| AudioREVIEW's Forum Archives - Cables & Interconnects |
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|   Please, theory, physics, DIY, and afficionados only | Warren Warren
Nov 29, 2001 7:58 PM | | Okay, #1- ACTUAL AUDIBILITY is not to be discussed in this post, merely cable construction ideas.
#2- Please, unless you have some sort of experience, i.e. engineer, cable owner, do-it-yourselfer, please don't waste my (and hopefully others) time.
What I would like to do is either build or buy analog interconnects that I feel represent the best construction according to standard principles of transmission lines. Definining the audio range as 20Hz to 22Khz, I theorize that a good set of interconnects would be one or 2 pair of silver coated copper wire (pure silver ruled out due to cost constraints), wrapped in a double helix formation around a teflon or teflon/air core. The diameter of the core would be 4 times the diameter of the conductors. The wires would then be insulated, wrapped with foil, and a braid over the foil. Then, the whole works would be sheathed in a butyl rubber jacket. The interconnects would have to be gold plated, with a teflon dielectric. The braid sheild would be tied to the outer shell of one connector only. Does anyone know of a cable like this? Are there any recommendations on the size wire I should use? Are there any pre-manufactured cables of any brand that fit (or approximate) this construction? Please, serious responses only. |
| re: Please, theory, physics, DIY, and afficionados only | mtrycrafts
Nov 29, 2001 10:30 PM | | "What I would like to do is either build or buy analog interconnects that I feel represent the best construction according to standard principles of transmission lines. "
Why would you want to apply this principle at audio frequency? Are you planning on using miles of cable?
Second, which components have matched outputs to inputs?
"wrapped in a double helix formation around a teflon or teflon/air core. "
Why? What is this based on? What electrical principle?
"with a teflon dielectric. "
Why are you obsessed with teflon? Wnat signal gain benefits do you expect to get? At the 5th decimal place, it doesn't matter. |
| re: Please, theory, physics, DIY, and afficionados only | Warren Warren
Nov 30, 2001 4:38 AM | | Your comments are worthless, and will be ignored. |
| re: Please, theory, physics, DIY, and afficionados only | FLZapped
Nov 30, 2001 5:39 AM | | Well, why? Are you going to use miles of cable? Transmission line theory doesn't hold up very well below a 1/10 wavelength. Besides the fact that at audio frequencies coaxial type cables do not present a stable characteristic impedance. So how is this invalid?
Why won't you explain why you chose the construction method? How is that not a valid question?
Why choose teflon at audio frequencies? How is this not a valid engineering question? The stuff is niether cheap nor easy to work with.
If you were in front of one of our design review boards, they would ask these questions and probably a whole bunch more. So if your goign to work in the field of engineering, you need to get used to being grilled.
-Bruce |
| re: Please, theory, physics, DIY, and afficionados only | mtrycrafts
Nov 30, 2001 9:38 PM | | "Besides the fact that at audio frequencies coaxial type cables do not present a stable characteristic impedance. "
He hasn't covered that yet in class. Or, he just cannot understand it.
That impedance is terrible between 20 hz and 20khz:-)
"So if your goign to work in the field of engineering, "
LOL :-) He is trying for Jon's job:-) |
| re: Please, theory, physics, DIY, and afficionados only | Rockwell
Nov 30, 2001 9:09 AM | | Perhaps you should try putting your fingers in your ears, close your eyes, and say loudly "La la la la la la laaaaaa...!", so as not to learn anything. |
| "will be ignored" | mtrycrafts
Nov 30, 2001 9:35 PM | | Obviously not as you responded. |
| "will be ignored" | Eyespy
Nov 30, 2001 11:31 PM | | Maybe so, but I will definately not respond to your post pointing this out. |
| re: Please, theory, physics, DIY, and afficionados only | FLZapped
Nov 30, 2001 5:34 AM | | [according to standard principles of transmission lines]
Well, to start with, unless you are going to approach a 1/10 wavelength with them, I doubt you'll get transmission line theory to apply very well. Besides the fact interconnect cables do not offer a stable charateristic impedance over the audio band.
[2 pair of silver coated copper wire (pure silver ruled out due to cost constraints), wrapped in a double helix formation around a teflon or teflon/air core. ]
Why? Silver is only a couple percent better conductivity than copper and silver plating is almost useless at audio freuqncies for interconnects. You won't see any improvement when you consider that your pre-amp will be 100 ohms or less output impedance and will be driving an input impedance to the amp of 10 to 50 k ohms. Inductance of the wire certainly isn't going to enter into the equation here, nor is skin effect.
