3W Pure Class-A AMP

DarkHorse · 20th January 2005, 07:26 AM

I design this Circuit Lastyear(2004)...
But Mr.Pass(Nelson Pass)had work it out as preamp in 1996...
God..

Ok,let's see the Circuit:

DarkHorse · 20th January 2005, 08:33 AM

per channel power waste about 52Watte,
Output 3.25W(6ohm load)!!!

Upupa Epops · 20th January 2005, 09:04 AM

What do you waiting from this connection ?

DarkHorse · 20th January 2005, 11:04 AM

yes,I'm a new comer of diyaudio...
what do you think of this circuit?
I want to build one of this amp...
but short of some compenents...WoWo

Upupa Epops · 20th January 2005, 11:09 AM

If you are newcomer, all is OK

- I wish you best results and many enjoy with it

.

DarkHorse · 20th January 2005, 11:35 AM

Thank you,Mr.Upupa Epops
about 1 or 2 month later,I will show This AMP to you all..
it's so simple and easy to do,but need very large heatsink..
and high power transformer..

PMA · 21st January 2005, 10:58 AM

Nice design

. Please let us know your listening impressions. Maybe you are losing a little bit more power than necessary

Circlotron · 21st January 2005, 12:16 PM

Darkhorse, this is one I made about 2- 1/2 years ago and is still going well. It uses a big choke instead of a resistor and so it has half the power loss than usual.

Circuit. http://www.diyaudio.com/forums/attac...amp=1054194645

The complete thread.
My first ever Class A amp.

DarkHorse · 22nd January 2005, 01:16 AM

Quote:

Originally posted by PMA
Nice design . Please let us know your listening impressions. Maybe you are losing a little bit more power than necessary

hi,PMA:
the amp didn't work out yet!But trying my best now--buying electric device and its out shell ..etc
I hope the circuit will sounds good,my friend told me that can it compare with 2A3 vacuum tube amp..
in fact,I don't own both of them now..haha
same as you expect,I doing things for it!
have fun!

Quote:

Originally posted by Circlotron
Darkhorse, this is one I made about 2- 1/2 years ago and is still going well. It uses a big choke instead of a resistor and so it has half the power loss than usual.

Circuit. http://www.diyaudio.com/forums/attac...amp=1054194645

The complete thread.
My first ever Class A amp.

hello,Circlotron:
I read your post thread "My first ever Class A amp",we almost have same idea of class-a amp form,yours is using inductance winding,the efficiency near to 50%...High!I saw the same idea in passlab.com, nelson pass new design zen-7,good idea..
but the high quality inductance is hard to DIY or buying!is it?
I don't want to change my mind-Use aluminium case power resistance,only this I can choose for this circuit..
and I hope it will sounds truly..
happy!

DarkHorse · 22nd January 2005, 01:24 AM

I have make some change with the circuit..
now it don't need regulated power supply..
more high voltage supply,burning 67watte to get 4watte(RMS) output power!just like SOZ's hot..
see the update schematic diagram:

21st January 2005, 12:16 PM	#8
Circlotron diyAudio Member Join Date: Jun 2002 Location: Melbourne, Australia	Darkhorse, this is one I made about 2- 1/2 years ago and is still going well. It uses a big choke instead of a resistor and so it has half the power loss than usual. Circuit. http://www.diyaudio.com/forums/attac...amp=1054194645 The complete thread. My first ever Class A amp. __________________ Best-ever T/S parameter spreadsheet. http://www.diyaudio.com/forums/multi...tml#post353269

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20th January 2005, 08:33 AM	#2
DarkHorse diyAudio Member Join Date: Jan 2005 Location: GuangDong	per channel power waste about 52Watte, Output 3.25W(6ohm load)!!!

20th January 2005, 09:04 AM	#3
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	What do you waiting from this connection ?

20th January 2005, 11:04 AM	#4
DarkHorse diyAudio Member Join Date: Jan 2005 Location: GuangDong	yes,I'm a new comer of diyaudio... what do you think of this circuit? I want to build one of this amp... but short of some compenents...WoWo

20th January 2005, 11:09 AM	#5
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	If you are newcomer, all is OK - I wish you best results and many enjoy with it .

20th January 2005, 11:35 AM	#6
DarkHorse diyAudio Member Join Date: Jan 2005 Location: GuangDong	Thank you,Mr.Upupa Epops about 1 or 2 month later,I will show This AMP to you all.. it's so simple and easy to do,but need very large heatsink.. and high power transformer..

21st January 2005, 10:58 AM	#7
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	Nice design . Please let us know your listening impressions. Maybe you are losing a little bit more power than necessary

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