00975nam a22002291a 450000100060000000300080000600500170001400800410003103500190007203500190009104000320011004100080014208200290015010000170017924502670019626001020046330000360056549000770060150400300067865000180070870000190072666868BD-RjUL20211209081603.0170321s1949    xx       b    001 0 eng    a(BD-RjUL)66999  a(OCoLC)1117192  aDLCcNhDdDLCdBD-RjULbeng  aeng  a621.384132223bDEF 19491 aDeketh, Jan.10aFundamentals of radio-valve technique :ban introduction to the physical fundamentals, properties, designs and applications of radio-receiver and power-amplifier valves covering the technical development reached up to December, 1947 /cTranslated by F.G. Garratt  aEindhoven,bN.V. Philips' Gloeilampenfabrieken, Technical and Scientific Literature Dept.,c1949.  a022, 535 p. :billus. ;c24 cm.1 aPhilips' technical library. Series of books on electronic valves, book 1  aBibliography: p. 513-521. 0aVacuum-tubes.  aGarratt, F.G.