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I am not sure what you are asking about those transistors. Which way they will face? It shouldn’t matter as long as the correct pins are connected to the right place in the circuit. I believe that is ground, don’t hold me to that but it looks like it based on its placement. And finally yes a 25v cap will work. The voltage is merely a rating of how much it can handle. I believe the only difference would be that the 25v cap would be a bit larger.
bacteria wrote:And also, what is - is that ground???
Yup!
Is this a 10uf capacitor: I have some 10uf capacitors, 25v - I presume these are ok?
Yes they are. You can replace an electrolytic capacitor with any other electrolytic capacitor as long as the new one's capacitance (farads) is the same, and the rated voltage is the same or greater.