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DUAL MODE OPERATION OF A HIGH POWER, PPM-FOCUSED TWT.HAMAK BJ; HECHTEL JR.1975; IN: INT. ELECTRON DEVICES MEET.; WASHINGTON, D.C.; 1975; NEW YORK; INST. ELECTR. ELECTRON. ENG.; DA. 1975; PP. 138-141; BIBL. 1 REF.Conference Paper