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(!!) (Recommended Pair) 6HF5 Sylvania NOS 1960's (93ma and 97ma)

(!!) (Recommended Pair) 6HF5 Sylvania NOS 1960's (93ma and 97ma)

$ 79.99

1 pair) 6HF5 Sylvania NOS 1960's same build

1 tube) 93ma Gm=9300 Sylvania

1 tube) 97ma Gm=9450 Sylvania branded Philco

 

 

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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