(!!!) (Best Single) 5U4GB Hytron NOS "O" getter halo 1960 era (59/40 and 60/40)
By Tube World
$ 44.44
5U4GB Hytron NOS "O" getter halo 1960 era
59/40
60/40
Tested on TV-7
40=65%
60+=100+%
See more: vacuum tube
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 (Best Single) 5U4GB Hytron NOS "O" getter halo 1960 era (59/40 and 60/40) "Pin It")