucls 2 898 04-19-2012, 10:13 PM
Last Post: Dan W
  HP 97 charger Harald 2 845 03-30-2012, 02:01 PM
Last Post: Harald
  Which charger for a35 Matt Agajanian 3 973 03-23-2012, 02:58 AM
Last Post: Marcus von Cube, Germany
  HP 67, 97, 97+ emulator Olivier De Smet 8 1,861 11-11-2011, 09:57 AM
Last Post: Israel Otero
  Aristo M85 -- What charger? Gene Wright 9 2,067 11-03-2011, 04:56 PM
Last Post: Mike (Austria)
  HP97 charger Olivier De Smet 5 1,196 09-20-2011, 06:53 AM
Last Post: Paul Berger (Canada)

Forum Jump: