Board size: 114 × 76mm
Board thickness 2mm
Single group AC power supply → 2pieces 6H2 to rectify → 2pcs EPCOS 10U500V high voltage capacitor
→ 10H50mA choke → phillips 33U/450V electrolysis, choke center tap 10U400V capacitor,
total four-stages filtering.
1. High voltage full-wave rectification and filtering power supply board, choke four-stage filtering.
2. 6H2 small 7pin feet is a special tube for communication ultra-short wave detection.
The capacitance between the poles is small and the working frequency is high.
3. 6H2 rectifying tube belongs to the vacuum space charge movement mode.
the sound quality is much better.
4. The tube preamplifier rectifier uses 6H2 circuit to replace 6Z4, which is a commonly
used low-frequency low-power rectifier. the sound is richful.
5. Circuit characteristics: single voltage supply, full wave bridge rectifier filtering,
current 20mA, for preamp use
6. Imported Z11 used iron core material for tube output transformer for choke coil!
EI57X30 specification sheet thickness 0.35mm, oxygen-free copper enameled wire wrapped.
