DEVELOPMENT OF LINEAR POWER TUBES.
Interim development rept., 17 Nov 66-16 Feb 67,
EIMAC SAN CARLOS CALIF
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Two Phase I 200 - 500 watts PEP output UHF tetrodes were made and tested at full power output. Third and fifth order intermodulation distortion product ratios were -40 db or better at more than fifty per cent plate circuit efficiency. Distortion calculations from the grid-plate transfer curves showed that the optimum for minimum distortion zero signal plate current was above the desirable level. Experimental Phase I tubes designed to operate at lower zero signal plate current and higher plate efficiency are under construction. Tests of an EIMAC linear tetrode, the 4CX1500B, showed that the linearity of this type is strongly dependent on the quiescent plate current and, to a lesser extent, on the screen grid voltage. Author
- Electrical and Electronic Equipment