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(!!!) (Recommended Pair) 6CB5A RCA NOS same date codes same batch (77ma and 78ma)

(!!!) (Recommended Pair) 6CB5A RCA NOS same date codes same batch (77ma and 78ma)

$ 59.99

1 pair) 6CB5A RCA NOS same date codes - same lot 1970 era

1 tube) 78ma Gm=7500

1 tube) 77ma Gm=7500

 

 

Tested on Amplitrex

Vplate=175

Vscreen=175

Vgrid=-30

Iplate = 70-100ma (Good)

Gm = 7,500 - 9,000 (Good)

See more: vacuum tube
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