And why teflon? What do you possibly hope to gain from that?
[The diameter of the core would be 4 times the diameter of the conductors. ]
Why?
[Then, the whole works would be sheathed in a butyl rubber jacket]
Why this material?
[The braid sheild would be tied to the outer shell of one connector only. ]
Why? RFI problems? Ground loop problems??
[The interconnects would have to be gold plated, with a teflon dielectric]
What do you hope to gain by using teflon? It is a mechanical monster waiting to bite when used as an insulator in connectors that have captured pins in them, unless extreme lengths are used to ensure the parts are properly captured. Most manufacturers don't think of this. It's really too soft and has a tendancey to cold flow. So it really isn't suitable where you must capture a pin in it, even if you go to those extreme assembly methods.
You haven't even mentioned anything about the major contributor to an analog interconnect's performance, which is parallel capacitance.
If you use a good quality 75 ohm coax(but not because of it's impedance) with an all copper center conductor, you will be able to build an interconnect that will perform as well as any esoteric design you could possible come up with, with or without glod-plated-teflon connectors. As a matter of fact, if you look closely at some of the generic cables that offer audio and video cables in the same package, you'll probably discover that they are all made from the same stuff.
-Bruce |
| re: Please, theory, physics, DIY, and afficionados only | Warren Warren
Nov 30, 2001 9:18 AM | | Actually Bruce, I was hoping you would join in, and you made some very valid points (although there are some I would disagree with).
You yourself stated (quite correctly) that coaxial cable does not present a stable impedence across the audio frequencies. In fact, audio frequencies frequently exhibit characteristics in cables more similar to DC than to RF. This is why the double helix design. Of course, this is also why the teflon (or teflon/air) dielectric core. I do need some sort of solid core to wrap my wires around, don't I? Why teflon-1st, I would disagree with your point on cost. a length of teflon is MUCH less expensive as a cost consideration then using a pure silver wire, for example. It also has a good dielectric constant across a broad band. Why the 4:1 ratio? This is due to the turn radius of the wire around the core, keeping the positive and negative leads 180 degrees apart across the dielectric. Why not just go with 2 parallel wires instead, you may ask? The reason for the winding is because it is physically much easier to maintain a constant distance between the 2 conductors than a parallel arrangement in a cable that will be subjected to bends and turns. This also should reduce the parallel capacitance you mentioned above.
Why the shield? You already answered this yourself. While I may be able to reduce or eliminate ground loops through proper AC wiring and connectons, eliminating sources of RFI is a little trickier.
Why a silver-clad copper rather than straight copper when we both know full well that skin effect is minimal at audio frequencies, and that the difference in conductivity is also minimal? I'm glad you asked! This was not so much for the electrical properties, but due to the fact that I would like to use a silver solder to connect the wires to the interconnect. As I'm certain you are well aware of the battery effect of using dissimilar metals, and the fact that when you solder you are effectively creating an alloy, I felt that a silver clad cable would give me a superior electrical and mechanical junction.
The butyl rubber jacket is because it is an excellent insulator, as well as flexible. Why do I care about an excellent insulator at such low voltages (typically less than 2.7VRMS)? I don't, really. But it is also fairly inexpensive, readily available, and I can put a colored shrink wrap over it without worrying about adverse chemical reactions.
Thank you for your input! This is exactly the type of discussion I have been hoping to have here. Your constructive criticism is always welcome. |
| re: Please, theory, physics, DIY, and afficionados only | FLZapped
Nov 30, 2001 2:41 PM | | Warren,
I guess I still can't appreciate going through all that trouble with the double helix construction for the inner conductor.
While I can appreciate the use of silver as you describe, I have never seen any problms with soldering directly to copper, unless there was some serious surface contamination to begin with. HVAC guys have been doing it for years. I'd have to ask my brother-in-law what the actual amount of silver in his solder is, I can't remember what he told me the mix was last I saw him.
I suppose rubber is fine. Most heat shrink is non-reactive to most cable jacket materials as far as I've ever seen. There is also teflon shrink tubing available, but it ain't cheap.
