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(!) 47 RCA Radiotron Balloon used/good 1930's (23.4ma)

By Tube World

$ 29.99

1 tube) 47 RCA Radiotron Balloon used/good 1930's

23.4ma

Gm=1900

 

 

Vplate=250V

Vscreen=250V

Vgrid=-15V

NOS Iplate=27ma

NOS Gm=2350

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