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What are the options around for coaxial cables using teflon and silvered-copper in its construction?The only one I could find was the DH Labs D-75.
Times Microwave has a rather stiff cable called Tflex 402 which is silvered copper (not silvered coppered steel as on many RG coaxials), but is rather hard to find in by-the-foot quantities.
Carlos
Follow Ups:
VH Audio Pulsar is made of pure AWG 28 copper with a clear teflon dielectric and silver-plated shield (return).It sounds excellent with good connectors.
IME silver plated wire sounds bright in most systems, while a silver plated shield adds the right amount of air on top.
For the price, Pulsar is a no-brainer.Regarding your four-braid cable, it worked for me (many moons ago).
I prefer pure copper (at least four nines), annealed and cryo'd, threaded inside loose teflon tubes. It sounds smmother and fuller than any silver-plated IC that I have tried.
Good luck
I never thought I would champion a coaxial cable for analog use until I found the Pulsar. The Pulsar's bass is *very* articulate, the treble is pristine, and the midrange is virtually uncolored. Soundstage, imaging, detail, and dynamics is first rate at it's price point, and better than many more costly IC's.I've read that Chris has some new non-coaxial single ended IC's making ready for sale.
from major cable suppliers at least that use a 75 ohm copper cable. Many will have a silver plating and many will use Teflon as the insulator in the more expensive designs. If you reduce the requirement from only Teflon to other suitable insulators then you will find many more options. I have found that the foamed PE insulation sounds as good and is as durable for practical purposes.
-Bill
There should be but there are not. Believe me I made a very thorough search on major manufacturers (Belden, Alpha, Dearborn) and they have absolutely no type that gathers silvered copper and teflon in a coaxial shape.The RG types that are silvered copper (e.g.: RG214) has no teflon dielectric. The ones with foam teflon, have no silvered copper. And then there are those that are teflon dielectric with silver coppered steel, not just copper.
There are probably other brands, but not major ones. And they charge a lot per meter.
Until now the D-75 seems the most reasonably priced, for around $12/m.
you can buy cable with the same performance for less. You don't need all three in one design. That's mil spec stuff and you can find that out there for that purpose, but it is either old and you get lucky or it's expensive. You shouldn't insist on that when even Belden says you don't need it for audio or video, digital or analog.
-Bill
Well, I don't really care for what Belden might be saying for audio. Have you tried their audio cables, consumer or professional? Their microphone cables are very poor and no serious audio place stocks any. Do they care? Apparently not.Even here, Jon Risch had to make a combination picking parts from Belden video cables to make an interconnect or speaker cable.
The major thing in discussion here is teflon + silvered copper in the coaxial world. This I will certainly insist on.
Jon did not HAVE to do anything. He chose to. Give Belden the credit they deserve for their work. Until you can hear or see a difference between the cables in question, insisting on particular materials without having humidity, temperature or stress concerns seems silly. Still you can choose what you like. I don't find it unlikely that you could hear a difference between a couple of unusual choices of cabling however I think that basing requirements of audio cables soley on materials before hearing them is counterproductive and purely speculative. That said, I have always had a preference for copper conductor cables over silver conductors and so I can see where you would perhaps tend to want to stick with one type of design that has proven to work for you. I believe that Jon would be the first to mention (second in this case!) that the variables in geometry of any cable that fit your materials specification would also affect your choices once you were able to actually hear them.
-Bill
Of course JR picked what he liked on what Belden had. But I can't give them too much credit for not having made a decent mic cable, like Mogami or Canare did.And I do can hear a difference on a few cables when they resolve music better. That has happened most on specific metals and dielectric, particularly teflon, which usually has silver-plated copper inside. The RG214 was also good, had no teflon and yes silver-plated copper.
My experience with pure silver was not that good, but I should try a thinner gauge sometime and perhaps purer silver.
Braided enameled copper (magnetic wire) also worked remarkably well. Doing a braid with teflon "a la Kimber" is also something I want to try, with wire-wrap.
The non-coaxial types with teflon and silvered copper I already have, so I wanted to make a comparison with a good and similar material coaxial. Then I will see how important the geometry is.
Humidity, temp and stress you can't control, but geometry and materials you can.
Carlos
"Doing a braid with teflon "a la Kimber" is also something I want to try, with wire-wrap."I tried that years ago. Didnīt sound as I expected. That geommetry is smart but the wire-wrap insulation adds a lot of grain. The Kynar may be a type of Teflon but it is too far away from PTFE. If you decide to go on I advise you to take some care braiding the three wires in a way each one contacts the others as least as possible. Or you could braid only two wires around a PTFE tube or a cotton thread, minimizing capacitance.
Regards
Paulo Simoes
"The Kynar may be a type of Teflon but it is too far away from PTFE."Of course I am talking of Teflon wrap, not Kynar. It takes the same to do it right.
The braid I am thinking of is four, not three wires.
Braiding around a cotton thread would be fine, as long as it's stiff enough not to crush.
Carlos
works as a spacer and remains sturdy but flexible. That allows for more near right angles at overlap points without adding to the cost or trouble.
-Bill
Sorry if I misunderstood you. Didnīt know about PTFE wire-wrap. In that case, youīve got my blessings :)Regards
Paulo Simoes
coax vs braid of the same materials. If the wire sizes are the same, it will restrict the differences to only cable geometry. In my area we have a lot of RF due to some nearby AM radio towers and being close to downtown there are also hospitals, taxi, police, etc. Shielded coax seems to be the way to go here.
-Bill
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