Directory TUBES   Preamps   GT-12AT7 SAG-FHG Fender High Gain Kit GT-12AU7 SAG-FST Fender Soft Touch Kit GT-12AX7C SAG-MHG Marshall High Gain Kit GT-12AX7-R ST-12AT7 GT-12AX7-R2 ST-12AU7-Y GT-12AX7-R3 ST-12AX7-C GT-12AY7 ST-12AX7-R GT-5751M ST-12AX7-R2 GT-ECC83-S ST-12AX7-R3 SAG-AT7-MPI ST-ECC83-S SAG-AX7-MPI       Power   6V6 Family 6550/KT88 Family GT-6V6-C Duet GT-6550-C Duet GT-6V6-C Quartet GT-6550-C Quartet GT-6V6-C Single GT-6550-C Single GT-6V6-R Duet GT-6550-R Duet GT-6V6-R Quartet GT-6550-R Quartet GT-6V6-R Single GT-6550-R Single GT-6V6-S Duet GT-KT88-C2 Duet GT-6V6-S Quartet GT-KT88-C2 Quartet GT-6V6-S Single Tube GT-KT88-C2 Single ST-6V6-C Silver Series single tube GT-KT88-SV Duet ST-6V6-R Silver Series single tube GT-KT88-SV Quartet 6L6 Family GT-KT88-SV Single GT-5881C Duet ST-6550-C Silver Series single tube GT-5881C Quartet ST-6550-R Silver Series single tube GT-6L6-CHP Duet ST-KT88-C2 Silver Series single tube GT-6L6-CHP Quartet ST-KT88-SV Silver Series single tube GT-6L6GE Duet EL84 Family GT-6L6GE Quartet GT-EL84-R Duet GT-6L6GE Single GT-EL84-R Quartet GT-6L6-R (B) Duet GT-EL84-R Single GT-6L6-R (B) Quartet GT-EL84-S Duet GT-6L6-R (B) Single GT-EL84-S Quartet GT-6L6-S Duet GT-EL84-S Single GT-6L6-S Quartet ST-EL84-R Silver Series single tube GT-6L6-S Single ST-EL84-S Silver Series single tube GT-KT66-C Duet Other GT-KT66-C Quartet GT-7027-S Duet GT-KT66-C Single GT-7027-S Quartet ST-6L6-C Silver Series single tube GT-7027-S Single ST-6L6-R (B) Silver Series single tube GT-7591A-R Duet ST-6L6-S Silver Series single tube GT-7591A-R Quartet ST-KT66-C Silver Series single tube GT-7591A-R Single EL34 Family ST-7027-S Silver Series single tube GT-E34LS Duet ST-7591-R Silver Series single tube GT-E34LS Quartet   GT-E34LS Single Rectifiers GT-EL34M Duet XF2 Dual Getter GT-5U4R GT-EL34M Quartet XF2 Dual Getter GT-5Y3 GT-EL34R Quartet GT-6CA4 GT-EL34R Duet   GT-KT77S Duet   GT-KT77S Quartet   ST-E34L-S Silver Series single tube   ST-E34L-S Silver Series single tube   ST-EL34-R Silver Series single tube