7199
The 7199 is a vacuum tube, combining a pentode and triode.[1] Typically, the pentode was used for the input stage, and the triode as a phase inverter.[2] The tube was used in a number of American guitar amplifiers; the Gibson Guitar Corporation, for instance, used the 7199 in 1961's Falcon for the reverb circuit.[3] Ampeg also used the 7199 extensively.[1] The 7199 has been out of production for a considerable time, and as a result is becoming increasingly rare on the market. Another tube of the same type found in far more plentiful supply is the 6U8A, which is electrically identical, but with a different pinout configuration. The 6U8A can be substituted for a 7199 with a slight modification to the wiring of its tube socket.[4]
References
- ^ a b Hopkins, Gregg; Moore, Bill (1999). Ampeg: The Story Behind the Sound. Hal Leonard. p. 281. ISBN 9780793579518. Retrieved 19 November 2013.
- ^ Linde, Rainer Zur (1995). Build Your Own AF Valve Amplifiers: Circuits for Hi-fi and Musical Instruments. Elektor International Media. p. 18. ISBN 9780905705392. Retrieved 19 November 2013.
- ^ Hunter, Dave (May 2012). "The Gibson GA-19RVT". Vintage Guitar. pp. 62–64.
- ^ https://www.tubedepot.com/t/tubes/preamp-tubes/7199