1AD4

1.4V @ 0.05A Filament Drive Rail, Normally Open/Normally Closed Contact Logic Not Applicable, Sharp-Cutoff RF Pentode Vacuum Tube. It provides excellent small-signal voltage amplification and stable local oscillator mixing loops across legacy tactical telemetry decks, entirely shunting ambient background interference and structural microphonics under continuous operational workloads, housed in a standard 7-pin miniature glass tube layout. Exact part index: 1AD4. [1]