ULTRA RARE
50 ST-19 Shape RCA Cunningham Radiotron
Engraved Base, Foil Getter,
Excellent Condition
Made in United States
New In Original Box, (unused)
Tested Advance Digital Tube Tester Amplitrex AT1000
Sr.No.911001 T1=Ia=56.2ma Gm=2300
Sr.No.909001 T1=Ia=56.0ma Gm=2280
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