HP 82143A versions



I remember that once there was a posting regarding different versions of the HP 82143A printer for the HP-41C, but I can't find it anymore. So, does anybody know about different versions? I have an old printer (produced 1980) which has a blue and red jack(?) on the left hand side. My printer from 1987 does not have them. What are they good for? The manual on the MOHPC-DVD does not mention them.

Regards, Frank.


Hi, Frank;

I was never told about these external jacks as well, but I wonder about the color: should they not be a way to power the printer from the outside? Blue for negative, red for positive? Have you measured for existing voltage across these jacks?

Just a guess.

Best regards.

Luiz (Brazil)


Hey Luiz, happy new year!

I have some questions about a program for my CV and i have a new computer so i lost all my email address... :-)




Hello, Michel;

happy new year for you and all folks at the Forum.

Be my guest, my friend: lcvieira@quantica.com.br

Congrats for your new computer!

Best regards.

Luiz (Brazil)

(Michel: if you want to, use 12345 to remove this message)



maybe you meant the different case layouts of the printer?
The older ones used to have the LED's look out of the case, the newer ones have the LED's hidden behind the panel overlay. Someone wrote here that the reason for this change was to get a better shielding against high frequency emissions from inside the printer.

And then there are the printers with the 'brighter' (greener) case. I'm not sure if the 43A was ever made with the green case.




These jacks were custom added to connect a power supply. I have once acquired a 82143A with a similar modification. Maybe the orignial power supply failed and the owner wanted to save the money for a new (original) one...

Cheers, Victor


Hi there,

I don't have a multimeter until Monday, but this is how the jacks look like:

Seem to be made very well. Yes, maybe to connect to an external power supply.

Regards, Frank.


that *is* a modification done by a previous owner. if it is not done properly (i.e., without a series diode to prevent reverse polarity damage) and the accumulators are still installed, there is a chance of serious damage to the printer (and you), if you accidentially short those two jacks. so, just be careful.

cheers, hans

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-41 New versions of your favorite modules - with an AOS twist :-) Ángel Martin 13 1,018 06-21-2013, 01:29 PM
Last Post: Diego Diaz
  82143A Gamble Paid Off! Les Wright 4 386 10-13-2012, 01:25 AM
Last Post: Michael Lopez
  Charging Current in HP97, 82143A, 82162A Les Wright 5 531 06-17-2012, 02:11 PM
Last Post: Les Wright
  USB-41 82143A simulation update: MAN-TRACE modes Diego Diaz 0 215 06-09-2012, 08:46 PM
Last Post: Diego Diaz.
  HP 45 versions james summers 18 1,091 04-14-2012, 02:36 AM
Last Post: Eric Smith
  HP-41 USB-82143A info released. Diego Diaz 4 437 02-28-2012, 09:03 PM
Last Post: Diego Diaz
  Re: Richard Nelson's pictures of the 4 HP 15c versions Frido Bohn 0 215 02-27-2012, 09:44 AM
Last Post: Frido Bohn
  Re: Richard Nelson's pictures of the 4 HP 15c versions DaveJ 1 238 02-27-2012, 07:48 AM
Last Post: Jeff O.
  Re: Richard Nelson's pictures of the 4 HP 15c versions uhmgawa 0 183 02-27-2012, 07:17 AM
Last Post: uhmgawa
  Richard Nelson's pictures of the 4 HP 15c versions Gene Wright 17 977 02-25-2012, 07:34 AM
Last Post: robert rozee

Forum Jump: