Casio fx-61F: Scientific Electric Formula 27

[Dave Britten]

(04-07-2016 10:49 AM)jebem Wrote:  First the bad things:
- It looks cheap in your hands because it is very light, but then it is a small machine that should go nicely in your shirt pocket.
- It uses rubber keys that I dislike on CASIO machines, as they could do much better by using plastic keys as found on other CASIO models from the same era.

Now the good news:
- It works flawlessly.
- As usual on CASIO machines, the keys never fail to register, no matter how fast you type.
- To test the hybrid power supply on solar panel only, I removed the tiny small single battery cell (it brought a 1.5V AG7 alkaline inside). I can tell you this machine solar panel is super-sensitive, as it can wake up the calculator even in the dark shadow inside home. I never saw this performance before in any solar calculator.

I rather like the rubber Casio keys, because they're so easy on the fingers, and, as you mentioned, they're so responsive. I've got a handful of Casios, and I don't think any of them have failing keys (electronically or physically - they definitely used good rubber). Still trying to track down an fx-6000g.