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(!!) (Best Overall Single) 407A Western Electric NOS 1963 (53/26 and 53/26) 1-2% section balance
(!!) (Best Overall Single) 407A Western Electric NOS 1963 (53/26 and 53/26) 1-2% section balance
$ 44.44
407A Western Electric D getter NOS 1963 (53/26 and 53/26) 1-2% section balance
(407A=396A with a 20V filament)
(407B=premium grade 407A with higher Gm and higher plate current specs, 20V Filament)
See more: vacuum tube
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 (Best Overall Single) 407A Western Electric NOS 1963 (53/26 and 53/26) 1-2% section balance&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_ababa4d3-af62-4050-9dbb-eaf719ba9025.jpg?v=1763505803){kind=link}
 (Best Overall Single) 407A Western Electric NOS 1963 (53/26 and 53/26) 1-2% section balance "Pin It")