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  Cable directionality
I'm sure this has been discussed before but I missed it, so what is all this stuff with the direction of voltage flow with cables? Every cable you see any more has a little arrow on it. Since the signal is AC and travels one direction as much as it travels the other, what difference could this possibly make. I have talked to numerous co-workers (all electrical engineers) and they ALL say this is the biggest bunch of bunk they have ever seen. Since I am the only "Audiophile", I try to keep an open mind(I'm also the odd man out being mechanical.) Skin effect, resistance, capacitance, etc. are true issues. You pass power through a wire and it creates a magnetic field. You do deal with impedence and synergy with the driving source. How about a few technical answers from the audiophile community.
Bigtee  (Threads | Answers | This Thread)

08-26-02
  Responses (1-39 of 39)
Click title to read one, or click date to read all below it.

08-26-02   Because the moon is made of cheese. isn't some of these sig ...   Marty9876

08-26-02   I've wondered a bit about this myself. the only logical con ...   Rives

08-26-02   I posted this some time back. if you search the archives yo ...   Mg123

08-26-02   the cable will have two inner conductors and the shield isn ...   Richingoth

08-26-02   Rich, a lot of cables are terminated with both ends of the s ...   Bigtee

08-26-02   The shield is typically connected at source end in pro appli ...   Gregm

08-26-02   Having developed interconnects i think that directionality i ...   Orbeck

08-26-02   Orbeck, tara labs is using this design with their isolated f ...   Bigtee

08-26-02   The arrows are there to satisfy audiophiles who think direct ...   Bomarc

08-26-02   In general, the reason that the shield of a twinaxial cable ...   Audioengr

08-26-02   I'm glad to hear the vast word from audioengr! i might add ...   Marakanetz

08-26-02   And another cable question to orbeck: how long it's needed ...   Marakanetz

08-26-02   Geeze, here we go with the signal return, etc. the signal re ...   Bigtee

08-26-02   I'm glad we have a cable designer here--welcome orbeck. as ...   Rives

08-26-02   Bigtee, please don't confuse voltage with current. in orde ...   Jjwinterberg

08-26-02   Ok so interconnect shielding is grounded at one end only, he ...   Seandtaylor99

08-26-02   John, but what if the shield is only connected at one end as ...   Bigtee

08-26-02   Bigtee, you are confusing a "shield" with a " ...   Mrowlands

08-27-02   Sorry, but i can't help but be somewhat amused by this threa ...   Zaikesman

08-27-02   Zaikesman ... i'm an electronics engineer. we engineers are ...   Seandtaylor99

08-27-02   I have direction all speaker cables, and i have tried. i di ...   Ohlala

08-27-02   Bigtree - here is why your single-wire scenerio worked: the ...   Audioengr

08-27-02   Seandtaylor99 - i have also tried it and found no difference ...   Audioengr

08-28-02   Audioengr, so, lets take a 60hz signal and run it down the & ...   Bigtee

08-28-02   Seandtaylor99, no accusations were made or intended (and i d ...   Zaikesman

08-28-02   Zaikesman---amen brother!   Bigtee

08-28-02   Cable directionality is one of those things that is very eas ...   Rcrump

08-28-02   Bigtee .. i think audioengr was saying that your signal grou ...   Seandtaylor99

08-28-02   "audioengr, so, lets take a 60hz signal and run it down ...   Audioengr

08-28-02: Bigtee
Audioengr--- well, I didn't get to talk to the EE's here at work today, duty called. However, I will. I still don't understand this so I will get one of my troopers to explain it up close and personal. With house wiring, the neutrals are connected straight to the buss bar in the breaker panel and and connected to earth ground. I still don't understand your previous analogy of the battery and bulb since DC does flow in one direction period. And you do have positive and negative on DC. There is no such thing as positive and negative on AC which it would have to be. The return would be negative. As I said before, you have the positive half cycle and then the negative half cycle that "Flows" the opposite direction on the same wire. In an Air Conditioning unit you have a step down transformer usually 120/230 to 24 volts. On the output of the secondary, one side is tied directly to earth ground and also serves as the common for the wiring activating all the small 24VAC coils on relays. The other runs to the other side of the coils. I still can't believe that you will have an opposite polarity running through the unit chassis. I know I can't measure it because I have tried. Why would it go back when the path of least resistance is to earth and not through the resistance in the wire? AC is AC is AC. It doesn't matter if its in a house, an Air Conditioner or a signal carrying cable. I suppose coaxial cable, with a single conductor, alternates with the shield and with the shield connected to earth ground and there is no second wire.
By the way, I don't need to be convinced that you are an EE with whatever experience. To me, this is research and I will find a definitive answer that satisfies my curosity. Call me hard headed. And I defer back to my final statement in the last post. Anyway, this post was about cables being directional and not a dialog in electrical theory. They may never let me post again! Anyway, I am convinced that cables being directional is BS and ALL the EE's I work with are in agreement with that.

Bigtee  (Threads | Answers | This Thread)


08-28-02   Audioengr---well, i just had one of the ee's stop by and we ...   Bigtee

08-28-02   Bigtee wrote: "as i said before, you have the positive ...   Audioengr

08-29-02   Audioengr- i appreciate your information and trust ...   Bigtee

08-29-02   Here are some more tips for you, since i design wires for my ...   Audioengr

09-22-02   I had a breakthough, the arrows (directionality notation)are ...   Orbeck

09-23-02   Works for me....   Audioengr

10-12-02   Audioengr, if i may sidebar and ask a few general questions ...   Stehno

10-12-02   Stehno wrote: no, the ground is strictly for safety. it is ...   Audioengr

10-12-02   Thanks, audioengr.   Stehno


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