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Copper resistance increases with temperature.

Copper has one of the highest positive thermal resistance coefficient (TRC) of all metals. For this reason, cold choke has lower DCR than when it is heated by current passing through and warmer environment of working amplifier. Metal in resistors has much lower TRC than copper, so value doesn't change much with temperature. Carbon resistors have negative TRC (their resistance drops with increasing temperature.


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  • Copper resistance increases with temperature. - sser2 17:13:27 03/18/17 (0)

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