Shuguang 12AX7B (12AX7)
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1. Circuit design is modified based on Jadis JP200 tube preamplifier and the design values are optimized.
2. Six vacuum tube 12AX7 for first two stage common cathode amplification and final stage cathode follower, respectively for two channels.
3. Use of WIMA / Solen film capacitors, Nichicon Audio capacitors, BHC Averox capacitors, and Dale resistors.
3. Dedicated power and ground rails for tube power and tube filaments.
4. Symmetry in layout design for both channels.
5. Power requirement: 400V DC and 12.6V DC
6. PCB dimension: 210mmx175mm, thickness 2.5mm and 2oz copper, two layers.
1. HV400 Voltage Regulator Kit and Toroidal Power Transformer T30.
2. PS200 / TVR 6V6 Tube Voltage Regulator Kit and Toroidal Power Transformer T120.
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