What are RSD tubes?

RSD stands for Röhren Schnell Dienst. In 1951, its inventor Germa Weiss from Frankfurt established it as a brand based on a marketing idea. RSD tubes have been found for decades all over the world in radios, tube amplifiers, historic televisions, radio equipment and all kinds of tube devices. RSD tubes offer a very good price-performance ratio; they are double-tested, come with a 6-month warranty from the brand owner BTB Elektronik, and are very reliable. In earlier days, these tubes mostly came from the GDR, as Germa Weiss, later Gert Müller, were the only importers of these tubes and held the license for Eastern tubes for “brown goods” in the West. Later, Tesla, Ei, Polamp, Tungsram, Russian and Western tubes were also used for RSD tubes.