This is one piece of universal prototyping board using high quality FR4 and many PTHs (plated through holes). The board can cater for :
12 9-pin sockets( 12AX7, 6DJ8, 12AU7, EL84 etc.) maximum or ;
12 7-pin sockets maximum (6x4, 6z4 small rectifiers etc.)
PCB dimension: 20cm x 15cm. PCB thickness 1.6mm
