Προοπτική Βάτραχου
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Prooptiki Vatrachou, a frog's eye view.

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Science day today
Most capacitors, especially electrolytic’s lose their capacitance when they get hot but temperature compensating capacitors are available in the range of at least P1000 through to N5000 (+1000 ppm/oC through to -5000 ppm/oC).

It is also possible to connect a capacitor with a positive temperature coefficient in series or parallel with a capacitor having a negative temperature coefficient the net result being that the two opposite effects will cancel each other out over a certain range of temperatures.
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