Using Coaxial RG-6 for IC's?

jakelm

ShinAce wrote: »

It is 20 gauge stranded center and only 72% shield coverage. Poor shielding.

Damn, i figured something was wrong for $19. Its very hard to find solid copper coaxial, at a good price.

unc2701

Yeah, you can do better- poor shielding and the capacitance is a touch high.

jakelm

I found this. 100 ' for $40. 95% shielding

http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=100-300

ShinAce

It has spare conductors, but looks fine.

jakelm

ShinAce wrote: »

It has spare conductors, but looks fine.

And a good price. Thanks Ace

Now to figure out what size and what RCA plug to buy.

Eric W

Why don't you just use RCA connectors for RG59? If you get the compression style, you'll need the crimp tool too:
Here are female RCA, wall plate female connectors:
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=092-712

Here is the solder type male plugs:
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=091-400

jakelm

Thanks Eric.

I bought this plug.

http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=091-120&CFID=21794565&CFTOKEN=18752688

And this cable.

http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=100-300&CFID=21794565&CFTOKEN=18752688

And a coaxial cutter.

My first DIY IC's so I will see how it goes. And I can solder pretty well. I will pick up different color shrink tubes.

WilliamM2

Why not use wire made for the job?

http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=100-282

Is there a reason you want solid core? If you are pulling that cable through a wall, stranded is more flexable, and much easier to pull as well.

jakelm

WilliamM2 wrote: »

Why not use wire made for the job?

http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=100-282

Is there a reason you want solid core? If you are pulling that cable through a wall, stranded is more flexable, and much easier to pull as well.

I assumed, 22 awg wire was too small to make 30' runs.

and I didnt see that wire...

jakelm

Should I cancell the coaxial order????? And get the mic wire instead??

Dmanit Will, where were you hours ago with this new information???



wait till after I order the damn cable to speak up...I should bust you upside the head....

Eric W

jakelm wrote: »

Thanks Eric.

I bought this plug.

http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=091-120&CFID=21794565&CFTOKEN=18752688

Ahhh those plugs, I've used them before. Be careful not to overheat while soldering the center or you'll have a nice misaligned tip that won't fit into the hole

WilliamM2 wrote: »

Why not use wire made for the job?

http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=100-282

Is there a reason you want solid core? If you are pulling that cable through a wall, stranded is more flexable, and much easier to pull as well.

Well, he asked about using RG-6 for an interconnect. The mic cable will certainly work, but the solid copper coax will be fine too. While stranded is going to be more flexible then solid- if its being run in the wall you really don't need that much flexibility. I mean its going to be no different then running the cable for satellite or cable TV.

Speaking of which to the OP, make sure you don't run that cable parallel to any electrical wires, leave plenty of slack at the ends, no sharp bends etc...

Eric W

jakelm wrote: »

I assumed, 22 awg wire was too small to make 30' runs.

and I didnt see that wire...

22 AWG is fine for line level signal. In the pro audio world, snakes are commonly 22 AWG running hundreds of feet (although they are balanced).

jakelm

The 2 cables are about the same price. Which would be a prefered method? Mic cable or coaxial?

I can call and cancell if the mic is prefered.

The IC's that i am building will be used in multiple ways, to run 30' to another sub and 4' to amp. So they will be cut into different lengths.

Eric W

Here's another thing to consider- the mic cable does not appear to be certified for in-wall use while the coax is. Typically all that means is the jacket is abrasion resistant for pulling through the wall and the levels of emissions should the thing ever catch fire.

As for which one- well, its up to you! I'll say, if you're going to have the wire sticking out of the wall (without a wall plate) I'd say go for the mic cable. On the other hand, if you're planning on using a wall plate on both sides, then go ahead and use the coax able.

WilliamM2

Here is a question I've always wondered about. If you use cable coax, you are using the outer braid for one of the signal wires. Is this really shielded?

jakelm

Eric Wong wrote: »

Here's another thing to consider- the mic cable does not appear to be certified for in-wall use while the coax is. Typically all that means is the jacket is abrasion resistant for pulling through the wall and the levels of emissions should the thing ever catch fire.

As for which one- well, its up to you! I'll say, if you're going to have the wire sticking out of the wall (without a wall plate) I'd say go for the mic cable. On the other hand, if you're planning on using a wall plate on both sides, then go ahead and use the coax able.

And the mic cable sure seems easier to work with (splicing a soldering wise). Dont ya think?

jakelm

Im not going through walls. Running under house.

Anyways, PE already shipped it out.... Damn they are too fast sometimes...


AHHHHH but wait. That coaxial comes with an additional 18 awg copper wires. I will use the coaxial for the sub and make smaller IC'c with the additional 2 18awg wires....

Look...Not all is lost.

http://www.partsexpress.com/pe/pshowdetl.cfm?&Partnumber=100-300&CFID=21794565&CFTOKEN=18752688

Eric W

WilliamM2 wrote: »

Here is a question I've always wondered about. If you use cable coax, you are using the outer braid for one of the signal wires. Is this really shielded?

The outer shield would be used as the "return" path and act as the shield, just like any other line level audio cable (except the "twisted pair" type).

jakelm wrote: »

And the mic cable sure seems easier to work with (splicing a soldering wise). Dont ya think?

Yes it will be.

jakelm

I edited my post above...sorry...

ShinAce

WilliamM2 wrote: »

Here is a question I've always wondered about. If you use cable coax, you are using the outer braid for one of the signal wires. Is this really shielded?

The shield is connected to ground, and therefore cannot carry a signal. It is the difference between the shield and center conductor that carries the signal.

Here's a question for you. If a cable had an outer conductor in coaxial configuration that wasn't connected to anything(free-air), would this provide sheilding?

It is not the physical presence of the shield that provides shielding, it is the voltage that it carries that performs this function.

jakelm

ShinAce wrote: »

Here's a question for you. If a cable had an outer conductor in coaxial configuration that wasn't connected to anything(free-air), would this provide sheilding?

.

Does aluminum foil protect a potato in an oven?

ShinAce

From prying eyes...yes.
From prying forks...no.

jakelm

ShinAce wrote: »

It is not the physical presence of the shield that provides shielding, it is the voltage that it carries that performs this function.

Go to red alert!!!!......Raise shields Lieutenat Worf

ShinAce

Aie Captain!

Aft shield is down to 95%.

jakelm

Damn Romulan volts, trying to get through our shields..

jakelm

Damn...Heat shrink is expensive....

$1.40 for 1 color 1 strip. I thought I saw it cheaper @ my local rat shack

ShinAce

We used to sell it $ 2 (canadian) for a 4 foot length. After having that deal, I find all heatshrink expensive. I would get it at cost for roughly 75 cents a length.

WilliamM2

Here's a question for you. If a cable had an outer conductor in coaxial configuration that wasn't connected to anything(free-air), would this provide sheilding?

It is not the physical presence of the shield that provides shielding, it is the voltage that it carries that performs this function.

No, but I have seen cables where the shield is connected to ground at only one end, and then they use two conductors in the center. Supposedly to help stop ground hum. But then the ground lead in the center is still connected to ground at both ends, so I.ve never really under stood how it helps.

ShinAce

If I have a wire that is a million feet long connected to ground at one end, the entire length is now a ground connection.

jakelm

ShinAce wrote: »

If I have a wire that is a million feet long connected to ground at one end, the entire length is now a ground connection.

Oh yeah, but what if its 1,000,001 feet??