Watch the Dominant 7th online guitar lesson by Jason Loughlin from 1-2-3 Rockabilly Guitar
In this segment we will learn a C Dom7 chord shape. We'll start by placing your 1st finger on the third fret of the A string. Next we will take our 3rd finger and place it on the fifth fret of the D, G and B strings. You accomplish this by hyper extending your finger so it can barre across all the strings. Finally put your 4th finger on the sixth fret of the E string. This is a movable chord shape. In other words it can be played anywhere on the guitar neck. The chord gets its name from the root of the chord which can be found on either the A or G string. If you wanted to make this an E Dom7 chord you would simply find an E note on the A string and build this shape. Make sure to avoid hitting the low E string. It's not part of this shape.