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Old 5th April 2003, 11:20 AM   #1
corbato is offline corbato  India
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Default DIY Speaker Binding Post

I hope this is the right forum for this thread.

Here are my plans for a DIY speaker binding post. II can see questions being asked as to why DIY such a thing. Especially when a pair of Cardas is available for $25 or so. Yes, but not so in India. You have to import the stuff and pay custom duty etc that will push the cost to stratospheric limits. So here we are, a quality binding post for less than Rs. 100 each (around US$ 2).
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Old 5th April 2003, 11:21 AM   #2
corbato is offline corbato  India
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The shaft ...
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Old 5th April 2003, 11:23 AM   #3
corbato is offline corbato  India
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...and the Nut
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Old 5th April 2003, 11:27 AM   #4
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The material will be pure copper bar. I am thinking of either gold or silver plated, but I suspect bare copper will sound better. A pair of them will be mounted in a 2” x 3” insulated acrylic board. All machining will be done in a CNC. I am also attaching the CAD drawing if anybody is inclined to play around.

Comment please
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Old 5th April 2003, 11:29 AM   #5
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sorry the AutoCad drawing doesn't attach..
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Old 5th April 2003, 12:47 PM   #6
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You must have a killer PC.

We never bother to model threads as the rendering goes all choppy when you rotate, pan, or zoom.

Those look good, but take a look at www.cardas.com you may be able to buy them for less than you can build them. They have the same binding posts.

Jeff
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Old 5th April 2003, 01:36 PM   #7
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He said, he expects the cost to be around $2. It is much less than Cardas. Comparing to Cardas, yours don't accept banana connectors, but this is not a big problem.
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Old 5th April 2003, 01:58 PM   #8
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Thanks for the comments

Quote:
Originally posted by Milzie
You must have a killer PC.
Not quite..a vanilla PIII. AutoCad 2000, and SolidWorks for simulation.

Quote:
Originally posted by Peter Daniel
... don't accept banana connectors...
As you rightly said, that isn't too much of a worry. I plan to use copper spades.

The Nut will have nurling edge. In the rendering I've missed out the retainer nut for the inside. But I need to know if the basic design is ok. Have never seen a Cardas.

Also, can some one confirm that uncoated copper should be better than Gold or silver coating. I don't see oxidation in copper as a major issue.

Thanks again.
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Old 5th April 2003, 02:05 PM   #9
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Those look great...you've inspired me. I'll have to get some copper stock and go crazy on my grandfathers lathe!

Quick suggestion maybe. On the shaft... i noticed it's completely round. What you might want to do...is make that biggest diameter HEX instead of round so that you can attach a wrench to it when you are securing the shaft from the inside. Otherwise...when wrenching a bolt on from the inside...you won't be able to grab it easily.

Good luck!

-Matthew K. Olson
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Old 5th April 2003, 02:12 PM   #10
corbato is offline corbato  India
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Quote:
Originally posted by Mattyo5
.... make that biggest diameter HEX...
Yes that did cross my mind, but I wanted to keep minimum number of operations. Perhaps I can grab the shaft with plier while tightening it.

Thanks
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