Here's a quick sketch. BTW what I called "butterfly bolts" are actually called "toggle bolts"
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Winter Build Off 2020 - Sub-woofer On A Stick
- Thread starter 2groggy
- Start date
Here's a quick sketch. BTW what I called "butterfly bolts" are actually called "toggle bolts"
That looks like a workable idea. Just one more thing you need:
Put the foam weatherstrip ring between the flange of the dog dish and the underside of the wood top. Now you've got a full flexible seal that allows the dish to move, with adjustable springs to balance the load.
Measure the thickness of the weatherstrip uncompressed and fully compressed. Then, when you get the strings on and up to tune, adjust your springs so the weatherstrip is halfway compressed. So the dog dish is floating with it strung up and static. Pluck a string, and it'll throw some air at you. Low frequency air.
Looks like a winner. Will the friction from the spring be enough to keep the nut on toggle bolt from just rotating with the screw?
Probably not. I'm thinking that I may need to make up a lower ring with threaded holes instead of the toggles.
Edit - and I wouldn't want the cone to hit the toggles. I don't mind a "clanky" bass sound, but that would be going too far.
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I read this yesterday and boy did that take me down a mental rabbit hole. My fingers are tired from all the googling. Sounds like an amazing concept!
yes it does! you guys are amazing with your 'stuff'! Bruce Johnson always amazes, delights, and entertains!I read this yesterday and boy did that take me down a mental rabbit hole. My fingers are tired from all the googling. Sounds like an amazing concept!
yes it does! you guys are amazing with your 'stuff'! Bruce Johnson always amazes, delights, and entertains!
What also amazes me is that even though there is a limited number of people building, there are many more contributing, watching, and
ing.
Not sure why you'd be amazed.....What also amazes me is that even though there is a limited number of people building, there are many more contributing, watching, and
.....Speaking for myself, the Winter Build-Off is the highlight of the year.....
All of that skill, so generously shared.....The wonderful works of art that are being produced right in front of my eyes......Last, but not least, the generosity of our Luthiers for putting up with idiots like me.....
....A general
to all of you!......
I agree, I really enjoy following the builds, seeing the creativity, the engineering and design, as well as the functional art which is produced. To quote @Fat Freddy "Not sure why you'd be amazed.....
Speaking for myself, the Winter Build-Off is the highlight of the year.....
All of that skill, so generously shared.....The wonderful works of art that are being produced right in front of my eyes......Last, but not least, the generosity of our Luthiers for putting up with idiots like me.....
A general
"
I'm making some progress on the neck.
Poplar with a zebra wood finger board. There's a thin layer between the neck and FB with contrasting blocks in place of side dots.
I've rough shaped the back of the neck the same way as last time, but didn't take pictures. I'll take pictures when I'm done shaping.
I've rough shaped the back of the neck the same way as last time, but didn't take pictures. I'll take pictures when I'm done shaping.
Thanks. Truth be told, I tried this because I've never been satisfied with the accuracy of my drilling the holes for the side dots.
Neck attempt 2 is now shaped and the finger board has been radiused.
I still need to deal with the head stock. By now, you shouldn't be surprised that I have abnormal, I mean unusual... I mean unconventional design ideas. What do people think about the idea of leaving a little bit of the original shape and paint from the reclaimed window sill of when the house was built in 1952? I like the historical context. Am I already far enough outside the box that this would be too much? I could keep the white bull nose in the top right corner of this picture.
I still need to deal with the head stock. By now, you shouldn't be surprised that I have abnormal, I mean unusual... I mean unconventional design ideas. What do people think about the idea of leaving a little bit of the original shape and paint from the reclaimed window sill of when the house was built in 1952? I like the historical context. Am I already far enough outside the box that this would be too much? I could keep the white bull nose in the top right corner of this picture.
Me?.....I'd keep it.....Neck attempt 2 is now shaped and the finger board has been radiused.
I still need to deal with the head stock. By now, you shouldn't be surprised that I have abnormal, I mean unusual... I mean unconventional design ideas. What do people think about the idea of leaving a little bit of the original shape and paint from the reclaimed window sill of when the house was built in 1952? I like the historical context. Am I already far enough outside the box that this would be too much? I could keep the white bull nose in the top right corner of this picture.
The carbon fibre look might not make it to the end of the build. I tried building panels with a foam core and they just seemed too soft. I will build at least two different fronts with different resonators to compare the sound, but I am running short of carbon fibre cloth, so I will likely resort to fibre glass cloth, which wets out clear, showing the core below.
I've gotten the neck to the point where I can cut the neck pocket and get back to building the body and test some resonator configurations.
Interesting how the streak of discolouration in the poplar lines up like a racing stripe on the head stock. Maybe it will help me play faster. 
And here is the artifact - the painted bullnose on the back of the headstock remains from the window sill I removed in one of the house renovations.
Oh yeah.. zero fret. Hate away. I don't care because it make cutting the nut sooooo much easier.
And here is the artifact - the painted bullnose on the back of the headstock remains from the window sill I removed in one of the house renovations.
Oh yeah.. zero fret. Hate away. I don't care because it make cutting the nut sooooo much easier.
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