(!!!) (PAIR) 6HF5 Sylvania NOS 1970's (96ma and 97ma)
$ 74.99
1 pair) 6HF5 Sylvania NOS 1970's - same plate shape - slightly different internals
1 tube) 96ma Gm=10,600
1 tube) 97ma Gm=9800 larger heat sink attached to plate - faded printing
Tested on Amplitrex
Vplate=175V
Vscreen=125V
Vgrid=-25V
Good Ma range 90-125ma
Good Gm = 9,000 - 11,000
- Diathermy machine built by Mettler Electronics
See more: vacuum tube
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 (PAIR) 6HF5 Sylvania NOS 1970's (96ma and 97ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_58888a25-a924-42cd-90ec-4bd5c14daab9.jpg?v=1692371332){kind=link}
 (PAIR) 6HF5 Sylvania NOS 1970's (96ma and 97ma) "Pin It")