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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
Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
US$40
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