-Bruce |
| re: Please, theory, physics, DIY, and afficionados only | mtrycrafts
Nov 30, 2001 9:44 PM | | ". I'd have to ask my brother-in-law what the actual amount of silver in his solder is,"
Very little, a couple of %, low single digit. |
| re: Please, theory, physics, DIY, and afficionados only | CHRIS8
Nov 30, 2001 10:02 PM | | I believe the silver content in solder used for air conditioning coils is in the 90% plus range(according to my shotty memory), but this is useless for most other applications as it takes around 5000 degress using a handheld MAP gas torch to melt it. Highest electrical solder with a usable melting point around I've seen is 4% I believe. |
| re: Please, theory, physics, DIY, and afficionados only | CHRIS8
Nov 30, 2001 10:17 PM | | oh, so I don't get flamed, i didn't mean it took 5000 degrees, less than 2000 will melt the high silver a/c solder, i was quotig the flame temp of what map gas tops out around, my error..so feel free to spare me
Boy, I miss the 'EDIT' feature from the old forum. |
| re: Please, theory, physics, DIY, and afficionados only | CHRIS8
Nov 30, 2001 10:48 PM | | For reference: 75% melts around 1700, 56% around 1000-1300, depending on the alloys. |
| re: Please, theory, physics, DIY, and afficionados only | mtrycrafts
Dec 1, 2001 3:37 PM | | Even at those temps, it would be interesting:-)
Solder is down around 300Deg |
| re: Please, theory, physics, DIY, and afficionados only | mtrycrafts
Dec 1, 2001 3:35 PM | | "as it takes around 5000 degress "
:-) LOL, I'd like to see the wire afterwards:-) |
| I am sure you are an RF guy now | Jon Risch
Dec 2, 2001 8:18 PM | | At least, that is where your only experience with things electronics seems to come from.
It is an old wives tale that teflon based coax will have the center wire drift or migrate. This has not been a significant probablility for years and years now. Perhaps if the coaxial cable was an 11 ga. center wire, where the wire was SO stiff, it would put tremendous pressure on the plastic, this might be an issue, but for audio sized coaxial cables, this is no longer the case.
As for teflon insulated RCA plugs, find me ONE reference or citation that says that the center pins will move, fall out, migrate, cold flow or any other such thing!!
Just one! (Of course it has to follow the same rules you apply to my evidence, that is iron-clad and certified by Einstien himself!)
OTHER plastics, such as certain nylons, PVC, certain other cheap plastics, can have these kinds of problems, but the pure PTFE or FEP often used for RCA plugs does not have this problem to any extent.
As for all the generic cables being made from the same type of coax stuff, hey, get a clue, it's all the same stuff, becuase it's the CHEAP stuff! They are not going to give you premium cables for free, or for cheap, they use the CHEAP STUFF! Why you claim, assume and tell folks it is good cable, without a "shred of evidence" is the real mystery!
Jon Risch |
| I am sure you are an RF guy now | FLZapped
Dec 3, 2001 6:55 AM | | [It is an old wives tale that teflon based coax will have the center wire drift or migrate.]
Never said anything about this, Jon. You having nightmares or something??
[As for teflon insulated RCA plugs, find me ONE reference or citation that says that the center pins will move, fall out, migrate, cold flow or any other such thing!! ]
OK, right off the top I don't have a reference. However, one could walk into a local amateur radio sotre, purchase a concentional RL-259, a PL-259 with a teflon center insulator and do a destructive test for themselves.
I suppose too, they could go ask one of over on one of the amateur radio newsgroups and ask the guys that hang out there.
[OTHER plastics, such as certain nylons, PVC, certain other cheap plastics, can have these kinds of problems, but the pure PTFE or FEP often used for RCA plugs does not have this problem to any extent. ]
So, what's good for the goose, is good for the gander, where is all you supporting data?
[As for all the generic cables being made from the same type of coax stuff, hey, get a clue, it's all the same stuff, becuase it's the CHEAP stuff! They are not going to give you premium cables for free, or for cheap, they use the CHEAP STUFF! Why you claim, assume and tell folks it is good cable, without a "shred of evidence" is the real mystery! ]
So Jon, where is your evidence that it is cheap??? What definition do you use? Where is your evidence for the converse?? Or is this just a scare tactic for the uninformed??
