(!!!) (Best Single) 5670 RCA NOS 1970 (13/10.6ma) (Highest mA and Gm)
1 low noise tube) 5670 RCA NOS 1970 (CV)
1 section) 13ma Gm=7300
1 section) 10.6ma Gm=6400
Amplitrex Test Specs:
Vplate=150V
Vgrid=-1.9V
Good Ma = 6 - 8ma
Good Gm = 5000-5500
5670=2C51=396A=6C3P
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 (Best Single) 5670 RCA NOS 1970 (13/10.6ma) (Highest mA and Gm) "Pin It")
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