View Full Version : Vacuum Tube Headphone Amp

08-21-2006, 07:35 PM
How I spent my afternoon. http://www.epicrevival.net/projects/headphoneamp2/

08-21-2006, 07:39 PM
T00bs :rolleyes:

Good work though, I wish I had time for my similar projects :(

08-21-2006, 07:49 PM
I'm using it right now. =)

08-21-2006, 08:03 PM

Well, it's playing music. The tubes are glowing and the noise floor is lower than it used to be. All in all, it's a perfectly working vacuum tube headphone amp. A quick test with a multimeter rates it at roughly 1.5 watts per channel, which will cause my headphones to blow if I'm not careful. I usually use Sony M838 earbuds, which you can find at Best Buy or Walmart for $10, or Amazon.com for about $4. They're cheap enough to replace once every other month, and they sound good.

08-21-2006, 08:10 PM
nice work nukka...

08-21-2006, 09:17 PM
Speaking of tube amps, does a solid state amp in outer space = vacuum tube amp ? :p:

08-21-2006, 09:23 PM
Not bad :)

08-21-2006, 09:24 PM
Speaking of tube amps, does a solid state amp in outer space = vacuum tube amp ? :p:

Perhaps, but I bet you could get one hell of a soundstage in space...if you could find a way to get pressure :)

08-22-2006, 10:34 PM
They should start making tubes in space. LOL :D:naughty::uhoh:

MAN GET SOME GOOD PHONES!!! Just a thought.....

08-23-2006, 10:06 AM
The initial amp itself was part of a Westinghouse record player. The record player part was done in by the rain and weather (left outside numerous years). I picked that up for free. Most of the amp itself was in good shape. I've spent around $60 repairing it, but I could have probably built it for about $130.

EDIT: But $130 is a rough, ROUGH estimate with no clue about the cost of transformers and tubes.

08-23-2006, 10:40 AM
The tubes are dirt cheap...

The transformers are where the money goes...and that's where the big improvements come :) But on a small project like this, not really worth it.