-Bruce |
| Some polymer information | FLZapped
Dec 3, 2001 7:32 AM | | This should answer any questions about the mechanical strength of Teflon, which is a registered trademark of DuPont, compared to other insulation materials....
http://www.efunda.com/materials/polymers/properties/polymer_cat.cfm?MajorID=FP
http://www.boedeker.com/ptfe_p.htm
http://www.boedeker.com/nylonc_p.htm
http://www.boedeker.com/acetal_p.htm
http://www.boedeker.com/peek_p.htm
http://www.boedeker.com/ilamp_p.htm
http://www.boedeker.com/ilamg_p.htm
http://www.techlib.com/reference/insulation.html
-Bruce |
| One other thing about teflon..... | FLZapped
Dec 3, 2001 9:10 AM | | http://www.national.com/rap/Story/0,1562,4,00.html |
| re: Please, theory, physics, DIY, and afficionados only | Mwalsdor@cscc.edu
Nov 30, 2001 9:56 AM | | WW -
While I don't fit the catagories listed, like yourself I'm embarking on the DIY cable route to better serve my new DHT amp. So while I have NO EXPERIENCE or education in this matter I have done much research, therefore my comments are theory-based and the context weighed given my disclosers or disclaimers.
You mentioned silver-plated copper. In my research, which includes speaking with a number of cable manufacturers its my understanding that silver-plated copper is NOT PERFERRED. That "the designer" is better served with either pure copper or silver or perhaps a hybrid of BOTH materials used discretely so to speak. It's also my understanding that pure silver can be had relatively cheap (120' for $60) and even very pure 22awg uninsulated Cardas .9999 solid core silver is available for .95 per ft thru Michael Percy.
In my research I've contacted a few cable DIY enthusiasts that have passed along helpful or informative details on the construction of the various cable designs attempted. This included why they chose a particular design and why some of the less successful designs failed, or failed to met their satisfaction. Like yourself, I was also consideing a "teflon air" cable but was advized that teflon interacts in a negative way, that is only realized when one "hears the cable" without teflon insulation. My DIY cable friend perfers a more natural material. He also said that the sheathing is principally a marketing consideration and not a performance consideration, that the "cables sounded better" without casing insulation. As far as size. Most of the single-ended enthusiasts recommended very small gauge wire; 22-36awg. Remember this is with a typical SET amp, one that pumps out 2-9wpc. Some "designers" suggest that the smaller the gauge the better, though they acknowledge that anything smaller tha 26 awg is difficult to work with. They also mentioned that snaking small gauge silver thru teflon is not EZ. I had personnaly settled on 26awg, but would try various gauges to test the theory, if only in my application.
What I'm considering is trying various design for bi-wire speaker cabling. There are a number of designs I had in mind including 22awg solid core unisulated Cardas silver 22awg wire insulated with a natural material for the top posts, and uninsulated Vampire cast copper 10awg "magnet wire" insulated in a natural material for the bottom posts. Some manufacturers feel that certain materials better serve certain freqencies, though my friend perfers All-Silver cables, as they sound less discontinious. I would forgo Cardas or Music Post spades or bananas for simply terminating with bare wire. Whether any or all of these designs improve apon my existing bi-wire cables, it should be fun&cheap trying them out!
MikE |
| Transmission line theory... | Monstrous Mike
Nov 30, 2001 10:19 AM | | Have you worked with Smith Charts or Maxwell's Equations or do you have any electrical engineering background? If you did, you would know that transmission line theory does not apply for audio frequencies unless you had a pretty darn long cable.
And even if you had a cable long enough, reflections and standing waves might occur, but you don't mention how this can be overcome (as per transmission line theory)or even what the detrimental effects might be. You fail to mention the input and output impedences of the devices as well as failing to mention your target characteristic impedence of your cable.
Sure, your proposed cable construction might work. But aren't there many other more simple, less expensive designs that would work equally well? I think so.
Face it. A cable is nothing more than a passive filter. Marketers throw in a couple of fancy technical terms and the next thing you know they have a better passive filter than the next guy. And we all know a better passive filter has to "sound" better, right? |
| Transmission line theory... | mtrycrafts
Nov 30, 2001 9:48 PM | | "or do you have any electrical engineering background? "
He has claimed to have and is working on his PhD, if you can believe this. |
| Transmission line theory... | Warren Warren
Dec 1, 2001 7:34 AM | | Smith Charts? Is that the funny looking round display on my, um, what do you call it? Network Analyzer? I think that's what this big machine with the picture on it is called. Gee, I just thought it was a really fancy O'scope!
