(!!) UY-227 RCA Radiotron Balloon used/good 1930 era (4.0ma)
$ 22.99
UY-227 RCA Radiotron Balloon used/good 1930 era
4.0ma
Gm=800
Tested on Amplitrex
Vplate=250V
Vgriod=-21V
NOS Ma = 4.6-5ma
NOS Gm=900
See more: vacuum tube
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