CASIO fx-3600P scientific calculator from 1985

[Csaba Tizedes]

(05-30-2018 08:31 AM)jebem Wrote:  Sure it works as an oscillator.

OK, as I can understand, the frequency is depends on the reciprocal of the resistor value: f~1/R.

Meantime I tried to find a calculator which I can dismantle and I think I will try it on a 3400P if it has same resistor inside or I have one workable but not so good shaped CASIO fx-6300G. If inside I found a crystal oscillator, can I try to change it?