HP 11C with 15C keyboard?

[awink]

Hi,

I got an used HP 11C and see some differences to the key assignment as on pictures available on the net. Manufacturing date is 42/1984. Self test works as expected, keyboard test also.
EDIT: ...

Thank you in advance,
awink.

EDIT:
It's an 11C with an 15C keyboard. Oh no. Expensive spare parts depot.
@ Moderator: Please delete post; I'm not allowed to (?).

[Dieter]

(02-05-2015 12:30 PM)awink Wrote:  For example (all regarding blue shift):
On EEX-key, instead of >P, the Symbol "Pi" is printed.
On +-Key, instead of x=0, Cy,x is printed.
On the x-Key, instead of x>0, x=0 is printed.

This really sounds like your 11C has some 15C keys. However the functions should be the ones of the 11C, so pressing 3 [ENTER] 4 [g] [EEX] should return 5 and not pi (=3,141592654).

HP really may have re-used some 15C keys for other voyager calculators. I remember a picture of a re-painted key where a close look revealed the original function that could still be seen because of the contours that remain from the injection molding process. Please visit the museum's collector's corner, about halfway down the page ("10C Series Versions").

But maybe I'm completely off track here, so let's have the community give the definitive answer.

Dieter

[Dieter]

(02-05-2015 12:30 PM)awink Wrote:  EDIT:
It's an 11C with an 15C keyboard. Oh no. Expensive spare parts depot.
@ Moderator: Please delete post; I'm not allowed to (?).

If you really want to delete your message (and the whole thread with it) you may do so by clicking the EDIT button, select Full Edit and check the "Delete" box on top of the edit page. But why do you want to do so? I think this is an interesting find that should get documented and discussed. :-)

Dieter

[awink]

Hallo Dieter,

thank you for your response.
I asked for deletion, because of not using forums space for a eventually "repaired broken" device.

I meanwhile comprehended, its a 15C-keyboard in an 11C-device; 3 [ENTER] 4 [g] [EEX] returns 5, as you stated.

I contacted the seller and I am not assuming fraud per se; the calculator looks used and the wear level of the keys perfectly fits to the wear level of the rest of the device.

Interesting...

BR, awink.

[Dieter]

(02-05-2015 01:52 PM)awink Wrote:  I asked for deletion, because of not using forums space for a eventually "repaired broken" device.

Well, I do not think that space is an issue here. ;-)

(02-05-2015 01:52 PM)awink Wrote:  I meanwhile comprehended, its a 15C-keyboard in an 11C-device; 3 [ENTER] 4 [g] [EEX] returns 5, as you stated.

Now, that sounds interesting. Could you post a picture?

Dieter

[awink]

Here is the picture.

   

For example, to bottom of the right of the GSB-key is somewhat dirty between the bezel and the key. Also, some dust is "on the right place" of the other keys. If the keyboard was changed, it was done a long time ago.

EDIT:
Definitely, it`s an early (1984 regarding the serial) 11C (with the help of http://www.hpmuseum.org/collect.htm):
"Early HP-11Cs had a bug in which if you entered a number in the form 0.0xxx, backspaced over all the digits and then pressed ENTER, 1.00 was entered rather than 0.00. HP allowed users of buggy calculators to swap for fixed units."
It displays 1...

awink

[Gerson W. Barbosa]

I have some spare 11C keys, including 'EEX', '*', '+', '-' and '1', in case you want to replace them.

Gerson.

[awink]

@Gerson:
Wow, what a service! Yes, please, of course. This would improve the usability very much.

awink.

[Gerson W. Barbosa]

(02-05-2015 05:43 PM)awink Wrote:  @Gerson:
Wow, what a service! Yes, please, of course. This would improve the usability very much.

awink.

I think it will be easy to attach them to a pair of postcards. Just send me a shipping address through private mail and I'll send them tomorrow.

Gerson.