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(!!) (Best Single) UY-227 RCA Radiotron Balloon tests like new 1930 era (10.2ma)

(!!) (Best Single) UY-227 RCA Radiotron Balloon tests like new 1930 era (10.2ma)

By Tube World

$ 39.99

UY-227 RCA Radiotron Balloon tests like new and like new condition 1930 era, fine mesh-plate in WB

10.2ma

Gm=900

 

Tested on Amplitrex

Vplate=250V

Vgriod=-21V

NOS Ma = 4.6-5ma

NOS Gm=900

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