In the late 1920's it was three men in Los Angeles that created the National Resonator guitar. George Beauchamp, an LA musician, had the original idea of creating a Hawaiian guitar, which sat on a stand, and had a horn attached to the bottom. Two brothers, John and Rudy Dopyera, started to work with him, Beauschamp’s first idea failed, as the brothers knew it would. John experimented with a design that used three very thin conical shaped aluminium resonators inside an all-metal body, he applied to patent his ‘tricone’ guitar in 1927.
Beauchamp found the investors, and the National String Instrument Company was formed. Production began in 1927, and by 1928 they were producing hundreds a week; at the peak nearly 50 instruments a day were made.
In 1928 Tampa Red was the first Blues artist to record with a National steel resonator-type guitar. Listen to ‘Denver Blues’ from 1934 to appreciate the man they dubbed ‘The Guitar Wizard’.
The Single Resonator Model
Problems soon emerged when Dopyera rejected Beauchamp’s idea of making a guitar with a single resonator. Beauchamp thought this the perfect design for a lower cost instrument and with the Depression just around the corner he was proved right. The single cone type, patented by Beauchamp in 1929, saved National from bankruptcy.
The National was intended for Hawaiian and Jazz players but it became the favoured guitar of the great Blues guitar players of the late 1920’s and 30s. Beauchamp's patent caused a rift between the two parties and Dopyera left National. In 1928, John Dopyera began to work on a wooded-bodied guitar with a single cone. He called this the DOBRO; made up from Do(pyera) and bro(thers). Then in 1932 the companies merged and became the National-Dobro Company. The cones of a National were volcano shaped, while a Dobro was dish shaped. The wooden-bodied Dobro were marketed as an inexpensive alternative to the metal Nationals, with Dobros becoming associated with acoustic country music and artists like Jimmie Rodgers and Roy Acuff.
Cliff Carlisle was the first to record playing a Dobro.
The cost of a National in the 1930s varied according to the model. A Duolian cost $32 to $35, a Triolian $45 to $50 and a Style O around $65.00. The tricone has a smoother tone, with greater, richer, sustain (the notes last longer). The single resonator had a sharper, and clearer sound, it had much more attack.
Tampa Red: Tricone guitar
Son House: single resonator, either a Triolian or Duolian
Bukka White: square neck tricone
Bo Carter: Style N
Blind Boy Fuller: Duolians
Peetie Wheatstraw: Tricone
Scrapper Blackwell: Triolian
Bumble Bee Style O
Black Ace: Tricone
Reverend Gary Davis: single cone
Oscar "Buddy" Woods: A Tri-plate
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