(!) (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (51ma and 52ma)
$ 19.99
1 pair) 12HG7=12GN7A Sylvania branded RCA coated glass NOS 1970's
1 tube) 52ma Gm=35,000
1 tube) 51ma Gm=32,500
(12HG7=ruggedized frame-grid version of 12BY7A, uprated to 10 watts)
Pentode
See more: vacuum tube
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 (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (51ma and 52ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/12hg7syl.jpg?v=1571438928){kind=link}
 (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (51ma and 52ma) "Pin It")