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I'm tring to find a source for some very thin teflon tubing but I'm not having any luck finding any up here north of the 49th. Anybody know of some sources up here in Canada (Vancouver).
In my search for the teflon tubing at the local outlets, it occurred to me that perhaps 1/16" or 3/32" polyolefin heatshrink could be used as a substitute. Pros- easy to find, plentiful, cheap, & even comes in colors!!
Cons-?probably lots! Any thoughts or advice?
Follow Ups:
I took about 4 lengths of teflon tape and rolled them into one. I used two of these to fill the gaps between the twisted pair. Worked great!
I've used 1/4 inch teflon wrap. It's not cheap, adds about $15 to the cost of a one meter pair of cables but it works and the cable remains flexible. The 1/8 inch is almost half price but I was concerned it wouldn't provide enough spacing. Link is below. Thanks to Jeff Wiseman for this tip
Thanks.
I built mine using braided polypropylene rope that I bought at Home Depot. I expanded the rope like a Chinese finger puzzle then ran the twisted pair of coaxes through the middle of it. This resulted in a fairly thick spacer that was a combination of polypropylene (dielectric constant almost as good as teflon) and air (better than teflon). I think spacing the shield relatively far off the twisted pairs is a good thing too. In any case the ICs sound great.
Interesting solutions. I will explore them all. I'm curious AIK, what size polypropylene rope seems to work best & what size shield? Kevin P, where do you get your neoprene hose-Home Depot? GWN,I think I've seen the teflon wrap or somthing similar, locally. definitely will check out. Thanks all
Vanman,I used 3/16" polypro rope, mainly because I had it. It was a bit smaller than optimal though. If you're buying the rope I'd recommend the next biggest size. I used 1/2" braided copper shield which was plenty big enough. There should be more than enough room for the bigger polypro rope.
Hope this helps.
Al Kirchner
Norprene is a brand name.. Sanoprene is the same thing. It has better working properties than Teflon (it is flexible and soft) and as a dielectric is pretty good also.
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