Watch the Dominant Soloing 2: 3 online guitar lesson by Brad Carlton from Bluesology 1
Let's take a look at the dominant 13th chord. We will be superimposing thirds starting with the root all the way up to the 13th: on the way we'll exclude the 11th. So, starting with C as our root we will have C-E-G-Bflat-D-A (1-3-5-flat7-9-13). A jam track for the I chord is provided. You'll notice that the piano part has been omitted on this track giving your ear a chance to hear these extensions against the roots in the bass part.
The IV 13th and V 13th will be presented in this lesson as well.