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Hi All,I would like to make some DIY calbe lifters/elevators instead or just using something like inverted ceramic cups or electrical insulators. I want to make something which looks decent but works well and want to try a design such as the RSA Risers:
- From the pictures and descriptions am I correct in assuming it is simply a solid wooden base, with two solid wooden 'colums' glued on with heavy duty wood glue, and a non-dialectric string in between?
- Are there any other construction/material considerations which may be significant to their performance?
- Lastly, what can I use for that 'non-dialectric string'?
Follow Ups:
I made some and used teflon tubing instead of string or briaded teflon tape. Looks neater and was much easier to fasten to the posts.
Good luck with yours.
You could use something like a Teflon string that plumbers use.
Teflon tape is sold to wrap around pipe threads in plumbing supply stores. It is inexpensive. You can braid three strands of tape to make a string, then braid three of these to make a cord that will support even heavy cables without tearing apart, and provide some mechanical damping.All materials have dielectric properties. Common insulators such as poly-vinyl chloride (PVC) have a nonlinear response to electric stress. When used in capacitors, or in service of audio gear where the signal's electric fields are present, a particular type of nonlinear behavior, called "dielectric absorption," causes a smearing of the sound.
It is not clear how much effect a couple of small cords used in cable lifters such as those shown would have, but Teflon is probably the best synthetic material. Jute cord could also be used, but it would absorb moisture.
There is a guy who sells Kevlar string. Kevlar has the advantage of strength in very small sizes.
Here is a place that you can get the kevlar (Aramid) for $8. Use the main strings...they are kevlar.
Thanks Al!!I like the braiding idea because it really gives one some degree of control of the end product.
But, I was talking about an actual string of teflon that they sell...see the link.
Stealing your idea, one could easily braid these strings, and not have to worry about...creepage...the strings are pretty tough, but a single strand might creep. I don't think that 3 would!!
Also, I have used these strings in lieu of tflon tubes to make some interconnects where the conductors wrap around the string at near 90 degree crosses...it worked great!!
- http://www.cornerhardware.com/item_226601/Plumbing/Faucet-Repair-Parts/Stem-Packing-Bonnets/Wm-Teflon-Packing-String.html (Open in New Window)
When used in capacitors, or in service of audio gear where the signal's electric fields are present, a particular type of nonlinear behavior, called "dielectric absorption," causes a smearing of the sound.If dielectric absorption's behavior is nonlinear, why is every model for dielectric absorption a linear model rather than a nonlinear model?
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I've used it to elevate cables + twisting it into string works just fine. no need to braid.resonance is another issue of concern with strings + the tention of the string can be a factor there.
cotton and nylon also work very well. dielectric is a small concern, since point of contact is minimal. if you're using cat five, or similar speaker cables, try tying the string to just one or two of the conductors in the braid, then hanging them...
just bought 1M' of Cerrocord 'Super Enhanced' Cat5e at Lowe's to re-wire a pair of speakers (was using cryo'd nordost Flatline w/4 conductors). The Cerrocord has 4 twisted prs. of 24 ga. OFC w/teflon insulation they rate for 350 MHz. Am using one run for each conductor. What should I expect to hear ?
is this for speaker cables, or internal hook up?if you are doing speaker cables, I would try something along the lines of CrisVH's recipe. the full blown 27 pair version may not be necessary...
ex.) I use an 18pr version. to that, I've added a twisted pair of belden 1506 cores, sort of 'helix' style around the bundle. (not to suggest this as a recipe)sound? c5 ususally makes for a 'full' sounding cable imo; not overly bright. I have no exper using the enhanced wire.
Teflon will continuously creep under stess.
not really...I've had cables suspended by teflon 'string' for a year or better. It may creap a little, yes..but definately settles in at a certain point; not continuous by any means.
It works well, though I prefer/use non waxed dental string.
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A lesson for the wise; Never throw ANYTHING away..
http://www.polymerplastics.com/fluoro_tefa.shtml
Is that a wire?
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