Build a hifi tube amplifier with off the shelf components using the diytube printed circuit board, an IPC-compliant design. The PCB includes individual, adjustable cathode biasing which allows the user to match their tubes with precision. Instead of 12DW7's, the diytube stereo 35 uses a 12AX7A and 12AU7 combo. NEW VERSION E! Includes: manual, parts list. Rev. E OUR FULL ST35 REV E. AMP KIT IS HERE: ST35 FULL AMP KIT DIYTube ST35 Driver Board w/Instructions -REV. E - DISCONTINUED - MANY PARTS STILL AVAILABLE diytube35brd$59.95 www.DIYTube.com Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com