(!!!) (BEST PAIR) 6HB5 Sylvania NOS (90ma and 89ma) (same Gm)
$ 48.99
1 pair) 6HB5 Sylvania NOS same build
1 tube) 90ma Gm=12,000
1 tube) 89ma Gm=12,000 Sylvania branded RCA
See more: vacuum tube
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 (BEST PAIR) 6HB5 Sylvania NOS (90ma and 89ma) (same Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_a57b0563-6f0a-4976-9be6-c8678aad29a4.jpg?v=1753824513){kind=link}
 (BEST PAIR) 6HB5 Sylvania NOS (90ma and 89ma) (same Gm) "Pin It")