Posted by MarkCarlsen on October 26, 2001 at 08:23:04:
In Reply to: Re: This is new one to me! posted by François Blais on October 26, 2001 at 07:06:40:
:: : A gentleman that I know saw me playing in a group, and said he had a bass he wanted me to have. In his attic quite some time it developed some cracks in the carved top, so I have removed the top to get started, and when checking the bassbar for looseness, I noticed it also was carved from the blanks when the top was carved. Seems to me that would be a good method compared to a separate bar glued to the top. This bass only has Germany stamped inside, and looks like a student quality. It has a flat back & no purfling or ebony. The machine heads have the wood peg. I believe it to be around 60 years old!
: : I just thought someone might get a bang out of the bassbar, or maybe someone knows a reason for a "glued in" bassbar having benefit.
: A carved bassbar is useless!
: The bassbar must be made separately and glued in to the top, under tension.
: That means the bassbar doesn't exactly match the top's inside curvature, and when it's glued in place, provokes a tension in the top.
: This tension, coupled with the soundpost when the top is matched with the whole resonance chamber, is very important to get a properly working acoustic system.
: Sorry for my bad english, main language is french, but I hope you get the picture!
Obviously someone with very little knowledge on the subject.A carved bass bar is not the worst case ,I play a hybrid with a carved top and bass bar[Hungarian] and alot of German basses from this era show up in my shop with this feature.My bass sounds just fine and I will never have to worry about the bass bar coming loose.
As far as the Tension or commonly called "Springing" the bas bar it helps but you must be carefull how much you use as you can create problems later such as sagging top.The notion that it must be a glued bass bar is wrong.
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