(!!!!) (Recommended Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new (2.4/2.8ma and 2.5/2.6ma) 1-3% matched (same Gm)
1 low noise pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing in white boxes
1 tube) 2.4/2.8ma Gm=1500/1600
1 tube) 2.5/2.6ma 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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 (Recommended Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new (2.4/2.8ma and 2.5/2.6ma) 1-3% matched (same Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_b20aff92-0aa7-4cbe-972b-3f98d27099c4.jpg?v=1690727740){kind=link}
 (Recommended Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new (2.4/2.8ma and 2.5/2.6ma) 1-3% matched (same Gm) "Pin It")