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Old 23rd October 2002, 03:07 AM   #1
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Default Picture of my first tube amp

This is my first tube amp (for headphone) based on http://headwize.powerpill.org/projec...bender_prj.htm

Click the image to open in full size.

Sorry for the bad quality of the picture, I only have a video camera.
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Old 23rd October 2002, 03:08 AM   #2
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Click the image to open in full size.
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Old 23rd October 2002, 12:16 PM   #3
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Default HEADPHONEAMP

Nice work,Francois.

It's even got a belly buttun.


Salut,
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Old 23rd October 2002, 12:24 PM   #4
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How does it sound?
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Old 23rd October 2002, 12:55 PM   #5
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The big circle in the front is in fact the headphone jack. The best spot was on the left side of the transformer but the tubes are heating so it is always possible that the headphone wire touch the tube and melt. So I decided to put it on the front and make a big hole to reach the jack because the wood (oak) is 0.75'' thick.

I am not very good to describe what I hear but for sure it's sound different than my integrated Denon amp (with a headphone jack). I will run the amp for a few hours before doing some serious listening. The only problem is that I have a small hum even if I have routed carefully the wires and used a star ground.

I am usually a solid state and loudspeaker guy, but this amp was so easy to build (and fun) that I am already thinking about building a more powerful amp for normal speakers.

Forgot to put inside picture but there is no PCB, it is point-to-point wiring.

Total cost: 100-120$ US.
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Old 23rd October 2002, 02:35 PM   #6
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very pretty. do you have a shematic available?

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Old 23rd October 2002, 02:57 PM   #7
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Please follow the link in my first post.
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Old 24th October 2002, 06:51 PM   #8
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Default Re: Picture of my first tube amp

Nice work François

One of the appeals of tube amps are their relative simplicity. Watch you don't get addicted :^)

dave
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Old 24th October 2002, 09:04 PM   #9
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Great job François..I'm always jealous when I see nice metalwork like yours...

Happy with the sound? After listening for a couple of days?

How did you ground the filamant supply???

AC or DC?


Cheers,
Bas
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Old 24th October 2002, 09:58 PM   #10
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Thanks you very much guys.

Dave, I try to finish my Totem Arro Clone first I will add this to my future projects list.

The metal work was not so hard even if I did not have the right tools. I did a lot of very small holes If you refer to the link that I have provided, the filament grounding is floated with a capacitor to the ground.

The only thing that is missing is a anti-thief feature because I want to bring it at work. Maybe putting the chassis at 350V ??
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