[doulos24]

hi my name is Will and I'm new to head-fi. I'm a 32 year old electronics tech that's pretty much here for the diy stuff hope to meet some cool people and check out some interesting circuits. This was my last headphone amp I built. 
 
http://s240.photobucket.com/albums/ff10/doulos24/?action=view&current=new12au7amp.jpg
 
 burr brown 12au7 tube amp with a dual step attenuator and a fully regulated linear 12 volt psu       

 

[funch]

Welcome to the, um, institute for lighter wallets! There are plenty of DIY projects available.
 
www.diyforums.org
 
www.amb.org
 
www.cavalliaudio.com/diy
 
Kits/boards here: www.glassjaraudio.com or www.beezar.com
 
Ad infinitum

 

[jdkJake]

 burr brown 12au7 tube amp with a dual step attenuator and a fully regulated linear 12 volt psu       

This sounds intriguing. Your design? Care to share?

 

[doulos24]

This sounds intriguing. Your design? Care to share?

I'll share what I can. I bought the pcb from ebay for 10 bucks it's a 12au7 into a cmoy. It's a very simple circuit using a lm317 for the current like the typical 12au7 mosfet setups. I'll add a schematic soon. The power supply is a 15v 1 amp unregulated supply, then I added some filter caps 1000uf then 470uf then fed that into a lm317 adjustable voltage regulator circuit from jameco. There is zero hum or noise and I replaced the dual pot with a smd dual make before break dact style attenuator. 
 
http://www.ebay.com/itm/200781630746?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 pcb
 
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=lm317+kit&langId=-1&storeId=10001&productId=117621&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView psu block  
 
http://www.ebay.com/itm/SMT-Resistor-Step-Attenuator-100K-Volume-Control-/330684886562?pt=Vintage_Electronics_R2&hash=item4cfe5aee22 attenuator 

 

[doulos24]

Welcome to the, um, institute for lighter wallets! There are plenty of DIY projects available 
 
Thanks for that Funch I just ordered a skelton dac kit from that link 

 

[jdkJake]

Ah, a Fred_fred2004 amp.

He frequents these parts on occasion. I believe there are build threads dedicated to that amp and it's variants.

 

[Fred_fred2004]

I call it stalking

 

[jdkJake]

. I'll say!