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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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