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)
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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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.
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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