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(!!) (Best Pair) 6HF5 Zenith by GE NOS and low hours/like new 1960's (125ma and 133ma) (Diathermy machine by Mettler Electronics)

$ 72.99

1 pair) 6HF5 Zenith by GE same build

1 tube) 125ma Gm=10,600 (like new)

1 tube) 133ma Gm=11,000 (NOS)

 

Tested on Amplitrex

Vplate=175V

Vscreen=125V

Vgrid=-25V

Good used Ma range = 90-100ma

Good Gm = 9,000 - 10,000

 

- Diathermy machine built by Mettler Electronics

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