Besides, isn't the most basic electrical definition of a transmission line the medium from which a wave travels from a generator/source to a load? Is wavelength mentioned ANYWHERE in this definition, or do you find fault with this definition to. I hope not, or all mom's tuition money has gone to waste. Of course, in a perfect world, the output impedence of the generator and the input impedance of the load would be identical, and the transmission line would be lossless. Then we would have no reflections, and no power wasted and dissapated as heat. Of course, since there is no lossless transmission line, there WILL be reflections and power loss. Isn't this what those Smith charts illustrate? Also, characteristic impedance, and SWR (Standing Wave Ratio) if I'm not mistaken. Of course, all of this is based against the theoretical (oops, there I go with Theory again) lossless transmission line. Again, correct me if I'm wrong. BTW, did you know that Dr. Smith went insane and eventually committed suicide? There's a little piece of electronic trivia for you. So, in effect, an audio interconnect IS a transmission line. Is not the line that brings electrical current to your home a transmission line? If you live in the US, odds are pretty high that you receive 60Hz AC. Wow, 60Hz! Sounds like an AUDIO frequency to me. Of course, I'm sure you know the formula for determining wavelength (please feel free to write me if you don't), and you KNOW how long a 60Hz wavelength is, don't you? Now, do you live close to a power station? If not, do you know someone who does? Is this distance more or less than a wavelength? To quote some of your colleagues, I would like to see some numbers! Better yet, let's see if Mtry can tell me how long a wavelength is at 60Hz. And what do these power lines use as their primary dielectric? AIR! Yes, that's why they are separated on the poles. Neat, huh? In fact, a cable should NOT be designed to be passsive filter, but rather to pass it's designed bandwitdh with minimal loss. Do you want to discuss Q? Do you know what that is? And, when you are ready (or maybe your little buddy Mtry), I will give you some integrals and transforms to play with.
This page is getting really boring. I came here hoping to have some discussions with some open-minded, well educated people and toss some ideas around, and maybe even get some new ones. Instead I find myself hounded by a pack of "chihuahua's" as someone said, questioning my every motive without making any positive contributions. I even respectfully asked only for people with something positive to contribute to respond, and look who pops up- a world full of critics with nothing better to do then try and make me look like a fool. Whether I do or not depends upon the reader of these threads, and at this point, I could care less what most of the people on here think anyway. At least there are some bright spots. Thanks to the ONE obviously positive post here from a DIY'er, I have a new direction to go in. So, I will listen to the puppies yammer, and just put more people on my "to ignore" list. |
| Transmission line theory... | mtrycrafts
Dec 1, 2001 3:46 PM | | Oh, please tell us about the power transmission cable and whys. Could it be that they are indeed transmission lines because of the distances involved? You think that may have something to do with it? Could weight and cost have something to do with lack of insulation, or perhaps the heat generated in those cables may melt it as well? How aboput the cables to your house? Insulated? Maybe safety is an issue and not on the pokes and towers? Keep on guessing andn trying out excuses.
Oh, how about the telephone cables? They are insulated, aren't they? And they do cover very long distances don;t they and maybe they are treated as transmission lines because of it, right? And compensate for it? I guess that also happens into your house? Or, is that just too short of a distance and doesn't qualify? Which is it? |
| Transmission line theory... | current&spacing
Dec 2, 2001 6:20 PM | | Insulated or not?
Please consider spacing between transmission lines and current carried by them. |
| Transmission line theory... | Eyespy
Dec 2, 2001 8:18 PM | | What user name do you usually post under? |
| Transmission line theory... | current&spacing
Dec 3, 2001 5:09 PM | | homo-sapiens var. |
| Transmission line theory... | FLZapped
Dec 4, 2001 7:17 AM | | [Transmission line theory...
Insulated or not?
Please consider spacing between transmission lines and current carried by them. ]
Transmission line theory won't help until you have enough electrical length to begin with.
-Burce |
| Transmission line theory... | BFIELD
Dec 4, 2001 9:49 AM | | (Transmission line theory won't help until you have enough electrical length to begin with)
Bruce, what do you mean "electrical length"?
What happens when wires are too close to each other? |
| Transmission line theory... | FLZapped
Dec 4, 2001 11:42 AM | | The distance between the wires, will affect the characteristic impedance, however, you need to be over 1/10 of a wavelength at your frequency of interest in order for classical transmission line theory to hold up. Until then, the circuit just looks like ordinary components connected together.
For example, one wavelength at 500kHz (a little below the bottom of the AM broadcast band) is 1928 feet, 10% of that is 192.8 feet. At 50kHz you are 10 times longer and at 5kHz, you are 100 times longer.
