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(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)
(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)
$ 299.99
1 matched pair) 309A Western Electric NOS 1960 original boxes - large punch plate
1 tube) 4.8ma Gm=1100
1 tube) 5.1ma Gm=1100
Matched on Amplitrex
Vplate=180V
Vscreen=75V
Vgrid=-1.5V
Good Ma = 4.5-4.8ma
Good Gm = 1000-1100
General Info
- Variable-Mu Pentode
- Very low noise
- 5 pin base
Vfil=10V @ 320ma
Vplate=180V
Gm=1100
See more: vacuum tube
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 (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/309a1.jpg?v=1571438797){kind=link}
 (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm) "Pin It")