(!!!) (Recommended Single) ER-230=30 Raytheon 1930's used/like new (4.1ma and Gm=800)
By Tube World
$ 34.99
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ER-230=30 Raytheon 1930's used/like new
4.1ma
Gm=800
Tested on Amplitrex
NOS Ma = 3.1ma
NOS Gm = 800-900
See more: vacuum tube
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 (Recommended Single) ER-230=30 Raytheon 1930's used/like new (4.1ma and Gm=800)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_6b88f509-78b9-45fe-81a7-796ff7db8f73.jpg?v=1657663095){kind=link}
 (Recommended Single) ER-230=30 Raytheon 1930's used/like new (4.1ma and Gm=800) "Pin It")