copy of Haltron ECL805 SQ TRIODE-PENTODE

copy of Haltron ECL805 SQ TRIODE-PENTODE

Valvo started as Radio-Roehren-Fabrik GmbH (RRF GmbH) in 1924 as the vacuum tube manufacturing arm of C.H.F. Mueller GmbH which only produced X-ray tubes. The company was renamed Valvo in 1926. Phillips bought C.H.F. Mueller in 1927 and Valvo in 1932. The company was split in the 1980s and sold in 1999.

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€ 12.50
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