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Building something like a bass viol #8: The Bass Bar

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Blog entry by Dave Rutan posted 11-13-2020 09:56 PM 333 reads 0 times favorited 4 comments Add to Favorites Watch
« Part 7: Fingerboard Part 8 of Building something like a bass viol series Part 9: Attaching the top/front »

Since this is basically a cello-size instrument, I’m installing a cello-size bass bar in it. I’m starting with a piece of spruce that is a little taller than I need. For those who don’t know, the bass bar in a string instrument adds strength to the top against the pressure of the bridge.

I actually put off this step by a day because my ‘bass bar’ clamps got left home after my teardrop fiddle build earlier this year.

After it’s glued in, I shaped it using the usual assortment of chisels and planes. Note that I also cut the C -shaped sound holes. It’s always easier doing that before gluing in the bass bar.

The ends get tapered on either end from a plateau in the center. The edges also get a rounding over for esthetics. This is important to impress whatever luthier opens up the instrument in the far distant future.

-- Ni faru ion el ligno!



4 comments so far

View Oldtool's profile

Oldtool

3267 posts in 3351 days


#1 posted 11-14-2020 12:44 AM

I understand the necessity for the bass bar and the strength it adds, but pardon my ignorance and explain why it is off center? Isn’t the bridge centered on the top?

-- "I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The point is to bring them the real facts." - Abraham Lincoln

View Dave Rutan's profile

Dave Rutan

2009 posts in 3349 days


#2 posted 11-14-2020 01:46 AM



I understand the necessity for the bass bar and the strength it adds, but pardon my ignorance and explain why it is off center? Isn t the bridge centered on the top?

- Oldtool

The bass bar is positioned under one foor of the bridge, (the bass side) The treble side of the bridge is (sort of) supported by the sound post inside the instrument.

-- Ni faru ion el ligno!

View Dave Polaschek's profile

Dave Polaschek

7959 posts in 1743 days


#3 posted 11-14-2020 03:01 AM

And the sound post gets stuck in through the C hole, right?

-- Dave - Santa Fe

View Dave Rutan's profile

Dave Rutan

2009 posts in 3349 days


#4 posted 11-14-2020 11:37 AM



And the sound post gets stuck in through the C hole, right?

- Dave Polaschek

Correct, it is installed through the sound hole.

-- Ni faru ion el ligno!

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