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What is this? A fuse?

Alex abahmed

Apr 19, 2015
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Hey so I'm fixing an old Yamaha ta20 wedge amp from the 60's and it has a bunch of these battery looking things. Not sure exactly what they are but this one in particular reads 337ohms. I tried looking up the part number printed in the front but could find anything helpful. I have a feeling it's a fuse but if it was there should be no resistance? Any help would be appreciatedimage.jpg image.jpg
 

davenn

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Sep 5, 2009
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Hi Alex
welcome to EP :)

its a power transistor

I find no reference for the 25092, its not a standard transistor manufacturing part #
so is probably an inhouse part number of the equipment manufacturer


Dave
 

Alex abahmed

Apr 19, 2015
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Apr 19, 2015
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you mite be right !! :)

the pic is so blurry I may have misread it

Alex, can you please confirm that number ?


Dave
Thanks! Yeah sorry the picture was so blurry, but you were right it says 25092. Do you know how I could figure out what to replace it with if that's an in house part number and not a type of transistor? Or is that what Neal was saying? It's a 2sd92 npn?
 

davenn

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can you please rephoto it and get it really sharp
 

davenn

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thanks for the clarification pic, Alex :)

yup definitely 2SD92 :)
 
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