Tube is designed to be used as a grounded grid mixer or amplifier in TV receivers that operate at high frequency. Works with VHF-UHF frequencies MFR:RCA Ge Raytheon Tung-Sol Sylvania, Motorola SKU: 6AM4 New old stock no longer available for export
MFR:RCA, GE, Brimar, CEI, Sylvania Brimar and CEI were produced in England All other brands are US produced SKU: 6AM8A New old stock * No longer available for export