amplifier thermionic technical data vacuum tube valve tube valvedata mullard component conductor radio design electronic pa semiconductor a.m.ball electronic valve instrument transistor data radio valve manual brimar 1970 vacuum output power pentode triode chelmer electronic valves wireless audio signal vacuum tubes vintage wireless low noise rsgb 12au7 ecc82 circuit examples radio society great britain radio communication handbook radio society design requirements transistor marconi n709 el84 6ca7 el34 z729 ef86 ecc83 12ax7 low mu 12at7 ecc81 jd7 direct inject radio communication circuit diagrams design characteristics valve and transistor data maintenance manual computer aided design public address system paraphase amplifier cad design examples phase splitter qcad power amplifier circuit recommendations operating conditions mullard technical handbook operational recommendations operating conditions 5th edition 4th edition purpose musical instruments mullard outlook special purpose amplifiers public address systems sheet valve equivalents 1974 babani equivalents 1446 836 consumer electronics capacitor mullard maintenance manual 1961 marconi valves 6bq5 push pull 6f22 hi fi ecl86 low microphony
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