My cascode JFET + MOSFET 150W power amp THD<0.04% at 159W.
Ultima-1 150W
And my Diamond Buffer Structure DB-01 pre-amp anounced at Head-Fi,
DB-01 on Head-Fi
Ultima-1 150W
An externally hosted image should be here but it was not working when we last tested it.
And my Diamond Buffer Structure DB-01 pre-amp anounced at Head-Fi,
DB-01 on Head-Fi
JF,
Thank you. The first virsion Q7,Q8 are 2SK246BL as Erno Borbely
suggested, but since
1. 2SK246BL is now lack in Taiwan,
2. 2SK246BL should be matched manually,
so next version you're right ,Q7,Q8 would be LS-844,too.
Ultima-1 is a normal SEPP structure, Q1 and Q2 I use matched
MPS8599, but if you like transistor pair such as 2SA1349,it is no
problem.
In the next version , I will use diamond buffer structure instead of
MOSFET 2SK214/2SJ77, to lower the input capacitance and higher
drive current, to make the amplifier's speed more fast,and of course
to enjoy the music.
Thank you. The first virsion Q7,Q8 are 2SK246BL as Erno Borbely
suggested, but since
1. 2SK246BL is now lack in Taiwan,
2. 2SK246BL should be matched manually,
so next version you're right ,Q7,Q8 would be LS-844,too.
Ultima-1 is a normal SEPP structure, Q1 and Q2 I use matched
MPS8599, but if you like transistor pair such as 2SA1349,it is no
problem.
In the next version , I will use diamond buffer structure instead of
MOSFET 2SK214/2SJ77, to lower the input capacitance and higher
drive current, to make the amplifier's speed more fast,and of course
to enjoy the music.
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