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-   -   Headphone amp with tube PS (http://www.diyaudio.com/forums/headphone-systems/95143-headphone-amp-tube-ps.html)

Phergus_25 28th January 2007 03:54 AM

Headphone amp with tube PS
 
Hey guys,
I have been using tubes for headphones for a good while, and have a pretty nice amp as of right now. But I have been really looking to make a nice amp and want to go with pretty nice stuff.
Total budget would be like $400, but I could be convinced...
I am looking to give a pretty high current, I use Audio-Technica W5000s which are 50 ohms. I am looking to also have a tube rectified PS, I think thats the right wording, and I'm wondering what yall would suggest.
Although it dosent really matter tubes that are big and look cool would always be a +!
Iv read a good bit but im still unsure of exactly waht to build. I would be cool with if there is a PS i should look at and then attach that to an amp design or somethign.
thanks
-greg

sorenj07 28th January 2007 04:30 AM

http://headwize.com/projects/showfil...=cmoy5_prj.htm

give it a thorough read, it seems to put out adequate current.

Stixx 28th January 2007 09:18 AM

morgan jones aka cmoy
 
2 Attachment(s)
same as above, but with tube rectified psu...

90% built, chassis is in the making and about to be painted.






EDIT: for lower impedance headphones the same schematic with nfb might be better...psu is still the same.

Stixx 28th January 2007 09:19 AM

2 Attachment(s)
will look something like this...

Geek 28th January 2007 11:22 AM

Quote:

Originally posted by Stixx
will look something like this...

Sexy :cool:

Looking forward to the pics :)


Quote:

EDIT: for lower impedance headphones the same schematic with nfb might be better...psu is still the same.
White-CF are one of my favorite topologies for an ECC88 and family. You may find the compromise of NFB+low-Z phones not worth it. Just my :2c:

Phergus_25 28th January 2007 01:40 PM

I have heard a morgan jones and really dont think that even if it was built with top tier parts it would best my 6080 12ax7 amp.
I was thinking something with alittle more bite. And ideas?
Thanks for all the suggestions as of yet.
-greg

Stixx 28th January 2007 01:54 PM

more bite....
 
What about this one??

http://www.tubecad.com/2006/04/blog0062.htm

Built with 6CG7 and 6H30 it should have plenty of drive.
Build any psu you like to go with it...

(PCB's are resting in my drawer...)

sorenj07 28th January 2007 04:31 PM

if you read the article you'd see that the schematic is modified somewhat (#4)...

Phergus_25 28th January 2007 04:40 PM

that looks like it could do the trick.
Any links that are expecially good for that amp, the version you are talking about, and a sutable PS?
thanks
-greg

Stixx 28th January 2007 06:15 PM

2 Attachment(s)
Broskie says that the amplifier has very good PSRR, but still a decent psu should be used...
My implication also will have a tube rectified psu, probably dual mono, but for the low impedance variant something like this could do...

I assumed a total current draw of 88mA, using a 5U4 as rectifier. Anything smaller will of course also work but I like the look of those big rectifier tubes...;)

rgds,
Oliver


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