Other configurations are also possible including the Pentode, a tube with 5 active elements providing an additional amplification factor.There are a large number of tube varieties and uses.In it's simplest form a vacuum tube can be created to operate as a diode: a device that conducts current only in one direction.A third element called a "control grid" can be added to the design which provides the ability to amplify a signal.A=1969 A=1970C=1971 D=1972E=1973 F=1974 G=1975 H=1976 J=1977 K=1978 L=1979 M=1980 N=1981 P=1982 R=1983 S=1984 T=1985 U=1986 V=1987 W=1988 X=1989 Y=1990 Z=1991 Z=1992 Disclaimer: These charts are for informational purposes only and are not a substitute for consulting your amp tube chart, amp repair shop and amp manufacturers instructions.We are not responsible for typographical errors, inaccuracies and omissions on this web site.However, tubes are still used in several specialized applications such as guitar amplifiers (also called a valve amp outside the U.
These electrons will be drawn to a metal "plate" inside the envelope if the plate (also called the anode) is positively charged relative to the filament (or cathode).
Replacement tubes and transformers are readily available for these amps however there are many boutique amp manufacturers making new tube amps with a vintage sound.
A transformer is an electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts.
Transformers are used to convert between high and low voltages, to change impedance, and to provide electrical isolation between circuits.
This is useful in converting the voltage from a wall outlet, typically 120 or 240 volts, into a higher voltage required by tubes in tube amps .