-Bruce |
| Serious Reply | Jon Risch
Dec 2, 2001 8:07 PM | | There are several problems with what you propose.
Silver plated wires are generally conceded to not sound as neutral as pure copper or pure silver. They tend toward a brightness, or a forward sound in the very best instances. This has been found time and again by those who have experience with audio component evaluations. So these would not necessarily be the best choice.
Pure silver is not as expensive as you think, see:
http://www.geocities.com/venhaus1/diysilverinterconnects.html
these are pretty close to what you propose, except they use pure silver wires, and have no shielding.
Another point is that wrapping a foil shield (or any shield) around the twisted wires very close to them will have the grounded shield TOO close to the EM fields of the wire pair, and cause sonic problems (my personal experiences confirm this). In my DIY notes, I strongly recommend spacing the shield out away from the wires using additional high quality insulating material.
A homemade foil shield would be hard to assure that it was electrically terminated, even the commercial designs have problems at times, it would be VERY hard to wrap and make contact that would not cause more problems than the foil would help with. Worse case, the foil could become an antenna!
If you wanted better coverage than a homemade braided shield offers, double up on it, using HS or teflon plumbers tape to insulate them from one another. The spacing will actually help increase the second shields effectiveness. Connect the inner one with a 0.01 uF disc ceramic cap at the load end, hard connected at the source end, the outer shield connected hard at the source end only.
Note that the center insulating material would be critical to maintain highest quality, and it is hard to get anythig other than teflon rods or tubing, and these are very stiff. There is a thing called gasket seal, sold by McMaster Carr, that is available in foamed teflon, but it is quite expensive, and has a minimum quantity buy required PLUS S&H, etc.
See:
http://www.mcmaster.com/
Jon Risch |
| Serious Reply | Warren Warren
Dec 3, 2001 4:43 AM | | Thank you for your advice! This is exactly the kind of information and discussion I was hoping to find here. I had not realized that silver wire was much less expensive than I had previously thought, as it would have been my preference to begin with. Also, a layer of insulating material between the each sheild and the conductors goes without saying, but I suppose I should have said it anyway. Thanks for your input. What I'm really hoping to find is that someone already makes an interconnect similar to this, as I don't have a lot of time to build them myself, at least at the moment. I barely find the 10 minutes a day to stop by this board. Thanks again!
Warren |
| Serious Reply | FLZapped
Dec 3, 2001 7:36 AM | | [Silver plated wires are generally conceded to not sound as neutral as pure copper or pure silver. They tend toward a brightness, or a forward sound in the very best instances. ]
Another claim you have yet to prove, Jon.
[Another point is that wrapping a foil shield (or any shield) around the twisted wires very close to them will have the grounded shield TOO close to the EM fields of the wire pair, and cause sonic problems (my personal experiences confirm this).]
But as an engineer, what data do you have that supports this?
[using HS or teflon plumbers tape to insulate them from one another. ]
But won't that adhesive used be a major source of sonic trouble, it is after all, by you own standards, a contaminent, right?
-Bruce |
| Serious Reply | Jon Risch
Dec 3, 2001 2:40 PM | | Are you for real?
[ "Another point is that wrapping a foil shield (or any shield) around the twisted wires very close to them will have the grounded shield TOO close to the EM fields of the wire pair, and cause sonic problems (my personal experiences confirm this)."
But as an engineer, what data do you have that supports this? ]
Aside from my empirical experiments and results, I have EM field simulations that also show the fields extend past the crease of the two wires, and should be spaced away to avoid distorting the fields. Distort the fields, and you distort the signals.
See:
http://www.geocities.com/jonrisch/emf1.htm
and 2, 3, 4, etc.
[ "using HS or teflon plumbers tape to insulate them from one another. "
But won't that adhesive used be a major source of sonic trouble, it is after all, by you own standards, a contaminent, right?
I currently recommend a thin walled polyolefin HS without any adhesives, the polyolefin is clsoie to polypropylene in quality.
The teflon plumbers tape has no adhesives either.
Jon Risch |
| Serious Reply | FLZapped
Dec 3, 2001 2:51 PM | | [Aside from my empirical experiments and results]
So now we're back to a testimonial.
[I have EM field simulations that also show the fields extend past the crease of the two wires, and should be spaced away to avoid distorting the fields. Distort the fields, and you distort the signals. ]
Again, common knowledge, however, here is nothing that suports the idea that there is an audible degradation of the signal. So now we're back to speculation.
-Bruce |
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