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Old 16th April 2011, 12:23 AM   #31
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We tend to use strands of 24g solid core out of cat5 cable. Cryo treated with the Teflon jacket

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Old 16th April 2011, 09:37 AM   #32
M Gregg is offline M Gregg  United Kingdom
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We tend to use strands of 24g solid core out of cat5 cable. Cryo treated with the Teflon jacket

dave
Dave,


Thank's for your help.

Do you strip the insulation and then use the strands as a single flexible cable? Cover with either PTFE or Teflon.

I guess liquid nitrogen drop the cat5 strands in as a flex let it boil off. Then fit the jacket. How many strands or is it a trade secret?

I surprised you don't use PTFE silver coated copper flex? I guess you have tried other things? I am curious how you came to this conclusion!

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M. Gregg
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Old 16th April 2011, 08:25 PM   #33
M Gregg is offline M Gregg  United Kingdom
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Just a quick question,

I just noticed that the mounting screws for the Alpair 7 are just turned a small amount off center is this correct?

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M. Gregg
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Old 17th April 2011, 04:43 PM   #34
M Gregg is offline M Gregg  United Kingdom
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Dave,

Its a shame that the Alpair 7 does not come with the paint job you do.
LOL feels like there is something missing when you look at them.

I will try the cat5 I think the silver plated cable may be to bright. I will just go and get some Liquid Nitrogen from the tank in the garage "Not" ..LOL

I will strengthen the joints with silicone adhesive " Fish tank glue" should be interesting might help stop some resonance.

Just going to try cutting the mounting hole for the Alpair7..Not the easiest thing with the large step.

Any thoughts on connectors for the Alpair and "binding posts"?

Just trying to get the sound as intended with your design!

Regards
M. Gregg
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Old 17th April 2011, 08:53 PM   #35
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Quote:
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Do you strip the insulation and then use the strands as a single flexible cable? Cover with either PTFE or Teflon.
We strip the outer insulation and then separate the pairs. Typically we then just use one of those pairs inside (same colour in each box). For speaker cables, you can take it further, separating the 2 wires in the twisted pair and then either running the 2 strands roughly in parallel on a flat substrate (i used packing tape), or spiral it around something circular (Chris used plastic aquarium pipe, i have some (unused) cotton rope, foamed teflon would be really good).

Click the image to open in full size.

Quote:
I guess liquid nitrogen drop the cat5 strands in as a flex let it boil off. Then fit the jacket. How many strands or is it a trade secret?
You never drop stuff into LN, you pour the LN onto the object. I haven't done it myself. The 1st batch was done by one of the most experienced guys, the 2nd batch by an engineer/member at BC Hydro so that we could give away chunks at VI diyFEST. I don't know how much it helps, but it can't hurt.

Quote:
I surprised you don't use PTFE silver coated copper flex? I guess you have tried other things? I am curious how you came to this conclusion!
Speaker wire choice is a can of worms. What is "best" is very sysyem dependent, and out amoung the candidates there is huge amount of snakeoil out amoung the solid products,

So being frugal-philes(s), and believers in thin & solid core, we stick our heads in the sand, and just use the CAT5 strands, consistent, pure, decent sounding, & dirt cheap.

All our designs are intended to be made (have to be made) so that the speaker wire can be attached to the posts outside of the box (ie posts on a removable cup/plate), so that speaker wire can be changed.

Binding posts. We have found that all too often the blingier posts don't work as well as the cheap ones, We use a cheap, small round cup with cheesy looking plastic posts (but not metal). Small circular installation hole (50mm/ less panel weakening, but a little awkward to fingers tighten), minimal metal. We can swap out the posts to upgrade. (Eichmans are a tight fit)

dave
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Old 17th April 2011, 08:55 PM   #36
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Quote:
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I just noticed that the mounting screws for the Alpair 7 are just turned a small amount off center is this correct?
I have not noticed it, but i would not be surprised, A6.1 and A5 had mounting holes offset from the basket legs.

dave
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Old 17th April 2011, 09:00 PM   #37
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Its a shame that the Alpair 7 does not come with the paint job you do.
LOL feels like there is something missing when you look at them.
There are available... and the brave (with experience) can diy the spots.

I've been living with spotted drivers so long any without seem naked. But most important to me, about the A7eN, is the increase in DDR that expresses itself foremost as a 3D image that is quite abit deeper than the stock ones.

Click the image to open in full size.

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Old 17th April 2011, 09:30 PM   #38
M Gregg is offline M Gregg  United Kingdom
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Dave,

What can I say!
Thank you so much for the help.

From what I am told I think that the freeze and warm up with the Liquid Nitrogen has the effect of de-stressing the cable. A bit like how copper work hardens -but in reverse. This seems to effect the sound making it "Less harsh".


Regards
M. Gregg
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Old 17th April 2011, 09:34 PM   #39
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Imagine how neat those blocks would look if applied with a modified CNC plotter of some sort... now thats a DIY project.
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Old 18th April 2011, 02:09 AM   #40
Bigun is offline Bigun  Canada
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wow, Dave, I gotta say those cones look good with the polka treatment !
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