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HP Forum Archive 13

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Questions about the HP71B
Message #1 Posted by jose goncalves (Brasil) on 29 June 2003, 11:41 a.m.

I've got a couple of questions about the HP71B:

1) What is the charger model for this computer ? Can we use a charger when using no-rechargeable batteries ?

2) How to use the HP-IL port (single type) ? I've been through the Archives and the email I faund for someone that had the information aparently is no longer valid. Can I have the PDF file of instructions for this type of HP-IL device ?

Thanks

Jose

      
Re: Questions about the HP71B
Message #2 Posted by Vieira, Luiz C. (Brazil) on 29 June 2003, 1:18 p.m.,
in response to message #1 by jose goncalves (Brasil)

Hello, Josť;

About the HP71B, I asked a few questions to Doc. Mike Meyer a couple of days ago and I was told that the same AC adapter used by the topcats (HP9x), HPIL printer and tape driver, HP9114B and HP82143A (HP41 printer) can be used with it. I tested and it works fine.

I am using four AAA NiCads with mine and I was also told by Doc. Mike Meyer that the HP71B cannot charge batteries. The AC adapter works the same way that the AC adapter for the HP82240A/B: it feeds part of the power, but cannot charge batteries. Kind of "power support".

If you have the MoHPC CD pack, have a look at CD #2 (if I am not wrong) and you will find the book "Controlling the Word with the HPIL". There are many good information there. I read a few parts of it briefly, because I'm still learning hwo to deal with the HP7.

One thing I did so far was to connect the HP41 to the HP71B and execute ID in the HP41 (if I am not wrong, ID is an Extended I/O function, not a standard HPIL funciton; you should check, please) and I could read:

[HP71     ]
in the HP41 ALPHA register. They talked to each other!

As I'm getting acquainted to the HP71 I'm asking more questions, too.

Hope this helps for now,

Best regards.

Luiz C. Vieira

            
Oops! Books are in CD #3...
Message #3 Posted by Vieira, Luiz C. (Brazil) on 29 June 2003, 2:15 p.m.,
in response to message #2 by Vieira, Luiz C. (Brazil)

Hello, Josť;

I was wrrong (again): the book I mentioned is in CD #3, BOOKS directory, and the file name is CNTHPIL.PDF.

It's worth taking a look at it.

Best regards.

Luiz C. Vieira

      
Re: Questions about the HP71B
Message #4 Posted by Gordon Dyer on 29 June 2003, 1:18 p.m.,
in response to message #1 by jose goncalves (Brasil)

The ac charger model for the 71B with 110v ac input is 820590. The power into the 71B is 8v ac 3W and any psu which supplies this is ok.
It does not charge batteries internally and the ac input is seperate from the batteries, it can be used on the 8v ac input without batteries fitted. Use 4x AAA alkaline batteries only (1.5V) not NiCd.
You need to fit batteries to maintain the memory contents when the ac power is off.
When changing the batteries have the ac power switched on to ensure that the memory contents are retained, otherwise there is only about 30 seconds of memory retention time.

            
Re: Questions about the HP71B
Message #5 Posted by jose goncalves (Brasil) on 29 June 2003, 3:02 p.m.,
in response to message #4 by Gordon Dyer

Ok, thank you. I'll be looking for this mountain of information and try to make the 71B and the 41C to talk to each other and some more things.

Jose


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