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(!!!!) (Best Pair) 6CB5A RCA NOS same date codes (90ma and 92ma)

(!!!!) (Best Pair) 6CB5A RCA NOS same date codes (90ma and 92ma)

$ 61.99

1 pair) 6CB5A RCA NOS same date codes 1973 (ED)

1 tube) 92ma Gm=8200

1 tube) 90ma Gm=7900

 

 

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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