(!) (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (37ma and 40ma)
$ 19.99
1 pair) 12HG7=12GN7A Sylvania branded RCA coated glass NOS 1970's
1 tube) 37ma Gm=29,000
1 tube) 40ma Gm=30,000
(12HG7=ruggedized frame-grid version of 12BY7A, uprated to 10 watts)
Pentode
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 (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (37ma and 40ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/12hg7syl_95a02ce7-175d-459f-acec-c6f936a015e2.jpg?v=1571439043){kind=link}
 (PAIR) 12HG7=12GN7A Sylvania branded RCA coated glass NOS (37ma and 40ma) "Pin It")