This tube was mainly used for the AEG/Telefunken Magnetophone production, but evolved into much of the professional studio equipment of the time. First the V72 was re-equipped with this state of the art Telefunken EF804S audio tube made in their Berlin and Ulm production. This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes.Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics. You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en] 6CG7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Michael Schlör The tube is still used today in high end audio equipment. The 6SN7 is larger and more rugged than the miniature dual triodes such as the 12AU7 and the 6CG7. It has a higher plate dissipation, but is also larger and has a bigger footprint, which is why it lost ground and was eventually replaced in most applications by the smaller miniature tubes.
BLACK DIAMOND SERIES VACUUM TUBES TELEFUNKEN vacuum tubes have been the benchmark of excellence in all audio applications, both production and reproduction, for many decades. Today, this rich history continues with the introduction of new production tubes from TELEFUNKEN Elektroakustik, in partnership with JJ Tubes from the Carpathian Mountains ... Besides data sheets on individual tubes, they also contain chapters on the theory of vacuum tubes, the care and feeding of vacuum tubes, suggested circuits, and application guidelines. The application guidelines are particularly helpful in finding a tube for a specific application. 6FQ7 / 6CG7 US Brands and Australian (a 6FQ7/6CG7 is electrically similar to a 6SN7GT, but a 6FQ7/6CG7 has 9 pins versus 8 for a 6SN7GT) (Vfil=6.3V @ 600ma) (most 6CG7 have INTERNAL ELECTROSTATIC SHIELD between the plates, the 6FQ7 does not have this shield) The 6AS7G tube is best known for being the used in Atma-Sphere OTL Tube amplifiers. The Music Amplifier MA-3 uses 42 6AS7 tubes per channel! The 6AS7-G tube is also a nice choice for many OTL headphone amps such as the Woo Audio 2, 3, and 22 models. View the 6H13C tube data sheet.