8 pins tube socket 1.Attach to KT88/6550/EL34 2.Factory price and fast delivery Audio amplifier 8 pins tube socketused for 8-pin vacuum tubes such as EL34, 6CA7, KT88, 6P3P, 6550, etc.Its pins, the diameter of which is 3.2mm(2) and 4.0mm(2) respectively, are distributed in a cycle which diameter is 16.30mm. Used to EL34,6CA7,KT88,6550,6P3P,6L6GC. Audio amplifier 8 pins tube socket