NOS NIB 5687 CALVERTRON
“D” Getter
Bottom Diamond
Copper Grid Post
Made in U.S.A
New in original box
Tested Advance Digital Tube Tester Amplitrex AT1000
Sr.No.2921001. T1=Ia=17.2ma Gm=6060
T2=Ia=12.2ma Gm=4960
Sr.No.2921002. T1=Ia=24.0ma Gm=6840
T2=Ia=15.4ma Gm=5900
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