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Old 26th November 2009, 09:45 AM   #1
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Default Searching 2 matched pairs 2sa1492 and 2sc3856

HI, i`am looking for 2 matched pairs of 2sa1492 (o) and 2sc3856 (o) for my denon PMA 1560 amplifier.

So i mean 2 couples of 2sa1492 (o) and 2 couples of 2sc3856 (o)


Who can help me.


Regards Rick...
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Old 26th November 2009, 06:02 PM   #2
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Old 27th November 2009, 09:33 AM   #3
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Old 27th November 2009, 09:38 AM   #4
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Or Onsemi subs..
http://www.onsemi.com/pub_link/Collateral/NJW0281-D.PDF
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Old 27th November 2009, 11:04 AM   #5
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A : you do not need matched pairs
B : 130W Sanken replacements are 2SA1492 and 2SC3856, can be bought just about anywhere for €3 each.

You should check if the driver devices are still ok, those Denon models have a somewhat unorthodox driver stage of Hitachi TO220 MOSFET drivers and Rohm BJT devices.

Hitachi/Renesas J78/J79 and K215/K216 are obsolete and do €4 to €5 each, replacements are J313/K2013 but will cost you more if you buy only 2 pairs.
The Rohm B1328/D2004 are +1W high voltage/current Vas transistors, replacements for the Rohms will be difficult to find.

(you'll have to exchange the Miller caps at the Vas if you step up to other output devices)
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Last edited by jacco vermeulen; 27th November 2009 at 11:17 AM.
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Old 27th November 2009, 05:08 PM   #6
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When i use the OnSemi MJL4302/MJL4281 instead of 2sa1492 and 2sc3856, are there any things that have to be changed, or can i use them instead of.

Now vr501 and vr502 are set on 8mv must it be changed voor the OnSemi`s
And vr503 and vr504 on 30mv (1khz test tone)

Where to buy the OnSemi MJL4302/MJL4281.
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Old 28th November 2009, 10:04 AM   #7
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MJL4302AG ON Semiconductor Bipolar Transistors
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