I'm sure the above mentioned 6SN7 tubes are all outstanding but they may not be so for your amp.
Note the 6SN7 tubes that the Wyetech spec sheet lists is GTA which is not the same as the GT tube.
I suggest you contact the Wyetech to be sure the GT will work with your amp
Note the 6SN7 tubes that the Wyetech spec sheet lists is GTA which is not the same as the GT tube.
I suggest you contact the Wyetech to be sure the GT will work with your amp