6SN7 tube GTA vrs GTB

I would like to know the difference between the designation GTA and GTB.

Thanks

fordmod07-04-2008 3:14pm

fordmod OP Details Discussions Posts This discussion Message User 30 posts 07-04-2008 at 05:48pm Copy Comment URL Report Comment Edit Delete Mechans Very good info... many thanks for sharing your knowlege!