Changing Interest



#6

My interest in calculators started from a science background when power series and Bessel functions were interesting. At that time when I saw a financial calculator I thought Amort was a dead person!



However, now I have a mortgage and have to buy cars and other expensive things I have found a new interest in financial calculators, my collection has grown to include:

HP-38C

HP-12C (old and new)

HP-10B (old and new)

HP-14B 50th anniversary

HP-17BII (brown bezel)

HP-10BII

Commodore F4902



Car salesmen always look scared when I put one of these on their desk and check the repayments!

I would also like to get the financial modules for HP-41CV and HP-71. Can anyone help??



Gordon


#7

As your subject is "Changing Interest", may I suggest you
try and get a vintage Sharp PC-1421 Financial Pocket
Computer ?

You can have a look at it here:


http://pocket.free.fr/html/sharp/pc-1421_e.html


http://pocket.free.fr/images/sharp/pc-1421.jpg

It's a wonderful machine: very slim, lightweight,
metallic body, full alphanumeric dot-matrix display,
comes with 4 Kb RAM but admits extra RAM Cards, has an
I/O port to store/load programs on tape, or connect it
to a printer, etc.

But most importantly for your new interest, it
features a full array of financial functions (including
Internal Rate of Return, mortgages, date calculations,
anything) PLUS all usual mathematic functions and BASIC
language commands (i.e: trigs, logs, subroutines,
for-next loops, two dimensional arrays, long name
variables, string variables, etc).

Of course, all financial functions can be used
right from
the keyboard AND from BASIC programs !! :-) You can even
do machine language programming (PEEK, POKE, CALL) on the
machine itself (for instance to create and animate
graphics on the dot-matrix LCD), no accessories needed.

And, as a big plus, it's very fast, much faster than,
say, an HP-12C. Of course, with its memory, expandability,
speed, plus its powerful BASIC language extended with financial
commands, you can do real wonders with it, specially if
attaching a full-size line printer to it. Also, it has
continuous memory (of course), but the RAM cards with your
financial programs and data on them can be removed from
the machine or exchanged without losing their contents,
as well.

My advice: get one (eBay ?) fast, and you'll be delighted.
I certainly am with mine.


#8

WHAT??? IS this heracy, recommending a Sharp maching in the HP site???

#9

A few years ago, my wife and I were looking for a new car and one deal that a salesman gave us seemed too good to be true. I whipped out my HP 48GX and indeed it was too good to be true. Their deal maker had made an error.

The 48GX is indeed an amazing calculator!

#10

One place I like to check occasionally is The Bull Cabinet (http://members.aol.com/tbcab/private/hewlettpackard.htm). Having just checked after reading your post, I see that they have the GMAC I, II, and III modules listed - No prices though.


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