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Hi all,I'm constructing a new set of ICs using a variant of ChrisVH's fine silver IC recipe and was wondering...
Has anyone used a cloth tape like 3M Medipore or Durapore cloth or silk tape in lieu of Teflon tape? I'm thinking the fabric tape would have an advantage in that it's more flexible and the natural fibers would be better dielectrically.
Follow Ups:
I use a few different materials to wrap cables. For example carbon fiber tape works well. Another excellent material to use is E.A.R. C-1002 in a .015mm thickness. If offers very neutral sound without the added coloration usually associated with vinyl material.
Interesting choice, thanks for the suggestion, Alan. TechFlex also offers a carbon weave that looked like it was worth trying.I may try CF in a later build, but I'm really going to hold with a cotton or silk wrap with this one. Thanks though.
So, the EAR Isodamp is interesting too for a different reason. What was your thinking behind using it? Physical vibration damping as well?
If you are talking about the silver mylar techflex, don't waste your time. Better off wrapping the cable with Stillpoints ERS material.EAR C-1002 does not block physical vibration. It blocks frequency caused by materials or exterior harmonics. In other words, whereas vinyl and rubber will resonate at a lower frequency causing a boost in the lower octaves, C-1002 is flat from 50/60Hz on up. So instead of a cable that jacks up the bass you are left with a cable with superb top and bottom extension and inner resolution. This is a great method to lower the ringing caused by cable shielding.
cable shielding cause ringing? What do U mean by "ringing" and what property of the shielding would cause this?Confused,
Cables that are long compared to the wavelengths of the disturbances on them can act as resonators. Like any other resonance phenomena, the basic requirement for an observable oscillation is underdamping: the dissipative path for energy is less available than the pathway(s) of storage and return.Cables that resonate are those with low resistive losses and impedance mismatches at the ends. Unfortunately, this describes just about all audio cables. These cables are short compared to audio wavelengths, but, doubly-unfortunately, the radio frequencies at which they do resonate interact with the audio signal through intermodulation distortion.
Cables resonate in modes that have to do with the number of conductors and their geometry. Simple coax has two basic types of modes: normal and common. A shielded cable has more types. One type involves the shield versus all other conductors. This is what Alan means by the shield "ringing." Even if the shield were to be connected to the audio ground wire at both ends (not recommended for other reasons), it would still support a ringing mode from end-to-end, and that mode would affect the audio in many circumstances.
So, "cables that resonate are those with low resistive losses and impedance mismatches at the ends". As you say, this describes just about all audio cables!! :-((How does one create an impedance MATCH at the ends?
Regards,
The common design approach for audio interfaces is low impedance in the source and higher impedance in the load, with negligible power loss in the cable. The high resistance Van Den Hul interconnect cables are a notable exception. The common approach guarantees mis-matched impedances and resonant behavior in the cables unless other damping measures are employed.Since the resonances are in the UHF band and far away from the audio band, it is possible to provide damping through an old trick called "dynamic loading." This approach loads the cables with resistors and uses capacitors in series to prevent the resistors from drawing power from the audio band. This is how Walker Audio High Definition Links work for speaker cables.
The complex behavior of shielded interconnect cables presents significant challenges for damping resonances, and the sizes of the connectors make DIY dynamic loading difficult. This is all I'm going to say about the technology, as I do have some information that is proprietary to others. IME there is considerable audio benefit to damping electrical resonances in cables, and I believe that a large part of the "synergy" of cable matching to audio gear has to do with differences in resonant behavior among cable designs.
Check out some of Al Sekela's posts as well here and on Tweaks about standing waves in cables, "ringing", etc.
to the cable? I have some of this that I used over microsorb to shock-mount my transformers (at your suggestion) but I don't recall the material being self-adhesive. Do you use some type of glue?
I use a single layer of teflon tape over the C-1002. ERS is added over the teflon tape.How did damping the transformer turn out? I love the results on my power transformers and ac outlets.
of the DIY Dac. My first component-level project. I plan to shock mount the S&B transformers in my TVC on microsorb and EAR paper as well.Regarding these diy pulsar ICs, you'd recommend:
- layer of EAR C-1002
- one layer of teflon tape
- layer of ERS paper
- final layer of teflon tape (build up to diam. of connector
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