Home » Audio » Thermionic Emissions » Headphone Amplifier
Headphone Amplifier [message #74291] Mon, 29 October 2012 20:51 Go to next message
gofar99  is currently offline gofar99
Messages: 1068
Registered: May 2010
Location: Southern Arizona
Illuminati (2nd Degree)
Hi Everyone, I just finished up a tube based headphone amplifier. The project was sent to diyaudioprojects.com for posting when Gio gets it massaged for use there. (allow a few days please). Anyhow the amplifier part is simple but the power supply a little more complicated. An easy and fairly cheap (probably under $150 if you are frugal) project that has really nice sound. Very quiet, full range and can drive nearly any phones. Best matches are with 32 to 300 ohms. Others may work ok depending on their sensitivity and impedance. The schematic is attached. The power transformer is about $15 from Edcor and the outputs are about $18. index.php?t=getfile&id=899&private=0index.php?t=getfile&id=900&private=0


Good Listening
Bruce
Re: Headphone Amplifier [message #74295 is a reply to message #74291 ] Mon, 29 October 2012 22:36 Go to previous messageGo to next message
Wayne Parham  is currently offline Wayne Parham
Messages: 16836
Registered: May 2009
Illuminati (33rd Degree)

Really nice looking, Bruce. Thanks for posting it here!

Re: Headphone Amplifier [message #74296 is a reply to message #74295 ] Mon, 29 October 2012 22:39 Go to previous messageGo to next message
gofar99  is currently offline gofar99
Messages: 1068
Registered: May 2010
Location: Southern Arizona
Illuminati (2nd Degree)
hi Wayne, Thanks for the kind words. The full project covers how to build the amplifier and some considerations that might not be obvious from the schematic. Is there a place that such projects can be posted. Even though this is a short one, it is about 5 pages long.


Good Listening
Bruce
Re: Headphone Amplifier [message #74299 is a reply to message #74296 ] Tue, 30 October 2012 08:06 Go to previous messageGo to next message
Wayne Parham  is currently offline Wayne Parham
Messages: 16836
Registered: May 2009
Illuminati (33rd Degree)

There is such a place. Let's put it in the group build forum!

Re: Headphone Amplifier [message #74334 is a reply to message #74299 ] Thu, 01 November 2012 22:43 Go to previous messageGo to next message
gofar99  is currently offline gofar99
Messages: 1068
Registered: May 2010
Location: Southern Arizona
Illuminati (2nd Degree)
Thanks for reminding me, I had a senior moment. Just don't tell my spouse. Laughing Anyhow, this project and one for building a pair of class A valve mono blocks using EL84 are in the group build section. Razz


Good Listening
Bruce
Re: Headphone Amplifier [message #74668 is a reply to message #74291 ] Fri, 30 November 2012 00:33 Go to previous message
Azuri  is currently offline Azuri
Messages: 202
Registered: November 2012
Master
Excellent contribution. Thank you. I'm learning more these days on how to get better audio from my sources of music, and you are helping in that regard.

Just thought I'd share that.
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