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例1 日立录像机开关管的代换:日立M757、M747录像机开关电源开关管2SK1198损坏后,很难买到,根据经验可用国内市场上易买到的场效应管BUZ311(5A、1000V、150W),该管的尺寸、电流、功率都大于2SK1198。曾在几台机器上代用,效果很好。需注意是原电路上S极与散热片相连,而BUZ311是D极为散热极,要用绝缘片将管子与散热片隔开。
Example 1 Hitachi VTR switch substitution: Hitachi M757, M747 VTR switch power switch 2SK1198 damaged, it is difficult to buy, based on the experience available in the domestic market, easy to buy FET BUZ311 (5A, 1000V, 150W), The tube size, current, power is greater than 2SK1198. Used in several machines, the effect is very good. It should be noted that the original circuit connected to the S pole and heat sink, and BUZ311 is D very heat sink pole, to be insulated with the tube and the heat sink separated.