Details：

Inspired by Marantz 7 Phono Riaa circuit, Professional DIY products for Audiophile, High-quality Gold-plated pcb

PCB size: 120x260mm

Can use tubes model:
ECC83 / 12AX7 ×3 + 6X4 ×1
6N2 ×3 + 6X4 ×1

Transformer requirements:
AC250-AC270V, ＞30MA,
0-AC12.6V, ＞2A
0-AC6.3V @2A For 6X4 tube rectifier

Note :

This is diy bare pcb ,not included any parts !