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Old 22nd December 2004, 07:08 AM   #1
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Default Gainclone speaker cables and OTA diy

Hi All,

What are you using as speaker cable for the GC? I have tried copper foil as well as KLOTZ pro cable and both sound very good.

Has anyone tried the OTA cable? What exactly is this stuff that has the gaincard users raving with delight? Surely there must be a DIY version?!!

Ryan
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Old 22nd December 2004, 08:53 AM   #2
Nuuk is offline Nuuk  United Kingdom
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I'm using Cat5 - one pair for each conductor.
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Old 22nd December 2004, 12:03 PM   #3
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Quote:
I have tried copper foil
Copper foil from Alphacore works well for me. For some reason i seem to be allergic towards cats (5).
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Old 22nd December 2004, 12:17 PM   #4
DT is offline DT  Lithuania
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I am using Cross-Connected coax cable, a la John Risch design.
For me it is absolutely better choice than Cat5 in any mod. This cable removes any harshness , that was in my system with CAT5.
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Old 22nd December 2004, 12:25 PM   #5
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Quote:
Originally posted by DT
I am using Cross-Connected coax cable, a la John Risch design.
For me it is absolutely better choice than Cat5 in any mod. This cable removes any harshness , that was in my system with CAT5.

What coax are you using to cross-connect?

What's the OTA cable? How was that copper foil implemented?


Carlos
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Old 22nd December 2004, 05:16 PM   #6
DT is offline DT  Lithuania
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Carlos, i am using cheapest available coax cable with cooper solid core central wire and aluminium foil and cooper shield, aprox. 0.3$/m And i am very satisfied for now with these smooth-sounding cross-connected coaxials.
But i want to try this configuration of cables with better quality coaxials. Unfortunately there is no available Belden's in my country, and i do not know which cable is good alternative for belden.
maybe it is worth to try this cable :

Belden H1000

I just dont know what means "soft annealed cooper" ? And how this is suited to audio aplications?
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Old 23rd December 2004, 01:54 AM   #7
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Hi DT,

Belden H1000 you is not good for Jon Risch cross-connected coax for few reason:

1. center inductor is to thick: 2.6mm
2. copper braid is too loose: 50%

Regards,
---
David
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Old 23rd December 2004, 05:47 AM   #8
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Default Alpha core foil

Analog SA,

Is the alphacore foil the same as copper foil that can be brought in small rolls from stained glass outlets?
Is the alpha-core foil special in some way?
Which specific model do you buy and finally, how do you set-it up?
How do you prevent the foils from touching on speaker cable runs?
Is it not very fragile?
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Old 23rd December 2004, 07:07 AM   #9
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Hi Ryan

I just copied PD's recipe.

No idea what stained glass outlets sell but the Alphacore copper is very pure. For termination i used Cardas at the speaker end and just folded and cut the foil in a spade shape at the amp end. The foil is quite sturdy and although i felt bad about folding it and causing extra stress, it seems to play fine. No idea how to fit banana plugs though...
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Old 24th December 2004, 10:42 PM   #10
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The OTA cable is a very simple thin solid core cable. You can easily use your favourite thin solid core cables with great results. Note 47 Labs do not recommend twisting the OTA cables as it'll increase the capacitance. This is a very imporant point as some GC, especially ones without the zobels to go into oscilliation. Friend of mine made some cat5 twisted cables and his GC went into oscilliation, sounded like the speaker cone was cracking up.
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