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Just check the numbers on it. It is a 2SC1969 final - or it should be. Which makes it a bipolar transistor - and it can be checked with a diode checker. IF it was a mosfet like a irf520 or erf2030, it would need a few volts applied to it to open up the 'gate'. The 1969 is harder to get, and don't buy them from China/eBay; they are phony. Been there; done that.

There are a few places that still sell real ones on the net, like RF Parts for one . . .

[QUOTE="Robb, post: 255745, member: 8446"] Just check the numbers on it. It is a 2SC1969 final - or it should be. Which makes it a bipolar transistor - and it can be checked with a diode checker. IF it was a mosfet like a irf520 or erf2030, it would need a few volts applied to it to open up the 'gate'. The 1969 is harder to get, and don't buy them from China/eBay; they are phony. Been there; done that. There are a few places that still sell real ones on the net, like RF Parts for one . . . [/QUOTE]

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