(!!) (Best Single) 5AS4A RCA NOS 1958 (58/40 and 58/40)
$ 39.99
5AS4A RCA NOS "D" getter 1958 (LA)
58/40
58/40
5AS4A is an uprated 5U4GB
See more: vacuum tube
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 (Best Single) 5AS4A RCA NOS 1958 (58/40 and 58/40)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_a51e125d-35bf-426b-8bb6-e2c80c98c070.jpg?v=1692900705){kind=link}
 (Best Single) 5AS4A RCA NOS 1958 (58/40 and 58/40) "Pin It")