(!!!!) (Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 test like new faded printing (2.5/2.2ma and 2.4/2.8ma)

1 low noise pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 test like new faded printing in white boxes

1 tube) 2.5/2.2ma Gm=1600/1400

1 tube) 2.4/2.8ma Gm=1500/1600

Matched on Amplitrex 

Vplate=250V

Vgrid=-4V

Good used mA range = 2 - 2.5ma

Good used Gm range = 1300-1500

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