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Triotron

    
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Triotron was the brand name for one of the smaller European Independents based, possibly, in Austria.

During the mid and later 1920s they made and marketed a whole range of cut-price valves, achieving a significant market penetration in the UK. By the later 1930s they had settled down to copying the common European domestic valves of the day. Their later valves look rather Philips-like and we suspect Philips may have part-owned Triotron.

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