C-BAND AND X-BAND DUAL FUNCTION OSCILLATORS.
Quarterly rept. no. 4, 1 Mar-31 May 67,
GENERAL ELECTRIC CO OWENSBORO KY TUBE DEPT
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The triode development phase has continued with major effort now being directed toward X-band operation. The bonded heater-cathode structure is being used exclusively for current investigations. Grid structures still being studied are an interlaced crosswire design and a photoetched support frame design. C-band performance with good power output, I-f frequency, and tuning range has been demonstrated using tubes incorporating the latter named grid structure. This design also provided a clean spectrum with very low frequency modulation. Electrical tests on Oscillator DC-55 were made with very good results. Cross checks between Oscillator DC-55 and Oscillator DC-51 revealed no significant differences. Another oscillator Oscillator DC-56 was designed and built for the rapid evaluation of tubes. Oscillator DC-56 features spring and finger contacts to the tube in order to facilitate rapid insertion and removal of the tube from the circuit. In the electrical tests of Oscillator DC-55, those tubes which showed little output on the grid excitation test, produced negligible frequency modulation of the r-f output. A check of the effect of load impedance variations was made by introducing a VSWR of 1.51 and varying it through all phases. Author
- Electrical and Electronic Equipment