Guru
Joined: 05/03/2018
Location: NetherlandsPosts: 5994
| Posted: 11:43am 08 Dec 2020 |
I threw mine away when I got my first TI57. Now I regret it.
The TI57 stopped working after something got defective inside the battery box (there is a convertor in it).
Followed up by a "cheap" Casio FX82 with broken ON/OFF switch that I bypassed relying on it's build in low power standby mode. It is still working on it's second set of AA batteries ! .... real low power.. This calculator is really amazing quality. Even the keys all work flawless without a cleaning or anything after almost 45 years. On the second set of AA's.
And I gathered on a flea market a HP12c (a broken one for $0.25 that I cleaned and repaired) that I use daily. But it has no geometry (sin/cos/tan). It is a financial calculator.
Still looking for a HP10c, 11c, or 15c on flea markets... But prices are outrageous now, especially when not defective.
Volhout
Edited 2020-12-08 21:47 by Volhout