Learn diminished triads by degree and sound with the one-string, one-finger method, understanding the relationship between minor triads and diminished triads. Play these triads in various fretboard positions – vertically, horizontally and in the same inversion. Enhance your solos by combining these triads with other elements including 7th chord arpeggios and the Harmonic Minor scale. Guitar: Fender (1978) Mustang in Fiesta Red. D’Addario ECG24 (.011-.050) Strings. Fender Pro Reverb (2) Amps. Lehle P-Split. BOSS RC-3 Loop Station. Providence E205TF Cables. Pickboy TF Signature.