Eimac 3CX1500A7 / 8877 Power Triode

The product shown is a high-power ceramic-metal triode, specifically identified as an Eimac 3CX1500A7 (also known as the 8877). This vacuum tube is widely regarded as a 'gold standard' in the amateur radio and industrial community for its high gain and linearity in RF power amplification.

Originally developed by Eimac (Eitel-McCullough, Inc.) in the United States, the brand became a division of Varian Associates in the 1960s. The manufacturing has historically focused in California, USA, though global supply chains and subsequent corporate mergers have seen these components integrated into various international telecommunications systems. The 8877 is praised for its robust construction, featuring a massive cooling anode and ceramic insulation that allows it to operate under high temperatures and voltages.

Today, the Eimac brand is owned by Communications & Power Industries (CPI), which continues to support these legacy products for critical infrastructure, medical imaging, and scientific research. CPI remains headquartered in the United States, maintaining the brand's long-standing heritage in high-end electronic component engineering.