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(!!!!!) (~ BEST SOUND ~) 10 RCA Cunningham Balloon engraved base NOS 1920's tube was factory sealed before removed for testing (25ma Gm=1900) (FREE SHIPPING)

$ 284.88

1 tube) 10 RCA Cunningham Balloon engraved base NOS 1920's tube was factory sealed before removed for testing, very good condition (FREE SHIPPING)

25ma

Gm=1900

 

Good curent range 20-30ma

Good Gm = 1600-1800

 

Vplate=300V

Vgrid=-15V

 

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