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Old 1st November 2007, 05:11 PM   #1
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Default Tube Headphone Amp?

Is there a tube headphone amp thats not very expensive? Like around $150? It can be commercial or DIY.
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Old 1st November 2007, 05:27 PM   #2
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http://www.ecp.cc/less-pressivo.html

Can be built for about $100 + a chassis, so $150 is quite reasonable. Sound, for the money, is great.
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Old 1st November 2007, 05:49 PM   #3
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Does he sell the PCB's that he used there? Be nice to have PCB's but I guess it could be possibel for me to attempt P2P.
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Old 1st November 2007, 06:28 PM   #4
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The "he" is me, and no, I don't have any PCB's for sale. Really, this is a quite easy build, so the PCB is not necessary at all. The one thing that a PCB might make easier is the CCS, and you might find some CCS boards floating around here. You can also get CCS boards from Bottlehead, K&K Audio, and DIYHiFiSupply -- any of which will work fine.
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Old 1st November 2007, 06:38 PM   #5
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Ah didn't realise it was you sorry! Ok I'll look into it. I'm kind of new to tubes and what not but looks pretty simple.
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Old 1st November 2007, 07:29 PM   #6
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I promised someone else a "complete" parts list, so I'll try to find some time in the next day or two to put that together.
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Old 1st November 2007, 07:34 PM   #7
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http://headwize.com/projects/showfil...=cmoy5_prj.htm

http://www.headwize.com/projects/cavalli2_prj.php
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Old 1st November 2007, 08:55 PM   #8
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Default Re: Tube Headphone Amp?

Hi Dougie

Quote:
Originally posted by Dougie085
Is there a tube headphone amp thats not very expensive? Like around $150? It can be commercial or DIY.
This triode(d) PP 100% class A one can be DIY-build for less than 100 Euros, has won several local tube audio community shootouts and even can drive small speakers, too. A few copies of the original design even were built by others who participated in the shootouts with their own designs

Also, this circuit was shown as part of my ETF06 lecture to demonstrate what can be achieved with ultra-cheap "TV-tubes", using pentodes (or pentode sections) triode strapped.

Regards,

Tom
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Old 1st November 2007, 09:01 PM   #9
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The one I built was pretty cheap. Two 6.3V filament transformers back to back into a voltage doubler, a 12AU7 direct-coupled to another 12AU7 White CF. It sounds gradually better and better

Construction Pics (disregard the signal schematic)
http://www.diyaudio.com/forums/showt...71#post1233371

Final signal schematic:
http://www.diyaudio.com/forums/showt...64#post1233964
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Old 1st November 2007, 10:18 PM   #10
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www.little-tube.com


Have a look at the MKIII
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