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Old 21st June 2006, 05:59 PM   #1
tcl2 is offline tcl2  France
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Default High end diy amps schematics

Hello
Could someone indicate me diy links for amps having a commercial
equivalent of about 2,000 or 3,000 dollars?
For instance, is it possible to find a Jeff Rowland like amp schematic(or some other trade mark) being of the same quality but not of the same price...
Thank you
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Old 21st June 2006, 06:07 PM   #2
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If you search, you will find better amps on this site than any of those overpriced famous brands. Oh, and there might well be the odd schematic as well.
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Old 5th July 2006, 08:07 PM   #3
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Hello! an interesting design is the Power Follower 99, similiar to pathos amps....the designer's Andrea ciuffoli have a website: www.audiodesignguide.com ... if you couldn't find the schematics write me and I can mail you the copy of the schematics appeared in the Italian DIY magazine "costruire HI-FI" ... ;-)
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Old 6th July 2006, 03:41 AM   #4
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The power follower was the first Class A amp that I built. It is only ok in my book and its output is capacitively coupled so there is that problem too... but its a good beginners amp to build. When you shop for heat sinks decide on what you want and then double that size and you might have enough. For that size amp it runs really, really hot!

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Old 7th July 2006, 03:12 AM   #5
Leolabs is offline Leolabs  Malaysia
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Hi,tcl2 www.passdiy.com
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Old 7th July 2006, 07:51 AM   #6
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Hello! yes the output stage is decoupled By a 4700 uF capacitor to block the DC....but you must consider thath most of the design with no output capacitors have a double power supply (in this case tha amp work with a single power supply...) so the capacitors on the signal path remain two....

I have buildt other class A amp (this one is no the best but not so bad... ;-) )...

I post the schematic...
Attached Files
File Type: pdf pwrfollower.pdf (29.3 KB, 506 views)
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Old 7th July 2006, 04:27 PM   #7
forr is offline forr  France
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--- most of the design with no output capacitors have a double power supply (in this case tha amp work with a single power supply...) so the capacitors on the signal path remain two....---

This kind of amps can deliver DC, so their power supply cannot be considered in the signal path. If it were, the caps would limit the low frequencies response.
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