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Author Topic: 6357B NPN Power Transistors  (Read 5184 times)

Jack1962

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6357B NPN Power Transistors
« on: July 13, 2008, 04:15:37 PM »
What's Up

        I'm repairing a Peavey Stereo Chorus 400, 1 of the of power amps transistors (marked 6357B) is bad (smoked, fried, and toasted) took out the emitter resistor with it. anyway I have seached online for this transistor , looked in my Allied cat. , it isn't listed. anybody hear have any idea what this thing cross ref's. to.

                                                Rock On

teemuk

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Re: 6357B NPN Power Transistors
« Reply #1 on: July 14, 2008, 10:31:53 AM »
Peavey's cross reference tells that SJ-6357 is MJ15003, which is a 140V NPN power transistor in TO-3 case. Does it sound right?

Jack1962

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Re: 6357B NPN Power Transistors
« Reply #2 on: July 14, 2008, 03:37:28 PM »
Yes that sounds about right the Voltage is a + and - 53 voltges on 2 sets of 4 in push-pull config , to reach 200 watts output power. Thanx Bro .
By the way if you don't mind saying where did you find the Peavey Cross-reference I couldn't find one?

teemuk

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Jack1962

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Re: 6357B NPN Power Transistors
« Reply #4 on: July 14, 2008, 10:13:44 PM »
Cool , Thanx Bro