|Re: HP-30? - no, it's a TI-30!!|
Message #3 Posted by Bill Wiese on 5 Feb 2003, 8:33 p.m.,
in response to message #1 by Eaglevu
> had an "HP-30" basic scientific calculator,
> back in the early 80's. Why is it not listed
> here? Similar to the -31E, but slightly simpler
> and with a metalic gold faceplate. I remember
> being able to push multiple buttons simultaneously
> to get it to power on. Also, very light weight.
Sorry, not listed here because it was a TI, not HP, calc.
You must be thinking of a TI-30. One of the most common scientific calcs in the world. Gold faceplate for keypad. Power on/off was done from keypad with [ON/C] button. Since the keypad had row/column coding, holding the corner keys [1/x],[EXCH] and [=] keys simultaneously would also trigger [On/C] actuation.
They are very light, as you say, because in addition to Klixon-style keyboard, there's only a small PC board with one skinny-DIP chip and an LED bubble-strip display, a resistor, and a 9V battery clip. Also the shell was lighter weight, IIRC, than other calcs with similar form factors from TI (SR-51/SR-52, etc.)
They came out in 1977-78, maybe a tad earlier. My dad bought me my TI30 in 1977 from a super Safeway store for $30 as part of a "Student Math Kit" package with a fairly decent text to explain why logs and trig functions were useful.
San Jose, CA