The JJ 6V6 will add some sparkle and new life to that Fender Deluxe Reverb and Tweed Deluxe. This new robust tube can withstand high plate voltages reliably. Almost indistinguishable in tone from NOS. This tube can take higher plate voltages. We are sourcing most JJ tubes through Ruby now. The Ruby 6V6GTCZ is from JJ.