(!) NY-247=47 National Union Balloon used/good 1930's (22.6ma) (and strong Gm)
By Tube World
$ 34.99
NY-247=47 National Union Balloon used/good 1930's in WB
22.6ma
Gm=2280
Vplate=250V
Vscreen=250V
Vgrid=-15V
NOS Iplate=27ma
NOS Gm=2350
See more: vacuum tube
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 NY-247=47 National Union Balloon used/good 1930's (22.6ma) (and strong Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_3f6427a0-e4fc-43cc-b817-309a2d589694.jpg?v=1694360191){kind=link}
 NY-247=47 National Union Balloon used/good 1930's (22.6ma) (and strong Gm) "Pin It")