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bottleneck

Tractrix Horn Build.

75 posts in this topic

Hi All

I know there are some keen DIY'ers here on WigWam, so this my (our) current project - a Tractrix horn build.

Calculations, Cad drawings, staining, varnishing etc all done by me - the wood turning is done by a pro-friend at mates-rates.


Initial detail -

wooden tractrix horn.

Drive unit - TAD 4002
Tractrix horn - 300hz horn, I cross it over between 600-800hz, we will have to see what sounds best on the new horn.
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first photo for you all -


the inner curve, drawn on autocad, and then ''biscuit'' sizes planned

when the biscuits are stuck together, they will form the wood tractrix horn.


[IMG]http://img526.imageshack.us/img526/8141/tractrixjpeg.jpg[/IMG]
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now, cutting of biscuits. Takes a bit of time this one.. and more skill than I have.

The wood horn is beginning to take shape.

[IMG]http://img714.imageshack.us/img714/6089/horn1b.jpg[/IMG]
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Looks fabulous so far! (Not that it won't look great when it's finished, of course.)

Nice to see pics of the stages involved.
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I assume that is the template for the curve for your friend to follow on the lathe. Oh and thats a bandsaw btw:) what wood are you using?[quote name='bottleneck']the ''inner'' tractrix curve - stuck onto board, and cut carefully!! on a jigsaw.

[IMG]http://img823.imageshack.us/img823/8577/tractrix3.jpg[/IMG][/QUOTE]
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Looking good - more horns to the world :^
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[quote name='Stupinder']I really wish I had the skill to do this kind of thing. Had I even an ounce of the aforementioned I don't think i would have abandoned my horn project quite so easily.
S[/QUOTE]

Yes I wish I had the skill and the tools, it would make my horn obsession a lot less expensive! Looking forward to seeing these evolve...
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[quote name='paulf-2007']I assume that is the template for the curve for your friend to follow on the lathe. ) what wood are you using?[/QUOTE]

Hi

Yes, template for inner curve. I've gone with birch ply, to see the side-grain on the finished horn - like with Cessaro.
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Great stuff Chris,
I'm smack in the middle of making some JBL H9800's using the layered birch ply approach(cnc'd throat) too.
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hi,

basically am currently using a type of copy of the TAD 2402 speaker

[IMG]http://61.63.55.133/36082/product_704180_o_1.jpg[/IMG]

I use a 1601b 15" (tad), Tad 4002, and a JBL 2405 as a tweeter.
The mid-range horn which this will replace, is a copy of the TAD one shown in the above image.
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