All Hitachi Lateral Fet amplifier for DIY described by Paul Kemble

I don’t want to discourage anyone, but it seems to me that a big part of an amplifiers sound are it’s Vas.
You started well with MOSFETs but are now completely off the reservation.
Is it only due to a lack of said semis? Maybe there exists a solution?

PM if interested.

R
 

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TheFinisher, great job!
As I expected, the excitation problem was related to an attempt to replace components. After installing the original products, the problem disappeared. The maximum amplitude when powered by +-36V is 53V at a load of 8.6 Ohm. The quiescent current is 150mA. The amplifier is excellent even with 2SK1058+2Sj162.
 
I don’t want to discourage anyone, but it seems to me that a big part of an amplifiers sound are it’s Vas.
You started well with MOSFETs but are now completely off the reservation.
Is it only due to a lack of said semis? Maybe there exists a solution?

PM if interested.

R
Hi there all. I agree here that a Vas is very important, special with mosfet outputs because of the large swing. Is it not a problem with the Jfets in future, because of these are obsolete including the Vas mosfets?