(1 PAIR) 408A Western Electric used/tests like new 1965-1966 (91/60 and 97/60)
$ 41.99
1 pair) 408A Western Electric used/tests like new 1965-1966
1 tube) 91/60 (1966)
1 tube) 97/60 (1965)
Tested on B&K
above 70 is good
20V Filament
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See more: vacuum tube