There's no intervening "spider" structure, and the strings' vibration is transferred directly to the National's cone through the "biscuit bridge." The sound difference is readily apparent.
The Dobro is softer, with a smooth "ringing" sound and a long sustain.
Allen Hopkins Gibsn: '54 F5 3pt F2 A-N Custm K1 m'cello Natl Triolian Dobro mando Victoria b-back Merrill alumnm b-back H-O mandolinetto Stradolin Vega banjolin Sobell'dola Washburn b-back'dola Eastmn: 615'dola 805 m'cello Flatiron 3K OM Ed, most notably the Dobros have the spider/cone set up and the Nationals have the biscuit bridge on the cone.
I don't think too many people play them as a main instrument more like a "fun" instrument or one for the collection like Banjolin and emando.
I bought one when I saw the Sam Bush in concert and he floored the audience with his playing slide blues on it.
The National is brash, aggressive, louder, with more of a "bark." There are many other differences.
Many National mandolins were made of metal, either steel or plated brass. National mandolins tend to have a longer scale, and often National owners tune them as mandolas, or at least at lower pitch than the standard GDAE.
("Dobro" is a contraction of Dopyera Brothers, and also means "good" in their native language.) After National Guitar Co.
went bust in the mid '30's, the Dopyeras re-acquired the name and assets and operated as National Dobro Co., making both kinds of instruments.Dobro mandolins have a short scale like a standard "A" model instrument.Both National and Dobro instruments are products of the inventive Dopyera brothers, Czech immigrants who started the National Guitar Co. After some business disputes with their co-owner James Beauchamp, they left and founded Dobro around 1930.Attached to it is an aluminum "spider," with legs that radiate to the edges of the cone; in the center of the spider is a wooden bridge over which the strings pass.The bridge transfers the strings' vibration to the spider, which in turn vibrates the cone, which makes the sound.I don't know the answer to your question but I'll be interested if someone does answer as I have one too.Tags: Adult Dating, affair dating, sex dating