(!!) UY-227 RCA Radiotron Balloon used/good 1930 era (3.7ma)
$ 16.99
UY-227 RCA Radiotron Balloon used/good 1930 era
3.7ma
Gm=800
Tested on Amplitrex
Vplate=250V
Vgriod=-21V
NOS Ma = 4.6-5ma
NOS Gm=900
See more: vacuum tube
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 UY-227 RCA Radiotron Balloon used/good 1930 era (3.7ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_fa7da7f0-b1dc-431e-b2bf-5b1129cab246.jpg?v=1571439279){kind=link}
 UY-227 RCA Radiotron Balloon used/good 1930 era (3.7ma) "Pin It")