Does the HP41 know what it is?

Everything about 41C 41CV and 41CX Hardware

Does the HP41 know what it is?

Postby spamme0 » Sat Aug 01, 2009 6:21 am

Is there a way to get the hp41 to tell me what it is?
I bought a calculator that looks exactly like a HP41, except that
it has no stickers, labels, no identifying marks at all.

I tried a few calculations and it does the same thing as my hp41CV.

All the keys below the 789 row are normal.
Above that row, there's nothing printed on the keytops.
The alpha characters are printed on the front slope.
There's nothing printed on the calculator surface...I'd call it the
overlay, except it's really the underlay...

Another slight difference is the display. On my "real" hp41, the display
looks uniform when off. On this one, you can faintly make out the metalization
patterns that make up the display characters.

Is there any secret key function to get it to divulge identifying
information? It does have a serial number stamped into the case...
2113A01632

Portland is not that far from Corvallis. I suspect this is a prototype of something.
I'm trying to figure out exactly what it is and if its uniqueness gives it any
collectible value.

Thanks, mike
spamme0
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Joined: Sat Aug 01, 2009 5:55 am

Re: Does the HP41 know what it is?

Postby hthse » Sat Aug 01, 2009 6:56 pm

It is a blanknut, a calculator meant to be loaded with custom software and not used as a regular hp41.

The serial number indicates it is made in 1981. On the LCD at that time you can see a hint of the segment patterns when off. Later LCDs disguise it better and I guess the hp41 you have and are used to is of a later vintage.
hthse
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