6SN7 is a dual triode vacuum tube, on an 8 pin octal base. Although the 6S-- series tubes are often metal cased, the 6SN7 is generally found only in a glass GT size envelope. The 6SN7 number may have been chosen because most of the 6S-7 series were single ended versions of tubes that had grid caps, and there already was a corresponding metal-cased dual triode called the 6N7. Diagram of Vacuum-Tube Triode A triode is a type of vacuum tube (or valve in British English) with three elements: the filament or cathode, the grid, and the plate or anode. ... In electronics, a vacuum tube (American English) or (thermionic) valve (British English) is a device generally used to amplify a signal. ... Octal base has two possible meanings: a type of vacuum tube socket the octal numeral system, or base 8. ... Diagram of Vacuum-Tube Triode A triode is a type of vacuum tube (or valve in British English) with three elements: the filament or cathode, the grid, and the plate or anode. ...

6SN7 vacuum tube dual triode (1980s manufacture)

Originally released in 1939 and registered in 1941 as the 6SN7GT, during World War II a 6SN7A (also called 6SN7W) version was made with closely-controlled characteristics for military use. The 6SN7GT was essentially two 6J5 triodes in the same envelope. Like the 6J5, the plate dissipation was 2.5 watts maximum. 6SN7WGTB vacuum tube, made by Philips 1980s, photo by Eric Barbour This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... 6SN7WGTB vacuum tube, made by Philips 1980s, photo by Eric Barbour This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... 1939 was a common year starting on Sunday (link will take you to calendar). ... 1941 was a common year starting on Wednesday (link will take you to calendar). ... World War II was a truly global conflict with many facets: Immense human sacrifice, fierce indoctrinations, and the use of new, extremely devastating weapons - the atom bomb being the ultimate. ... Diagram of Vacuum-Tube Triode A triode is a type of vacuum tube (or valve in British English) with three elements: the filament or cathode, the grid, and the plate or anode. ...

Upgraded versions GTA (General Electric, 1950) and GTB (GE, 1954) versions were made later. The 6SN7GTA has anode dissipation uprated to 5.0 watts "design center rating". The 6SN7GTB is identical to the 6SN7GTA except for a controlled heater warmup time, for use in Television sets with 600ma series heater strings. At the time GE said that the GTB was a suitable replacement for all 6SN7GT and 6SN7GTA applications. The General Electric Company, or GE, (NYSE: GE) is a multinational technology and services company. ... 1954 was a common year starting on Friday of the Gregorian calendar. ... An anode (from the Greek άνοδος = going up) is the positive electrode in an electrolytic system or circuit. ... In a general sense, a series is a related set of things that occur one after the other or are otherwise connected one after the other. ...

The 12 volt filament equivalent is the 12SN7GT or 12SN7GTA. (12.6V 300ma filament) There was also a comparatively rare 8SN7 (8.4V@450mA filament intended for 450ma series string TV sets)

Numerous other variations on the 6SN7 type have been offered over the years, including 7N7 (Sylvania 1940, loktal-base version), 5692 (RCA 1948, a super-premium version with guaranteed 10,000 hour lifetime), 12SX7 (RCA 1946, intended for use in 26-volt aircraft electronics), 1633 (RCA 1941, also for 26-v radios), 6042 (1951, another 1633 type), and 6180 (1952). American military designator for the 6SN7GA was VT-231, and the British called it CV1986 or CV1988. European designators include ECC32, 13D2 and B65. Each of the giant SAGE computer systems used hundreds of 5692s as flip-flops. 1940 was a leap year starting on Monday (link will take you to calendar). ... 1948 is a leap year starting on Thursday (link will take you to calendar). ... 1946 was a common year starting on Tuesday. ... 1951 was a common year starting on Monday; see its calendar. ... 1952 was a leap year starting on Tuesday (link will take you to calendar). ... Species see List of Salvia species Sage is a term used for plants of the genus Salvia of the mint family, Lamiaceae. ... This article is about the electronic component. ...

While often used as an audio amplifier in the 1940-1955 period, usually in the driver stages of power amps, the 6SN7 was also very popular in television vertical sweep applications. The designer of the famous Williamson amplifier, one of the first true high-fidelity designs, suggested use of the 6SN7 since it was similar to the British triodes that he used in his circuit. In most late-1950s applications it was replaced by the 12AU7, then by transistors in the 1960s. Starting in 1947, the British magazine Wireless World published a series of articles by D.T.N. Williamson, under the title Design for a High-quality Amplifier. ... Through hole transistors (tape measure marked in centimeters) The transistor is a solid state semiconductor device which can be used for amplification, switching, voltage stabilization, signal modulation and many other functions. ...

6SN7s are still manufactured in Russia and China under the old Soviet designator 6N8S, and continue to be used in some modern tube high-fidelity equipment.

The 6CG7 is a miniature tube (RCA, 1951) that has very similar ratings. It was also made as a 8.4V 450ma series string type as the 8CG7

References

http://tubecollectors.org/ The Tube Collectors Association

http://www.mif.pg.gda.pl/homepages/frank/sheets/082/6/6SN7.pdf Datasheet on the 6SN7

RCA Receiving Tube Manual, RC-14, Harrison NJ, 1940 RCA receiving Tube Manual, RC-29, harrison NJ, 1973 RCA, formerly an initialism for the Radio Corporation of America, is now a trademark used by two companies for products descended from that common ancestor: Thomson SA, which manufactures consumer electronics like RCA-branded televisions, DVD players, video cassette recorders, direct broadcast satellite decoders, camcorders, audio equipment, telephones, and related...

Sylvania Technical Manual 14th edition (reprint), 2000 Sylvania literally means forest land. Ít is used to mean several different things: Sylvania is the name of several places in the United States of America: Sylvania, Alabama Sylvania, Georgia Sylvania, Ohio Sylvania is also the name of a company manufacturing electrical devices; once a subsidiary of General Telephone and...

GE Techni-Talk, Volume 6 number 5, October-November 1954

http://www.mif.pg.gda.pl/homepages/frank/sheets/093/6/6CG7.pdf Datasheet on the 6CG7