Excellent Jim, thanks a million for this.
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| Author: | Jim Watts [ Tue Apr 28, 2009 12:24 am ] |
| Post subject: | A Voicing Box |
There was a request to see a voicing box in one of the other threads. Here's mine, it was inspired by debates with engineering friends over the merits of free plate tuning vs. fixed plate tuning. Either can work. The top plate of the box is concave and has a 25 ft radius on the rim, it holds my tops in upside down giving complete access to brace carving and tapping at the same time. The box volume matches the volume of guitar, providing similar air coupling. The clamp ring is bolted down using 1/4-20 bolts into t-nuts in the top plate of the box. I like it. Attachment: tapping-frame-1.jpg An unbraced top installed on the box. Attachment: tapping-frame-2.jpg As is evident in the 2nd photo I can also make deflection measurements with it. Oh, it's sounds great with a completed top on it, you can really get a lot of information off of one of these. |
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| Author: | Bill Hodge [ Tue Apr 28, 2009 8:46 am ] |
| Post subject: | Re: A Voicing Box |
Excellent Jim, thanks a million for this.
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| Author: | James Orr [ Tue Apr 28, 2009 12:42 pm ] |
| Post subject: | Re: A Voicing Box |
Thanks, Jim! And you just tap as normal? |
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| Author: | Chris Paulick [ Wed Apr 29, 2009 3:24 pm ] |
| Post subject: | Re: A Voicing Box |
Thanks for showing us this. |
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| Author: | Barry Daniels [ Thu Apr 30, 2009 12:28 pm ] |
| Post subject: | Re: A Voicing Box |
Jim, That is very nice. I have actually been planning on making something similar. How did you go about cutting the upside down radius in the top edge? CNC? |
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| Author: | Jim Watts [ Fri May 01, 2009 12:15 pm ] |
| Post subject: | Re: A Voicing Box |
Hi guys, James - yes you tap as normal I suppose. but it's more tactile for me. It sounds like tapping on a closed guitar body you can feel/listen for responsiveness, measure delflections and see how the air is pumping out the sound hole. Barry- yes I cut the groove on radius groove on a cnc. Oh, I should of mentioned the clamp ring has 3/16 o-ring cord stock on it as the clamp interface. |
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| Author: | Jim Watts [ Fri May 01, 2009 2:06 pm ] |
| Post subject: | Re: A Voicing Box |
Jim Watts wrote: Barry- yes I cut the groove on radius groove on a cnc. Boy, what was that saying? What I meant was it's a radius recess cut on a cnc. |
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| Author: | ClintB [ Fri May 01, 2009 2:11 pm ] |
| Post subject: | Re: A Voicing Box |
Thanks for sharing this, Jim. I think I'm gonna make my own as well. Cheers. |
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