DC SE MOSFET Class A thermostabilized

widowmaker · 11th December 2005, 10:27 AM

My last project...
It works perfectly...

lineup · 11th December 2005, 11:31 AM

Very nice low power pure class A amplifiers.
I like low power class A.
They have good enough power to drive most at normal listening levels
and output is high quality.

In your case
+-12V supply with 8W in 4 Ohm
and
+-15V supply with 9W in 8 Ohm.

Using 2SK1529/2SJ200 output MOSFETS.

Super

Netlist · 11th December 2005, 11:57 AM

Looks nice, please provide some details for the non-EE's like me.

/Hugo

widowmaker · 11th December 2005, 11:58 AM

The output power is good enough

, I have backloaded horns with fullrange drivers - Ether 5A (sensitivity 98dB/W/m)

widowmaker · 11th December 2005, 12:35 PM

Quote:

Originally posted by Netlist
Looks nice, please provide some details for the non-EE's like me.

/Hugo

Ok, but later, now I have a lot of work to do...

carlosfm · 11th December 2005, 12:49 PM

Quote:

Originally posted by lineup
Using 2SK1529/2SJ200 output MOSFETS.
Super

2SJ109 dual P channel jfet input stage.

This amp has some charm.

lineup · 11th December 2005, 12:52 PM

widowmaker,
You have another amplifier at your little website
with 3 stages:
JFET - MOSFET - BIPOLAR, 2SK301 - IRF9610 - BD911
called Death of GainClone.
Dont we all wish the sudden and soon death of all gainclowns ... ???

It makes good sense, to me, using MOSFET for voltage amp stage
and BIPOLAR for the output.
But not too often we see MOSFET doing the voltage amplification.
This is a well suited task for them.
I have had this idea myself.

Also you have an audio forum but with most in bulgarian.
I dont know a single word of bulgarian - not even can say 'Hello'.

Web source:
http://widowmaker.lozenetz.org/

widowmaker · 11th December 2005, 01:54 PM

www.bgaudio.org - This is our, bulgarian forum :-)
My forum is...only a good idea...but it doesn't work @ the moment

BTW, DoGC sounds incredible good...

lumanauw · 11th December 2005, 03:20 PM

Hi, Widowmaker,

Very nice cct's

Quote:

BTW, DoGC sounds incredible good...

At what bias this DoGC works? Is it hot classA or cold classAB?

woody · 11th December 2005, 04:04 PM

In the power supply there are 2 caps connected rail to rail
why are they there? I ask this because a while back I built
an amp with 10,000 uf on the + and - rails. I could hear
a big difference when I added another 10,000 uf to each
rail but when I added 60,000 uf rail to rail I could tell no
difference. I was rather disapointed at the time I thaught
I had found a home for those pair of 60,000 monsters.

11th December 2005, 11:58 AM	#4
widowmaker diyAudio Member Join Date: Nov 2004 Location: Sofia, Bulgaria	The output power is good enough , I have backloaded horns with fullrange drivers - Ether 5A (sensitivity 98dB/W/m) __________________ Audio Researcher Daniel Petrov also known as widowmaker

11th December 2005, 01:54 PM	#8
widowmaker diyAudio Member Join Date: Nov 2004 Location: Sofia, Bulgaria	www.bgaudio.org - This is our, bulgarian forum :-) My forum is...only a good idea...but it doesn't work @ the moment BTW, DoGC sounds incredible good... __________________ Audio Researcher Daniel Petrov also known as widowmaker

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11th December 2005, 11:31 AM	#2
lineup diyAudio Member Join Date: Dec 2005 Location: the north	Very nice low power pure class A amplifiers. I like low power class A. They have good enough power to drive most at normal listening levels and output is high quality. In your case +-12V supply with 8W in 4 Ohm and +-15V supply with 9W in 8 Ohm. Using 2SK1529/2SJ200 output MOSFETS. Super

11th December 2005, 11:57 AM	#3
Netlist diyAudio Moderator Join Date: Jan 2003	Looks nice, please provide some details for the non-EE's like me. /Hugo

11th December 2005, 12:52 PM	#7
lineup diyAudio Member Join Date: Dec 2005 Location: the north	widowmaker, You have another amplifier at your little website with 3 stages: JFET - MOSFET - BIPOLAR, 2SK301 - IRF9610 - BD911 called Death of GainClone. Dont we all wish the sudden and soon death of all gainclowns ... ??? It makes good sense, to me, using MOSFET for voltage amp stage and BIPOLAR for the output. But not too often we see MOSFET doing the voltage amplification. This is a well suited task for them. I have had this idea myself. Also you have an audio forum but with most in bulgarian. I dont know a single word of bulgarian - not even can say 'Hello'. Web source: http://widowmaker.lozenetz.org/

11th December 2005, 04:04 PM	#10
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	In the power supply there are 2 caps connected rail to rail why are they there? I ask this because a while back I built an amp with 10,000 uf on the + and - rails. I could hear a big difference when I added another 10,000 uf to each rail but when I added 60,000 uf rail to rail I could tell no difference. I was rather disapointed at the time I thaught I had found a home for those pair of 60,000 monsters.

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