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Old 24th August 2004, 09:23 PM   #1
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Default 2SB645,2SD665 substitutes

I am rebuilding a Marantz 2330B receiver that has the original toshiba output transistors , I am collecting parts presently ;considering 1 channel has shorted outputs. I could source the original type , but am concerned about getting fakes. Is the MJ 15024 or MJ15016 a decent sub? Having trouble finding details on the originals.
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Old 25th August 2004, 04:42 AM   #2
lubbie is offline lubbie  Canada
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If you can get your hand on some MJ 21195/96's you won't go wrong. I've used them in numerous amps and have nothing but praises for these new beauties.. They are just fantasic audio transistors.
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Old 25th August 2004, 06:45 AM   #3
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Hello gents,

I only can confirm that the MJ 21195/21196 are perfect substitutes for your originals. I have used MJ21193/21194 which have slightly lower SOA in several Sony and Technics Amps successfully.
Due to my information the originals do have a wider bandwith but it seems to be more forgiving to use slower substitutes than faster ones.
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Old 25th August 2004, 07:39 AM   #4
lubbie is offline lubbie  Canada
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If you cant get the MJ21195/96 get some MJ15024/25 which are easily available everywhere and are used lots in amp output stages.. They may have a low bandwith but are more then acceptable...
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Old 25th August 2004, 07:17 PM   #5
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Thanks for the input , will proceed with your recommendations.
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