The Model 277 is a dual mode Pulse/CW TWT Amplifier which has been designed to operate TWT’s up to 150 watts in the 18 to 26.5 GHz, 26.5 to 40 GHz, and 33-36 GHz frequency ranges. The RF output pulse is generated by the focus electrode (grid) pulse. CW operation may be selected by a discrete signal or by the application of +5VDC on the pulse input terminal. The RF output pulse is controlled by the input video pulse.

The High Voltage Power Supplies are modular DC-DC converter designs. The Power supply design provides superior stability for optimum TWT phase noise and spurious performance.

The modular design of the Model 277 provides convenient accessibility to all elements in the TWT amplifier. Plug-in PC boards are accessible through the front panel. The PC card cover contains a legend for PC card located test points and controls. High voltage modules are encapsulated, plug-in assemblies. There is no exposed high voltage.