HP reverse polish notation scientific calculator

me | today | me

[Vendome]

Just open the case and clean with rubbing alcohol. Use a sponge as qtips leave trace cotton.

[HangnJudge]

You people scare me.
Buy a freaking notebook computer.

Computers were the size of rooms
when I was in school...

[mamelukesabre]

Ok.

Now tell me how to open the case!

I can’t figure it out. It appears to me the face plate is glued down on top of the screws you need access to...to take the thing apart. How do you pry up the face plate without destroying it?

[DaveTesla]

Take it apart and clean the membrane switches (conductive rubber)and the pads
on the pcb with rubbing alcohol and paper towels.
Worked for my 48g (my favorite).

[smokingfrog]

http://www.hpcalc.org/hp48/docs/opening/openitup.txt

[DaveTesla]

HP48 Disassembly (from the back)
http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=125

[OneWingedShark]

That’s actually a nifty device; it could make a handy tool when our energy-supply is cut.

[mamelukesabre]

THat won’t fit in my pocket protector.

[cynwoody]

That’s actually a nifty device; it could make a handy tool when our energy-supply is cut.

Yes. It's EMP-proof for sure!

[DaveTesla]

HP 48 Repair (details) 4971KB
Contains documentation and 45 photographs explaining how to open the HP 48 series for repair, including tips on repairing screen and keyboard problems.
By Han Duong (HPSolo).

http://www.hpcalc.org/hp48/docs/opening/hprepair.zip

(Zipped File for Download)

[smokingfrog]

http://commerce.hpcalc.org/48gii.php

[saundby]

The HP-50 has switchable modes, RPN is just one of its modes. It works a little different than the HP48s and earlier HP RPN calculators, but unless you have a lot of programs for the older calculators you won’t notice much difference.

The construction quality isn’t up to the HP-41C’s standards, but it’s comparable to the HP-48 series.

Overall it’s a nice calculator for the price. They don’t sell nearly as well as the TIs since the college textbooks all assume the student has a TI (HP hasn’t been as good at maintaining their position in education as TI. When I was in school, you had to have an HP-67 or 41, or if you couldn’t get better, an HP-25. Now most engineering students carry TIs, some of them run RPN entry programs on them.)

I still mostly use my HP-41CX and HP-41CV, they were built to a higher standard than the later models, and both still work like a charm. I also run an HP-41C emulator on my Palm.

[saundby]

I’ve got several notebook computers. Including three little Eee PCs that sit in strategic places near where I tend to end up. I have an HP calculator next to each one. Boot time: zero. App launch time: zero. Time to get the number I want: several seconds less than the shortest boot time on any computer I own newer than a C-64. ;)

[Political Junkie Too]

I was a TI person, myself. I guess that was a foreshadowing of the PC/Mac wars to follow.

-PJ

[GreyMountainReagan]

"The best part about owning an RPN calculator is enjoying the confusion of others who are not RPN-inclined who ask to borrow it."

I love it when people who don't know RPN try to use it. They almost toss it back in disgust.

[Buck W.]

“I love it when people who don’t know RPN try to use it. They almost toss it back in disgust.”

WHERE’S THE EQUALS SIGN???

[DaveTesla]

I purchased a 50g and rarely use it.
Never got used to the keyboard layout.
(horrid)
Still using the 48g and keep the 50g for backup.

[Vendome]

 

Looks like this and can be found on Amazon and Ebay

 

 

They also sell them at Williams Sonoma and Sur La Table

 

 

 

 

 

 

 

 

 

[mamelukesabre]

You still operate a C64???

I’m in awe.

[dayglored]

Nothing beats my trust ancient HP-16C programmer's calculator for long life and reliability.

I had an HP-35 when they first came out (early 70's), then an HP-45, an HP-11C, and finally the HP-16C. That has lasted me more years than I can remember...

Oh, the seduction of RPN...

I think in RPN.

In the mid-80's I wanted Reverse Polish on my early IBM-PC and Unix workstation, and wrote an RPN calulator program in C that mimicked the HP-45, including conditional looping, I/O to files, all sorts of stuff. It ported to VAX/VMS, Windows, Linux, you name it. I still use it as my main online calculator, when I don't have the HP-16C at hand.