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Occasionally, one may find a used electric guitar equipped with an odd bar dangling from its bridge. This bar is called a tremolo or "whammy" bar. There are also other names for this device, such as vibrato arm or wang bar.

Actually, you will find many electric guitars with the tremelo bar feature at any Guitar Center store. While new models are popular, vintage used electric guitars with intact original equipment are the most valuable.

During the late 1940's and 1950's, this device was introduced and developed for guitar players. The tremelo arm or bar is still produced on certain electric guitar models today. The intent of the guitar tremelo bar is to create a vibrato effect.

Vibrato is the correct term for the pitch variation used by guitar players, but tremolo (actually a variance in volume), was introduced in amplification technology first and thus guitar players continue to use the misnomer tremolo for pitch variation.

Two styles of this device are the most popular and both devices work very simply. The strings are fastened to the guitar via the tailpiece. The strings are run across the top of the bridge. Within this bridge and tailpiece combination are springs that allow the bridge to move or "float". One style uses a rotating tube in conjunction with the springs. The other style operates the springs and bridge synchronously.

With the attached arm in motion and pressed either up or down, the device can alter the pitch of the notes being played on the guitar. As the springs guide the bridge up or down, this tightens or loosens the tension on the string. Thus, the vibrato effect is perfectly achieved when repeated slowly or rapidly.

Some of those who pioneered the use of the tremelo bar include Lonnie Mack (whose song "Wham!" may have led to the moniker "whammy" bar) and Leo Fender. Innovators of the use of the device in later years include Jimi Hendrix and Jeff Beck. More recently guitar wizards Eddie Van Halen and Steve Vai have taken the use of the device to new levels.

I encourage you to go to a guitar center and try a used electric guitar with a tremelo bar. They are fun to play and you'll be quite surprised with the many variations of sounds that you can produce. Nothing beats tremelo bars on used electric guitars!