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(1 Pair) 31 RCA/Cunningham NOS 1930's - 1940's (12.0ma and 13.2ma) (Same Gm)
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(1 Pair) 31 RCA/Cunningham NOS 1930's - 1940's (12.0ma and 13.2ma) (Same Gm)
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(1 Pair) 31 RCA/Cunningham NOS 1930's - 1940's (12.0ma and 13.2ma) (Same Gm)1 pair) 31 RCA Cunningham NOS 1930's 1940's 1 tube) 12. 0ma and Gm=1100 RCA Cunningham engraved base 1 tube) 13. 2ma and Gm=1100 RCA red print taller bottle Tested on Amplitrex Vplate=180V Vgrid= 30V Good NOS Ma = 11 12ma Good Gm = 1000
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1 pair) 31 RCA/Cunningham NOS 1930's - 1940's
1 tube) 12.0ma and Gm=1100 RCA/Cunningham engraved base
1 tube) 13.2ma and Gm=1100 RCA red print taller bottle
Tested on Amplitrex
Vplate=180V
Vgrid=-30V
Good NOS Ma = 11 -12ma
Good Gm = 1000
(1 Pair) 31 RCA/Cunningham NOS 1930's - 1940's (12.0ma and 13.2ma) (Same Gm)
Item no
:
67078265160
US$ 34.99
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Min. order:
1piece
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 1 - Jul 6
US$40
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