Picture of my first tube amp

FrankDIY · 23rd October 2002, 02:07 AM

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

Sorry for the bad quality of the picture, I only have a video camera.

FrankDIY · 23rd October 2002, 02:08 AM

fdegrove · 23rd October 2002, 11:16 AM

Nice work,Francois.

It's even got a belly buttun.

Salut,

dibblethwaite · 23rd October 2002, 11:24 AM

How does it sound?

FrankDIY · 23rd October 2002, 11:55 AM

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.

michael_tn · 23rd October 2002, 01:35 PM

very pretty. do you have a shematic available?

-- michael

FrankDIY · 23rd October 2002, 01:57 PM

Please follow the link in my first post.

planet10 · 24th October 2002, 05:51 PM

Nice work François

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

dave

Bas Horneman · 24th October 2002, 08:04 PM

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

FrankDIY · 24th October 2002, 08:58 PM

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 ??

23rd October 2002, 02:07 AM	#1
FrankDIY diyAudio Member Join Date: Mar 2001 Location: Quebec City	Picture of my first tube amp This is my first tube amp (for headphone) based on http://headwize.powerpill.org/projec...bender_prj.htm Sorry for the bad quality of the picture, I only have a video camera. __________________ Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein FrankDIY's Audio Corner

23rd October 2002, 02:08 AM	#2
FrankDIY diyAudio Member Join Date: Mar 2001 Location: Quebec City	__________________ Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein FrankDIY's Audio Corner

23rd October 2002, 11:16 AM	#3
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	HEADPHONEAMP Nice work,Francois. It's even got a belly buttun. Salut, __________________ Frank

23rd October 2002, 11:55 AM	#5
FrankDIY diyAudio Member Join Date: Mar 2001 Location: Quebec City	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. __________________ Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein FrankDIY's Audio Corner

23rd October 2002, 01:35 PM	#6
michael_tn diyAudio Member Join Date: Oct 2002 Location: Lenoir City TN	N very pretty. do you have a shematic available? -- michael


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23rd October 2002, 11:24 AM	#4
dibblethwaite diyAudio Member Join Date: Sep 2002 Location: Leeds, England	How does it sound?

23rd October 2002, 01:57 PM	#7
FrankDIY diyAudio Member Join Date: Mar 2001 Location: Quebec City	Please follow the link in my first post. __________________ Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein FrankDIY's Audio Corner

24th October 2002, 05:51 PM	#8
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	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 __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

24th October 2002, 08:04 PM	#9
Bas Horneman diyAudio Moderator Emeritus Join Date: Apr 2002 Location: The Netherlands Blog Entries: 18	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

24th October 2002, 08:58 PM	#10
FrankDIY diyAudio Member Join Date: Mar 2001 Location: Quebec City	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 ?? __________________ Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert Einstein FrankDIY's Audio Corner

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