NOTE: This is a revised PCB, R3, which fixes an offset issue on the previous board.  The PCB is now GREEN.

This is a  partial kit to build the DIY version of the "Sangaku" headphone amp / preamp.  It uses two Korg nutubes, as well as solid state circuitry.  It has one balanced input on XLR connectors and one unbalanced input, an unbalanced line output, and both balanced and unbalanced headphone jacks.

The kit includes the PCB (a 4-layer board), two nutubes, two anti-vibration mounts for the nutubes (that mostly remove all the microphonic issues with using a nutube), and two LSK389B dual JFETs.  The rest of the parts are available from the usual sources like Mouser and Digi-Key.

For full details on the design, including  the schematic, bill of materials, and other information refer to my web site at www.pmillett.com 

This auction is for the  PCB, two nutubes, two anti-vibration mounts, and two LSK389B JFETs  only - the other parts ARE NOT included.   Photos of completed  board and packaged unit are for reference only!  

Flat rate shipping via FedEx to US destinations is shown.  

LIABILITY DISCLAIMER

A person who constructs or works on electronic equipment may be exposed to hazards, including physical injury, the risk of electric shock or electrocution, and exposure to hazardous substances such as lead, mercury, and other inorganic or organic compounds.  These hazards can result in health problems, injury, or death.  Only qualified persons who understand and are willing to bear these risks themselves should attempt the construction of electronic equipment.  By purchasing this item, the buyer acknowledges these risks.

Vacuum tubes operate at high temperatures, may contain toxic substances, and may have exposed parts that carry hazardous voltages.  There is a risk of electric shock, electrocution, burns, or fires that is inherent in the construction and use of vacuum tube equipment.  By purchasing this item, the buyer acknowledges these risks.

IN NO EVENT SHALL THE SELLER BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE including, but not limited to, property damage, personal injury, death or legal expenses. Buyer's recovery from Seller for any claim shall not exceed the purchase price paid by Buyer for the goods, irrespective of the nature of the claim, whether in warrant, contract or otherwise. By purchasing this item, BUYER AGREES TO INDEMNIFY, DEFEND AND HOLD SELLER HARMLESS FROM ANY CLAIMS BROUGHT BY ANY PARTY REGARDING ITEMS SUPPLIED BY SELLER AND INCORPORATED INTO THE BUYER'S PRODUCT.

If you do not agree to this disclaimer, DO NOT BUY THIS ITEM.