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|5th January 2004, 11:05 AM||#1|
Join Date: Aug 2003
Greening a Classic 2.
About 16 mohths ago I did B7 AMPLIFIER (B7_AMP.zip). Output devices
in class AB at 50ma each.
Now I am planing to do somthing like B7_MOS_AMP.zip. Output devices
at 500 ma each.
|7th October 2006, 04:44 AM||#3|
Join Date: Dec 2005
Location: the north
Boris MOSFET 2SK1058 2SJ201 Class A
I find your amplifier, new MOSFET Class A is a rather good one.
At least what I can see from your paper.
Bias is in Class A, 500mA/device = Total 1 ampere.
Will give teoretically close to 16 watt RMS ( +12dB SPL ) in true Class A output.
B7_MOS is not too complicated and still not too simplified to give problems.
Correctional small trim caps filters has been added to improve overall performance.
I would like to increase the current ( 6-7 mA ) in VAS stage considerably.
From this follows,
that for input stage I would increase to at least 2.5 mA or more per transistor
to better handle the control av VAS stage.
Your choice of transistors in input, 2SC2240
and for output, 2SK1058 / 2SJ201 are completely in my liking.
About the other transistors I do not know much,
but I am sure they will do the job.
Not every time at this board, we see people submit
such basically good amplifiers.
Hurray! For Russian DIYaudio.
I attach an unzipped schematic of your amplifier, Boris_7
Regards to Moscow
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