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DIY Tube Headphone amp?

wanderfowl

wanderfowl

Resident Phonetician
This may be a non-existent sort of thing, but I'd kinda like to make a smallish tube headphone amp for use at work. This seems like a good intro sort of project for me, and well, let's face it, it'd be pretty awesome to have tube glow at my desk.

I've considered the bottlehead SEX, but it seems a bit large. Any suggestions on where to start?
 
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Hopefully someone will chime in with some good suggestions.
In the meantime you might check out the Head-Fi forums. That is THE headphone forum and they have lots to say about headphone amp kits.
You will have to do some searching though.
http://www.head-fi.org/forums/
 
Pete has several designs on his wonderful website.
I built a couple of examples of his earlier, low-voltage hybrid HP amp/preamp and think it's a dandy little device for a very reasonable cost.

Be sure to spend some time perusing his website; Pete's an incredible resource to this hobby.

www.pmillett.com
 
What an interesting design! Using the filaments as the source resistor on the MOSFETs. Cool!

I do have a question, though...how's he getting -19v? He references a -48v supply in the text, but the schematic shows (apparently) +48 as the main supply, with the +48v on the drains, with -19 on the filaments.

Be gentle, just learning about FETs!:D

Clay
 
Fisherdude said:
What an interesting design! Using the filaments as the source resistor on the MOSFETs. Cool!

I do have a question, though...how's he getting -19v? He references a -48v supply in the text, but the schematic shows (apparently) +48 as the main supply, with the +48v on the drains, with -19 on the filaments.

Be gentle, just learning about FETs!:D

Clay
Click to expand...

Perhaps that's not a "minus" but a "dash" before the 48 in the text, and the diagram shows ~19V, not -19V...
 
I built the Hagerman Castanet. It's a great headphone amplifier with lots of iron for excellent sound...but that makes it of the not cheap variety. If you search here, you will find some pics of my build.
 
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