Philips / PC900/4HA5/PHILIPS

PC900/4HA5/PHILIPS Click on image(s) above to view larger
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Philips was founded by Frederik Philips and his son Gerard Philips in 1891 in Eindhoven in Holland. They concentrated on mass production of incandescent lamps. By the end of the 1890s Philips & Co. is one of the largest producers in the Netherlands and, with 1,000 employees, the country’s largest industrial employer. In 1928 Philips bought Mullard after a joint venture in vacuum tubes. Philips had been one of main originators with in the musical field. They invented the compact cassette and CD discs and also some of the great valve designs such as the EL34 and EL84.
The PC900 is a miniature VHF amplifier triode for use as an RF amplifier in television receivers. This was used in audio by the Italian high end Graaf amplifiers.

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