56 National Union used/good 1940's (5.9ma)
$ 8.99
56 National Union used/good 1940's
5.9ma
Gm=1400
Tested on Amplitrex:
Vplate=250V
Vgrid=-13.5V
Iplate good range = 4.5-5.5ma
Good used Gm=1200-1300
(Vfilament = 2.5 volts)See more: vacuum tube
Share:
&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_c9b6d8f9-a79b-43e3-bf31-4027a8e33f1a.jpg?v=1571439164){kind=link}
 "Pin It")