(!) 203A Sylvania brass base tests like new 1930's
By Tube World
$ 299.99
203A Sylvania brass base tests like new 1930's large getter very good condition reboxed
NOT A PAIR
203A = 211 with Higher Mu
203A Mu=25
211 Mu = 12.5
See more: vacuum tube
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 203A Sylvania brass base tests like new 1930's "Pin It")