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(!!!!) (Recommended Pair) 6HF5 GE NOS 1966 and 1979 (123ma and 131ma) (Diathermy machine by Mettler Electronics)
(!!!!) (Recommended Pair) 6HF5 GE NOS 1966 and 1979 (123ma and 131ma) (Diathermy machine by Mettler Electronics)
$ 79.99
1 pair) 6HF5 GE NOS
1 tube) 123ma Gm=10,600 (1979) extra vent holes in plate
1 tube) 131ma Gm=10,600 (1966)
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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 (Recommended Pair) 6HF5 GE NOS 1966 and 1979 (123ma and 131ma) (Diathermy machine by Mettler Electronics)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/1_3288c58e-6048-4d87-b5a5-f9df82a275a8.jpg?v=1603119044){kind=link}
 (Recommended Pair) 6HF5 GE NOS 1966 and 1979 (123ma and 131ma) (Diathermy machine by Mettler Electronics) "Pin It")