The circuit design is modified based on the McIntosh and the design values are optimized. It uses three 12AX7 vacuum tubes for amplification and uses one pentode-triode vacuum tube 6F3P (6BM8) as voltage regulation. Vishay 1N5062 forming a bridge provide for full- wave rectification. The resulted ~300V DC. A low dropout regulator LM1084 is used to supply the filament. As theresistors and capacitors are low-noise with good channel matching, resulting low distortion in sound quality.
Features
1. Three vacuum tube 12AX7 for amplification and one 6F3P (6BM8) for regulation.
2. Use of WIMA / Solen AC coupling capacitors, Nichicon Audio capacitors, Philips / BHC Averox decoupling capacitors, and Dale resistors.
3. Built-in rectification and regulation circuit.