Watch the Solo Over A Blues Progression online guitar lesson by Jimmy Heffernan from Dobro Handbook
Let's look at the positions we can use for a blues in A, over the 1, 4 and 5 chords. We'll be using the flat 3, flat 5 and flat 7 note in addition to other A major scale notes.
The open D string is now our 4th. The open G is now our dominant 7th or flat 7. This creates some new ways of finding convenient licks that work in A.
In this video, I'll play a solo/head to illustrate these areas and what they can do. All of the non-open note licks from G work as well if you just move 'em up two frets. Have at it!