Construction of the Russian is very similar to that of the western
6-string guitar except for the additional string. The same basic components are present: headstock; nut; tuners; neck; fingerboard; frets; inlays; truss rod (in modern instruments); heel; body; bridge & bridge saddle; soundboard (top); sound hole and rosette; back; sides; strings. Woods used and internal bracing layouts are also similar.
Types There are two basic types of Russian guitar: the "classical" model and the "gypsy" model. The classical model closely resembles the western 6-string classical guitar, and has nylon or gut strings. The gypsy model is steel strung, and resembles the western 6-string steel-string acoustic guitar, although more size and shape variations are found among gypsy guitars. A two-necked version of the Russian guitar was also once popular; these guitars usually had 11 or 12 strings—one neck with seven fretted strings, and another with four or five unfretted strings. There are also some rare specimens that were built with an oval body.
Head The head or "headstock" is located at the end of the guitar neck farthest from the body. Modern instruments are fitted with
machine head tuners, though older instruments (particularly from the 19th century) have friction pegs. The tuner layout is usually in one of two forms: "4+3", with four tuners on the bass-string side of the head and three on the treble string side; or "3+1+3", with three tuners on each side of the headstock and one in the middle. The nut is a small strip traditionally of bone, but plastic, brass, and other materials are also sometimes seen.
Neck Headstock, fingerboard (fretboard), and truss rod (if present), all attached to a long wooden extension which collectively constitutes the neck. The wood used to make the fretboard usually differs from the wood in the rest of the neck. The neck joint or heel is the point at which the neck is attached to the body of the guitar.
Fingerboard The fingerboard is made of hardwood (ebony or rosewood are common), fitted with metal frets of brass or steel. Fret spacing almost always follows the western
twelve tone equal temperament (12-tet) system. The surface of the fingerboard may be flat or curved slightly ("radiused"), although the radius of a curve on the Russian guitar is usually somewhat less than that of an equivalent western 6-string guitar. Inlayed position markers are common, and appear in the same locations as 6-string guitars (e.g., typically the 5th, 7th, 9th, and 12th frets, among others).
Body The sound board is usually made of spruce or cedar, and sized and shaped much like that of the 6-string guitar. Overall proportions of classical seven string instruments (nylon string) are similar to those of 6-string guitars. "Gypsy" instruments (steel string) may be proportioned similarly, but also may often feature a narrower upper bout, and an enlarged sound hole. Both traditionally shaped instruments and instruments with cut-away bodies are available. The bridge is made of a hardwood similar to that used for the fingerboard, and the bridge saddle is usually bone or sometimes plastic; on old instruments, ivory was sometimes used. A pickguard, or "scratchplate"—usually a piece of laminated plastic—is frequently found on steel-string "gypsy" instruments; on nylon-string classical instruments it is usually lacking.
Strings As noted above, Russian guitars may have either nylon (or equivalent non-metal) strings, or steel (or equivalent metal) strings, depending on whether the instrument is a classical or gypsy guitar. On classical instruments the four lower pitched strings are generally wound, and the three higher strings are of plain material. On gypsy instruments five strings are wound, and the top two are plain.
Measurements Proportions of Russian guitars typically do not differ greatly from those of western 6-string instruments. Since the range of both types of instrument are comparable, this makes acoustical sense. One notable physical difference, however, concerns string spacing: since Russian guitars have essentially the same neck width as 6-string guitars, the 7 strings on the Russian instruments are necessarily closer together. Comparison of dimensions:
Handedness Left-handed Russian guitars exist, but are extremely rare. ==Tuning==