Details：

Ground Grid gg Stereo Tube preamplifier

Works voltage: +DC200V 0 -DC200V and + DC12V

PCB Size: 132X132mm

thickness: 1.5mm

copper thickness 50um.

This board is use 3pcs 12AU7 tubes.

Note：

Bare pcb：just 1pcs pcb，have not any parts


Suitable power supply board link: https://www.ebay.com/itm/353064178327

Picture 2 of 2

Picture 1 of 2



Assembled board ，just for reference：

图片 2 - 高保真真空管缓冲前置放大器板/套件基础上地面网格 GG 前置放大器