General purpose medium-mu triode. It is useful for service as an oscillator or audio-frequency amplifier. MFR: RCA SKU: 12J5 New old stock * No longer available for export.
Designed to be used in a feedback stabilized vertical deflection amplifier. MFR: RCA, GE, Amperex SKU: 12JQ6 New old stock * No longer available for export.
Miniature space-charge-grid tetrode intended for use as a driver for the transistor power-output stage of automobile radio receivers. MFR: Raytheon, RCA, Zenith, CBS SKU: 12K5 New old stock * No longer available for export.
Designed to be used as a triode oscillator and hexode mixer in a superheterodyne amplifier. MFR: RCA, Kenrad SKU: 12K8 New old stock * No longer available for export.