The Varian CPI VZC6963G5 is a high-power traveling wave tube (TWT) amplifier engineered for RF signal amplification across the 4 GHz to 8 GHz band. Delivering 200 Watts of continuous wave (CW) output, this legacy Varian Associates product—now part of Communications & Power Industries—serves demanding industrial, scientific, and defense applications requiring stable, high-power microwave amplification.
Technical Specifications
Frequency Range: 4 GHz to 8 GHz
Power Output: 200 Watts CW
RF Connection: Waveguide
Cooling System: Forced air with integral blower
Operating Altitude: Up to 10,000 ft (standard adiabatic derating)
Acoustic Noise: Approximately 68 dBA (at 3 ft)
– Key Features
• Compact form factor suitable for integration into rack-mount systems
• Forced-air cooling eliminates external cooling infrastructure requirements
• Withstands 20G peak acceleration at 11 ms (1/2 sine pulse) in non-operating condition per MIL-STD-810E Section 514.4
• Microprocessor-based monitoring and control architecture
• IEEE 488 bus controllability for automated test environment (ATE) integration
• Waveguide RF output for minimal transmission loss and high efficiency
– Typical Applications
• Industrial microwave heating and drying processes
• Radar system development and validation
• Electromagnetic interference and compatibility (EMI/EMC) testing
• RF and microwave exposure testing for product qualification
• Scientific instrumentation requiring stable, high-power RF output
• Material analysis and materials characterization testing
– Compatibility & Integration
The VZC6963G5 integrates into automated measurement systems via IEEE 488 bus control. Waveguide-based RF architecture ensures compatibility with standard broadband microwave test systems operating in the X-band frequency range. Standard transportation shock and vibration design permits portable deployment across operational sites.

















