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Type: Posts; User: Chris Baird

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  1. Replies
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    Re: Chris Baird's shop burns - Arches Mandolins

    Hi All,

    I just wanted to give an update to those who had deposits in with me.

    I've just now gotten back into my house. It had to be remediated for smoke damage and have the windows replaced. ...
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    Re: Arches mandolins

    Hi All, Sorry for being unresponsive. I have a health condition that required that I take a full-time job (non-mandolin related) in order to get health insurance. Not my ideal scenario, but,...
  3. Thread: Sustain ?

    by Chris Baird
    Replies
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    17,443

    Re: Sustain ?

    Besides damping (heat/friction, and sound radiation), acoustic impedance plays a major role in sustain. As the pressure wave moves between various materials a certain amount of energy will move...
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    Re: Neck and fingerboard build questions

    For my kits the riser block is glued on first and then the the neck joint cut into the riser block and the rim. The joint just barely has enough room for glue, so there wouldn't likely be any creep,...
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    Re: Neck and fingerboard build questions

    Hi Brick, You should glue the fingerboard extension on first, then level it and the riser block flush with the neck prior to gluing the fingerboard on. To level them down I use a long flat piece of...
  6. Re: anyone built an Arches Mandolin kit? like to hear your thoug

    Website is cleaned up and safe to visit again.
  7. Re: anyone built an Arches Mandolin kit? like to hear your thoug

    Hi all, my website currently seems to have a malware infection. I've hired someone to clean it up. But, you may want to avoid the above links to my kits. Sorry, should be cleaned up soon.
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    Re: Arches mandolins?

    Hi All, I'm still building both kits and finished instruments. My waitlist is always fairly long for both, so I don't spend any time advertising, just stay busy building.
  9. Re: whats considered one of the better mandolin kits(A style) to

    Hi All,

    A quick update on Arches Kits.

    I had some family related medical issues that brought the Arches kit production down significantly over the last year, and so I have a rather long wait...
  10. Re: Ben' Mill: Water powered woodworking tools from 150 years ago

    Most towns, at least in the west, have a creek or river (or two) named "Millcreek". Very common, makes me want to research the history of the mills that gave the creeks around me their name.
  11. Re: Will someone explain radiused fingerboards to me?

    Hi Bill,

    Hold your hand up as you would play chords, fingers are still in a radius, with pinky finger by far, lowest down. At least that is how they fall naturally for me. It's a natural thing,...
  12. Re: Will someone explain radiused fingerboards to me?

    Hold you hand up to your face, palm facing. Bend your fingers down in a natural way. Your fingers will likely be in a radius, as opposed to being flat across and level with one another. Index and...
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    Re: For all you wanna be builders - A new kit.

    Hi All,

    My motto is - "The more mandolins in the world the better!". So I offer kits to those with nothing but a desire to build and a kitchen table. I do hope to offer kits at a lower price...
  14. Re: Building an A-Style Mandolin: F-hole vs. Oval Hole

    On some modes, the sides actually carry the mode over to the back. I have also made my sides rather thin, around .085", but Gilchrist and older Gibson sides are more like .100-.120". Thinking of...
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    Re: DIY Mandolin Kits: Worth it? Best one?

    kkmm,

    Prices aren't set yet, but, please use the "enquiry" form on my website to contact me and I'll give you more info.
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    Re: DIY Mandolin Kits: Worth it? Best one?

    Planning to provide kits as well. Check my website below.
  17. Re: The greater the neck angle the taller the bridge.

    Ok, yes, I am using "FFT" to refer to data obtained from a time domain signal transformed into frequency domain using an FFT. I should have used the term "spectrum", or FFT results, or frequency...
  18. Re: The greater the neck angle the taller the bridge.

    An FRF is more consistent and reproducible than an FFT because the input is also a factor in the FRF. Which means that you can bonk at different levels of force and come out with nearly the same FRF....
  19. Re: The greater the neck angle the taller the bridge.

    As I've said, I'm not trying to explain anything, only report that I've seen significant changes to the modes with changes in string tension. I've seen it many times with both microphone gathered...
  20. Re: The greater the neck angle the taller the bridge.

    How is it that a string's modes can change with tension where as a mandolin's body modes can't?

    Like I said, in any event, I'll gather some more data and we can discuss.
  21. Re: The greater the neck angle the taller the bridge.

    Dave,

    I'm not really sure what you mean when you infer that I'm interpreting my data wrong. I'm careful to take my measurements the same way, and, as you know, frequency response functions help...
  22. Re: The greater the neck angle the taller the bridge.

    I actually use an accelerometer and a small pcb force transducer hammer to gather frequency response functions. I'll post some data when I string up the next batch of mandolins. I also damp the...
  23. Re: The greater the neck angle the taller the bridge.

    Arigato,

    I'm not sure what causes the effect I described, however, it can easily be tested as I've said. Try it and see. The forces that the string tension exerts throughout the mandolin affect...
  24. Re: The greater the neck angle the taller the bridge.

    Neck angle can affect the string's breakover angle at the bridge, which can affect the downward force on the top. The amount of downward force affects the modal frequencies of the instrument and...
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    Re: Good grain/pore filler recommendation

    I use system 3 clear coat with fumed silica. Works well for filling the grain in the "invisible way". But, is a mess. Been meaning to try fumed silica and shellac/fp method, vs shellac and pumice....
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