(!!!) (Pair) UX-226 RCA Radiotron balloon used/good 1930 era (3.9ma and 3.6ma)
$ 35.99
1 pair) UX-226 RCA Radiotron balloon used/good 1930 era - same build
1 tube) 3.9ma Gm=800 slightly taller bottle
1 tube) 3.6ma Gm=900
See more: vacuum tube
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 (Pair) UX-226 RCA Radiotron balloon used/good 1930 era (3.9ma and 3.6ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/3_8fa3beb4-6087-490c-bdda-38f4c865b876.jpg?v=1774369312){kind=link}
 (Pair) UX-226 RCA Radiotron balloon used/good 1930 era (3.9ma and 3.6ma) "Pin It")