Now have pair new 3B28,new 4D32, ten NOS OC3A/VR105, and following NOS used as substitutes for 6000 driver in T368 pair each 25AV5, 12AV5, 6 AV5 last two would require providing different filament voltage as originally T368 has 24 volts on heater as we all know . Any offers for any of above. John, W7KPB