Fine because the amp is using two 6SJ7 which are like one 6SN7.
The 6SJ7 is 1/2 a 6SN7.
Glenn's OTL's, SinglePower and others that use one 6SN7 driver need a tween type adapter.
Glenn, our friend sent me 2 beautiful flat plate 6BL7's amongst the other nice tubes so I am fine.
I am very pleased to know you are helping me cure my addiction by introducing me to more tubes!!!!!!!!