Attachment B - 4CW-25000A_Spec.pdf

This is a technical data specification sheet for the EIMAC 4CW25,000A ceramic/metal power tetrode, which appears to be related to a Department of Energy modulator tube rebuild solicitation (RFQ-457644).

The document details the technical specifications of a power tetrode intended for audio or radio frequency applications up to 110 MHz at full ratings, or 225 MHz at reduced ratings. The tube features a thoriated tungsten filament operating at 6.3V/160A, with a maximum plate voltage of 10.0 kVdc and plate dissipation of 25.0 kW. The tube requires water and forced air cooling, with specific cooling requirements provided for various dissipation levels (e.g., 2.2 GPM water flow at 10kW dissipation). The document includes detailed mechanical specifications, operating parameters for various configurations (linear amplifier, oscillator, modulator), characteristic curves, and important safety warnings regarding high voltage and X-ray radiation hazards. The tube must be operated vertically with its base up or down and uses a special SK-300A socket for proper cooling of the base seal areas.