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71A RCA Radiotron Balloon used/good 1930's (21ma)

71A RCA Radiotron Balloon used/good 1930's (21ma)

$ 52.99

71A RCA Radiotron Balloon used/good 1930's

21ma

Gm=1700

 

Tested on Amplitrex

Vplate=180V

Vgrid=-38V

Good Ma = 20ma

Good Gm = 1600-1700

See more: vacuum tube
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