3-Tube KW traveling-wave tube amplifier chains for C band and X band

Small diameter metal envelope traveling-wave tubes for use in 1-kw amplifier chains have been developed for operation in the shf band. Tbe tubes utilize a mechanical structure that incorporates the rf helix connectors in the metal envelope. The metal envelope is reduced in size comparable to glass envelope tubes. The detailed mechanical structure and the assembly techniques for small production quantities is described. Data on the influence of the integral rf connectors, the loss pattern, and the helix support rods on broad-band performance will be shown. A comparison of the performance with tubes of more conventional construction is made showing the resultant savings in tube and solenoid size, weight, and power.