HP-67 tantalum capacitor: where to buy it?

[Archilog]

(10-25-2018 12:22 AM)teenix Wrote:  

(10-24-2018 10:16 PM)Archilog Wrote:  Hello,
It seems that I have to change this component because my HP writes but doesn't read cards.
HP-97 schematics didn't help so much because capacitance (6,8 uF) is mentionned but voltage is missing.

Thanks in advance.

I don't have a HP67 circuit, but probably similar.

I assume the capacitor in question is connected to R1/R2 near Q1 in HP97 card reader circuit.

This cap is connected to ground and Vss which is shown as +6.25V.

If this is the problem, then a 6.8uF 10V or 16V tantalum might be a better choice. These are commonly available from hobby or other electronic suppliers

cheers

Tony

I thought the voltage was a problem, but if you say so...
Thank you, Tony.