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HP-67 versatility



#9

Hello all.

Being that my 67's card reader is on the fritz, do you consider the 67 versatile & functional enough without the reader? Yes, although I'd need to reload a program/registers by hand every time, is the 67 without the reader still a viable calc?


Edited: 17 Mar 2012, 12:38 a.m.


#10

"Viable" depends on what you're trying to do with it.

#11

Until the card reader gets cured, to me, the 67 still packs quite a punch! I've had an SR-56 so, I am willing to put effort into writing & running programs only to have them erased. But, the 67's efficiency makes my programming very streamlined.

And, even if I need to key in a 150+ line program, either I can key it in spurts and let the charger give the juice while I switch between taking a break and keying in the rest of the program. So, I think the 67 without the card reader will suit me in the interim.

Edited: 17 Mar 2012, 2:51 a.m.


#12

HI.

I have always considered that creating a program is one of the first consequences of one original problem: repeated calculations with the same keystroke sequence. Usually, either we have a short, fast keystroke sequence that will be used a lot of times (this is the case for the HP55, HP25, H32S, etc.) OR a longer, more time consuming keystroke sequence with many traps and decision-making structures that would be used not too often. In this case, storing this longer keystroke sequence is advantageous so calculators with large program memory USUALLY offer a way to store programs in external media. Both HP28S and HP42S are good examples of how uncomfortable a lack of external storage media is. Users will surelly feel sad, disappointed and wishing to die when [Memory Lost] is the phrase of the day... Nightmare!

Cheers.

Luiz (Brazil)

#13

The HP-67 is still viable for relatively short programs (50 to 60 steps?). Otherwise, re-keying long programs that come close to the machine's capacity is an exercise in patience. That's why continuous memory is king among models like the HP-25C, HP-29C, HP-33C, HP-34C, HP-41C, and so on.

Namir


#14

And there is also the mechanical stress, which may eventually lead to faulty or, even worse, broken contacts.

Cheers.

Luiz (Brazil)


#15

Very true ... and that is why emulators/simulators have their advantages. There are 2 disadvantages. First the lack of physical contact. Second, the possible incompatibility with new versions of operating systems.


#16

I believe the reader can be repaired to work longer than the original. I think it well worth the repair. Sam


#17

If it is done right. I am not a hardware repair person. I have noticed a few messages here and on eBay where folks have tried to fix the card reader and did not succeed.


#18

Matt, I'm not a hardware repair person just when I was child, I spent a lot of time in assemblying ships and aircrafts models, then in painting and repairing SUBBUTEO players, a game in which I was found, all this words to say that I've a little experience with micro objects threating and handling, the use of glue and paints, no absolutely experience (except the school time) in soldering microcircuits (I'would like have the ability of Luiz!). ...don't worry: I succedded anyhow in card reader repairing, it means that if you try you can do it yourself!!
At the beginning I was very near to reapair a couple of them, buying on e-bay all the stuff which need for this pourpose and following the instructions on the net; I did almost the job, but I was not able to fix a problem with the clutch. One thing is torepair obtaining that the card pass throgh and the ad reads it, another is to got it whithout any error in reading!
I received a big help from a friend here on the board (he is really a magician) and both the readers were repaired properly (he did the adjusting job).
Three months ago I bought a calculator like new on e-bay with a card reader for a few money, it was near mint, but the card reader ofcourse not working due to the gummy leakage. I opened it and I cleaned it accurately (following the wise advices of that great friend) I succedded even to fix the reader moving the motor only one time, and to reconnect the signal cables (maybe the most difficult operation)at the first attempt and IT WORKS GREAT ! I did it all myself. If you consider what I told you at the beginning and that I've a problem with the left hand known as "the carpal tunnel syndrome", you have at least thousands chance more to succed in it, TRY!


Edited: 23 Mar 2012, 9:32 a.m.

#19

Assuming that your card reader problem is the standard "disintegrating roller" problem, repair should not be difficult. Those of us who have done it a few times find it pretty simple after the first two or three attempts.

However, it can be intimidating and difficult the first time. It's especially easy to accidentally tear loose a fine wire, or lose one of the millimeter-diameter nylon balls that operate the internal switches.

So if you're not comfortable doing it yourself, get someone else to do it. I think a working card reader would greatly increase the enjoyment you get from using the calc.

#20

Alrighty then! It looks like I'm gonna have the reader repaired! And, while I'm at it, if need be, have some other parts spiffed up to spec!

Edited: 17 Mar 2012, 4:38 p.m.


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