D
Daddy-O
New member
I Disagree
I have in my hand, a Chineese made 6V6GT distributed by RUBY. It does not have a bulge in the middle nor do the chineese made 12AX7's here on the table. I have also, a 6L6 from another amp that is a NOS (new old stock) that is a made in the USA Sylvania that is larger in the middle than at the end. The shape of the glass depends on the volume of gas needed to keep the fillament from oxidizing and burning away and this varies from manufacturer and models. The only way to identify the country of origin is to be familar with brands and makers and look for the Country's export mark on the tube.
I have in my hand, a Chineese made 6V6GT distributed by RUBY. It does not have a bulge in the middle nor do the chineese made 12AX7's here on the table. I have also, a 6L6 from another amp that is a NOS (new old stock) that is a made in the USA Sylvania that is larger in the middle than at the end. The shape of the glass depends on the volume of gas needed to keep the fillament from oxidizing and burning away and this varies from manufacturer and models. The only way to identify the country of origin is to be familar with brands and makers and look for the Country's export mark on the tube.