(!!!!!) (Best Single) E188CC=7308 Siemens Halske Germany NOS 1968 (12.6/15.3ma) (very low noise) (mic grade) (rare)
1 ultra-low noise tube) E188CC=7308 Siemens Halske Germany NOS gold pins "O" getter 1968
12.6ma Gm=11,800
15.3ma Gm=13,200
Tested on Amplitrex
Vplate=90V
Vgrid=-1.2V
Good Ma range 12-15ma
Good Gm range 11,000 - 12,500
Recommended for:
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 (Best Single) E188CC=7308 Siemens Halske Germany NOS 1968 (12.6/15.3ma) (very low noise) (mic grade) (rare)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shopifycloud/shopify/assets/no-image-2048-5e88c1b20e087fb7bbe9a3771824e743c244f437e4f8ba93bbf7b11b53f7824c.gif){kind=link}
 (Best Single) E188CC=7308 Siemens Halske Germany NOS 1968 (12.6/15.3ma) (very low noise) (mic grade) (rare) "Pin It")