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ServerBaboon View Drop Down
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    Posted: 16 Jan 2008 at 12:44pm
I know it's a bit cheeky to ask since you sell your own but you used to have some instructions on you website about making your own interconnects using CT100 cable. It seems to have disappeared, any chance publishing it again?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sol Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2008 at 9:39pm
Originally posted by ServerBaboon ServerBaboon wrote:

I know it's a bit cheeky to ask since you sell your own but you used to have some instructions on you website about making your own interconnects using CT100 cable. It seems to have disappeared, any chance publishing it again?
 
Pretty easy really ... take one piece of CT100 good quality to the length you need. Better quality CT100 has a solid copper core (24AWG high purity I think), air pocketed spacer, foil wrap and braided copper shielding all tighly held with non-PVC outer layer (IIRC non-PVC is prefered as PVC is a pure dielectric and leads to skin effect with the braided copper you'll use for your return path). Then take some 99.999% pure silver wire 0.05mm of approx the same length as your CT100 + a little bit..
 
Strip outer cover back a bit being careful not to cut the braiding. Twist braiding to make your return, removing foil cover to the outer cover as you twist the braided shield. This will reveal the air spacer. Trim this back a bit to reveal the solid core. Thread the silver wire through one air pocket, making sure not to kink it in any way, and wrap the end around the solid core copper and solder using good quality lead free solder. Repeat at both ends.
 
Take a phono plug  and use the solid core with wrapped and soldered silver as your signal path, and the copper braid as your return. The signal goes to the center and the return to the casing of most phono plugs. Solder in place, and plug her in. As an optional step you can wave the thing aorund to loosen the outer covering to reduce the contact with the braided copper - this supposedly can help to break the cable in!! 
 
Repeat many times and replace all your interconnects secure in the knowledge that you've just made some very cheap I/Cs, and with the money you've saved go and buy some music to listen to Clap
 
I did just that, and I'm very happy with the results.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2008 at 6:40am
Nice instructions Sol.

I'll try and dig out the pictures and put them on a thread soon. Quite happy to "give away" the "secrets" - some people don't solder so they buy ours, but anybody who has the time and skills...

One thing to watch out for using the silver wire is that it doesn't get broken in the "whirling" process. Breaking the grip of the insulation on the conductors makes a difference to the sound, so here's an idea - "whirl" or manipulate the cut lengths prior to assembly.

I'll also try very hard to do an article on why this "Whirling" works. I did it on another community, so it would be a good idea to feature it here.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote dc2 Quote  Post ReplyReply Direct Link To This Post Posted: 24 Jan 2008 at 6:21pm
Does anyone have experience with other coax cable?
I ask as I have Belden 1865A, would this make a good audio interconnect?
To now I have used it only to patch video signals from matrix bays to recorders.
Any help would be gratefully received.

It’s part of the Brilliance range with the following spec,
Sub-miniture RG59
Centre core, Stranded 25 AWG
Overall diameter, 3.81mm
Insulation Material, Gas-injected FHDPE - Foam High Density Polyethylene
Outer Shield Material, 100% coverage Duofoil
Tinned Copper 95% braid coverage
Outer Jacket Material, PVC

ELECTRICAL CHARACTERISTICS:
Nom. Characteristic Impedance 75 Ohms
Nom. Inductance .093 µH/ft
Nom. Capacitance Conductor to Shield 16.5 pF/ft
Nom. Conductor DC Resistance @ 20 Deg. C 27.4 Ohms/1000 ft
Nominal Outer Shield DC Resistance @ 20 Deg.C 5.4 Ohms/1000 ft
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sol Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 2008 at 6:17pm
The simply answer is try it and see .. it takes no time to make up an I/C assuming you have some phono plugs to solder to each end.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dc2 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2008 at 6:24am
Thanks Sol

The cable is for my turntable which has a SME socket.
Looking at prebuilt cables, manufactures seem to produce cables that will suit MM cartridges but not MC, why is this?
What properties does the cable need to support both type?
Is it low capacitance, good screening.
I'm a little confused and looking for some light on the subject.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2008 at 10:48am
We're eagerly awaiting some SME type cable plugs from the US when we'll be making our own arm cable to suit both MM and MC.
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