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2nd February 2002, 04:00 PM
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#1 |
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diyAudio Member
Join Date: Feb 2002
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Class A high-end amp?
Has any body a Class A amp plan, mosfet, high-end. 25 W per chanel aprox.? I Woul like put at the input an 1 V line level? I think woul be a power amp (without preamp). Thanks.
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2nd February 2002, 04:44 PM
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#2 |
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diyAudio Member
Join Date: Aug 2001
Location: Central FL
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PASS DIY
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2nd February 2002, 05:20 PM
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#3 |
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diyAudio Member
Join Date: Feb 2001
Location: illinois
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There is also the Lang Class A amp from "Audio Electronics" (formerly known as "The Audio Amateur" when the project appeared. I think their web site still lists the PCB for sale. The TO3 metal case lateral Hitachi MOSFETs are no longer produced though. You could do a little surgery to use some of the TO3P or TO247 plastic package lateral MOSFETs from Hitachi or Toshiba.
mlloyd1 |
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4th February 2002, 12:03 PM
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#4 |
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diyAudio Member
Join Date: Jan 2002
Location: Belgium
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Hawk A18 kit?
It's a commercial kit, not a project. A PP 20W class AB amp (10W class A) without loop feedback.
I just had one in for review, and it is indeed a very sweet but powerful and solid performer. http://www.audio.nl/speca18.html 
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4th February 2002, 06:27 PM
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#5 |
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The one and only
Join Date: Mar 2001
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The upcoming Zen with an active current source
will reach those levels. Should be out in 3 weeks. |
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4th February 2002, 06:29 PM
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#6 |
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diyAudio Member
Join Date: Jul 2001
Location: Italy
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class A amplifier
I found this URL
http://www.gmweb.btinternet.co.uk/index.htm#index have you experience with these circuits? ciao Filippo www.audiofanatic.it |
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4th February 2002, 07:03 PM
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#7 |
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diyAudio Member
Join Date: Apr 2001
Location: UK
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Filippo
It depends which one(s) you are interested in. There are a number of different Class-A designs on my website ranging from the Hiraga 'Le Monstre' at 4Wrms into 8ohm to Stan Curtis' 60W circuit. I haven't built them all, but can recommend the JLH Class-A which has been highly regarded for the past 30 years and is still generating very favourable comments from new constructors. Geoff |
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