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Old 20th January 2005, 07:26 AM   #1
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Lightbulb 3W Pure Class-A AMP

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:
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Old 20th January 2005, 08:33 AM   #2
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per channel power waste about 52Watte,
Output 3.25W(6ohm load)!!!
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Old 20th January 2005, 09:04 AM   #3
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What do you waiting from this connection ?
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Old 20th January 2005, 11:04 AM   #4
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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
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Old 20th January 2005, 11:09 AM   #5
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If you are newcomer, all is OK - I wish you best results and many enjoy with it .
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Old 20th January 2005, 11:35 AM   #6
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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..
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Old 21st January 2005, 10:58 AM   #7
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Nice design . Please let us know your listening impressions. Maybe you are losing a little bit more power than necessary
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Old 21st January 2005, 12:16 PM   #8
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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.
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Best-ever T/S parameter spreadsheet.
http://www.diyaudio.com/forums/multi...tml#post353269
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Old 22nd January 2005, 01:16 AM   #9
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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!
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Old 22nd January 2005, 01:24 AM   #10
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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:
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