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Replacement transistors for Yamaha PM1000 master module
Old 18th October 2011
  #1
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Thread Starter
Replacement transistors for Yamaha PM1000 master module

I am busy recapping the master modules in my Yamaha PM1000, but I may have damaged one of the transistors. I'm thinking of replacing them all if I'm gonna be doing one anyway. Problem is, I know very little about transistors and I have no idea what to get as replacements. The transistors on the modules are marked 2SA841 and 2SC1681.

Any idea what would be a good replacement or info on how I go about searching for replacements?
Old 18th October 2011
  #2
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Ike Zimbel's Avatar
 

I don't really think there's anything to be gained by wholesale replacement of the transistors. If they've lasted 40 years already, I'd leave them alone.
best,
Ike
Old 18th October 2011
  #3
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Thread Starter
Quote:
Originally Posted by Ike Zimbel View Post
I don't really think there's anything to be gained by wholesale replacement of the transistors. If they've lasted 40 years already, I'd leave them alone.
best,
Ike
Fair enough. I still may have to replace the one(s) I damaged.
Old 18th October 2011
  #4
lds
Gear Nut
 
lds's Avatar
Fairly common devices. An ECG or NTE 159 will work in it's (2SA841) place, but it's best to use the original.
Old 22nd October 2011
  #5
Best to replace them with something modern and quiet. 2SC3329BL for NPN and 2SA1084 for PNP.
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