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MC2505, driver board
MC2505, driver board
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Old 2nd September 2006, 05:49 PM   #1
peterberlin is offline peterberlin  Germany
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Join Date: Sep 2006
Default MC2505, driver board

Hi all

I have bought an old MC2505 with a defect driver board.

The schematics did not tell me something about the industrial part number of the transistors.

I was wondering if anyone can tell me if there is a replacement for the transistors:

Q132-070 and 132-054

Or (at the best) with a listing of replacements for all the semiconductors.

I just crawled the net without success...

Thanks in advance

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Old 3rd September 2006, 08:40 AM   #2
djk is offline djk
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Location: USA
132-070, NPN for outputs, MJ15003.

132-054, NPN for diff input pair, MPSA06.

Drivers are RCA 40409/40410, hard to find.
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Old 28th December 2006, 01:15 AM   #3
Frank J.Y. Lin is offline Frank J.Y. Lin  Taiwan
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Join Date: Dec 2003
Location: Taipei
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Dear Peter,

I am also an owner of mc2505.
I am looking for the schematics to replace the old electrolyte capacitors.
Do you mind send me a copy of schematics of mc2505?
Thanks for your kindness in advance.
by the way, mc2505 is a good amp, congratulations!

best regards,
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