F Dim Chord on Octave Mandolin
How to play the F Dim chord on Octave Mandolin: fretboard diagrams, finger positions, the notes that build it, and alternate voicings up the neck.
The F Dim chord is a diminished chord built from stacked minor thirds, often used as a passing or leading chord. It is built from the notes F, G#, B. This page shows how to play F Dim on Octave Mandolin with clear fretboard diagrams and suggested finger positions.
The lowest shape sits at fret 9 and spans 5 frets, with no open strings in it. F falls on the G string. It sounds from F3 up to F5.
Octave Mandolin is strung in four courses of two, so each stopped note here sounds as two — which is why the shape rings thicker than the same grip on a single-strung instrument.
Browse alternate voicings to find the one that sits best under your fingers, then compare it with the other chord types built on F or explore the same shape in nearby keys. The diagrams list the notes in each voicing so you can connect the shape to the theory behind it.