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.
Designed for use in video amplifiers in TV receivers. MFR: Zenith, Raytheon, Realistic, Dumont SKU: 12GN7 New old stock * No longer available for export.
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.