Amperex 221 XM triode
Inventory NumberVT1637
ClassificationVacuum Tube
Maker
Amperex Electronic Corporation
founded in 1920s
Cultural Region
Place of Origin
Dimensions23.5 × 7.3 × 7.3 cm (9 1/4 × 2 7/8 × 2 7/8 in.)
DescriptionSC 535-A
Amperex Electronic Corporation
Date: circa 1960
Object number: VT1619
Amperex Electronic Corporation
Date: circa 1955
Object number: VT1117
Amperex Electronic Corporation
Date: circa 1956
Object number: VT1261
Amperex Electronic Corporation
Date: circa 1955
Object number: VT1620
Amperex Electronic Corporation
Date: circa 1960
Object number: VT1641
