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Originally founded in 1986 by Dr. Klaus Schaffernicht in Lüneburg, Germany, ELROG emerged from the expertise of a former Telefunken employee who dedicated 18 years to tube technology before establishing his own company in 1980. After ELROG faced insolvency in 2016, all assets, production machines, brand name, and know-how were acquired by Deutsche Elektronenröhren Manufaktur GmbH, founded by tube amplifier designer Thomas Mayer in August 2016. Based in Lindau, Germany, with production continuing at the original location in Hagenow, Mecklenburg-Vorpommern, ELROG represents probably the last manufacturer of audio vacuum tubes in Germany. Under CEO Thomas Mayer's leadership, the company specializes in high-end audio amplifiers and innovative vacuum tubes including the flagship ER 211, ER 845, and ER 300B power triodes that have reached series production maturity. Distinguished by proprietary innovations such as graphite plates milled from solid blocks, improved 80W plate dissipation ratings, and thoriated tungsten filaments characteristic of transmitting tubes, ELROG tubes represent superior alternatives to vintage General Electric and RCA designs. The company operates as a boutique manufacturer building amplifiers to order while maintaining the legacy of German tube manufacturing excellence through Thomas Mayer's VinylSavor blog and direct customer engagement, serving the high-end audio community with hand-crafted vacuum tube solutions that combine historical craftsmanship with modern engineering innovations.