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6B4G Ken Rad coated glass branded National Union NOS 1940's (100ma)

6B4G Ken Rad coated glass branded National Union NOS 1940's (100ma)

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1 tube) 6B4G Ken Rad coated glass branded National Union NOS black plates 1940's

100ma

Gm=6500

 

Test Data: Vplate=225V, Vgrid=-30V

(NOS Ma range 80-100ma)

(NOS Gm = 5200)

 

Recommended for

(6B4G=6.3V filament)
(6B4G is electrically equivalent to 6A3, but 6A3 has UX-4 pin base and 6B4G has 8 pin octal base)
(The best sounding 6B4G are 1940's-1950's: Ken Rad, Tungsol, Sylvania, Raytheon)

 

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