Beam Power Audio Amplifier.
Including fan favorites audio tube which is rarely available in the market. maybe most people just stored / collected ....
obtained by the author with NOS condition ..
http://www.hifitubes.nl/weblog/index.php/sylvania-6l6g-datasheet/
6L6, EL37 High-powered beam tetrode. There are several variations. Except for types 6L6-GC and 6L6-GX, all have the same maximum output ratings—11.5 watts (single-ended Class A circuit); 14.5 watts (push-pull Class A circuit); 34 watts (push-pull Class AB1; 60 watts (push-pull Class AB2 circuit). Types 6L6 and 25L6 were introduced in 1935 as the first beam tetrodes. Both types were branded with the L6 ending to signify their (then) uniqueness among audio output tubes. However, this is the only similarity between the two tubes. (Type 6W6-GT is the 6.3 volt heater version of types 25L6-GT and 50L6-GT.)
- 6L6 (metal envelope) and 6L6-G (shouldered glass envelope) were used in pre-World War II radios and Public Address amplifiers.
- 6L6-GA Post-war version of type 6L6-G, in smaller ST-14 shape.
- 6L6-GB Post-war improved version in a cylindrical glass envelope. Similar to type 5881.
- 6L6-WGB "Industrial" version of type 6L6-GB.
- 6L6-GC Final and highest-powered audio version of the tube. Max. outputs—32 watts (single-ended Class A circuit); 17.5 watts (push-pull Class A circuit); 55 watts (push-pull Class AB1 circuit); 60 watts (push-pull Class AB2 circuit)
- 6L6-GX Class C oscillator/amplifier used in transmitters. Max. output—30 watts. (All versions may be used as a Class C oscillator/amplifier, but this version is specifically designed for this purpose, has a special ceramic base.)
