Regeltransformatoren / Philips Nederland Automatic potentiometers for measuring, controlling and recording in industry and laboratories / Philips Cathode-ray oscilloscopes and video test instruments / Tektronix Trillingsmeetapparaten / Philips' gloeilampenfabrieken, afd. industriele meet- en regelapparaten UHF tubes communication and measuring equipment : technical documentation of Philips U.H.F. tubes DC 80 - EC 80 - EC 81 - EC 55 / … Marconi instruments 1954 : a cataloque of the telecommunication measurement equipment and industrial electronic instruments / Marconi Instruments list Fixed and semi-adjustable resistors / British Electric Resistance Co (BERCO) list Rotary type rheostats and potentiometers / British Electric Resistance Co (BERCO) Defence electronics : sensors, combat systems, display and weapon control systems for Navy, Army and Air Force applications / Hollandse Signaalapparaten
