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(sold) 50 RCA NOS ST-19 glass shape 1947 (54.5ma)

(sold) 50 RCA NOS ST-19 glass shape 1947 (54.5ma)

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50 RCA NOS ST-19 glass shape 1947

54.5ma

Gm=2250

 

Tested on Amplitrex

Vplate=440V

Vgrid=-66V

Good NOS Ma = 55-60ma

Good NOS Gm = 2100

See more: vacuum tube
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