Air dielectric - it costs you nothing, but a little thinking.

Posted by cheap-Jack (M) on September 24, 2007 at 08:33:43

In Reply to: RE: You could flush the tube posted by Steve Eddy on September 21, 2007 at 12:06:31:

Hi.

It only took me a little thinking. I recall I later came across a 25-year-plus major brandname IC & cords maker in USA claimed using the similar tweak to provide air dielectric for one of its high-end products.

Ideally pure free air dielectric is the best, so bare wire is the best. But we need insulation against electric shorting. So the second best is to use porous materials, like cotton, silk or the like porous materials, but then we start to worry about metal tarnishing due to moisture & chemical pollution. It happens to bare copper, let alone Ag.

We need to take a compromise btween air & insulation. Teflon is the best
choice being an excellent dielectric & air impermeable, pretty flexible (use thin wall type), & pretty affordably available in various internal diameter.

Simply choose Teflon tubing (I only use PTFE UL 600V rated, made in Germany for my Ag cords) of internal diameters many times larger than the gauge size of the single Ag conductor. By using hot gun to remove the moisture inside the tubing & sealed up both ends of the tube/exposed Ag conductor ends, an air-tight air dielectric environment will be provided for the Ag conductor inside the tubing.

How come? At any time, the round Ag conductor is only in one point contact with the wall of the round Teflon tubing. So the conductor is virtually bathing the dry air trapped inside the tubing !!

Of course, the next task is to provide mechanical protection to the Teflon tubing to ensure the Teflon tubing maintains its round shape at all time.

c-J

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Follow Ups Full Thread

Topic - Polyolefin Heatshrink for Silver Wire - SRMcGee 13:53:59 09/19/07 (20)

What type of Polyolefin? - tvi 16:20:53 09/22/07 (0)

Watch out bare silver wires can tarnish quick! - cheap-Jack 08:23:32 09/20/07 (12)

RE: Watch out bare silver wires can tarnish quick! - Dawnrazor 08:27:37 09/20/07 (11)

Try the tweak I use as posted below. (nt) - cheap-Jack 08:57:14 09/20/07 (10)

I have used and made silver wire for years and . . . - John PA 21:45:19 09/20/07 (9)

RE: I have used and made silver wire for years and . . . - Steve Eddy 09:26:00 09/21/07 (0)

Not anybody lucky like you. - cheap-Jack 07:24:26 09/21/07 (7)

You could flush the tube - Cpk 10:59:26 09/21/07 (5)

RE: You could flush the tube - Steve Eddy 12:06:31 09/21/07 (4)

Air dielectric - it costs you nothing, but a little thinking. - cheap-Jack 08:33:43 09/24/07 (2)

RE: Air dielectric - it costs you nothing, but a little thinking. - Steve Eddy 09:08:01 09/24/07 (1)

Did I say "compromise" ? - cheap-Jack 11:40:15 09/24/07 (0)

RE: You could flush the tube - Cpk 12:20:27 09/21/07 (0)

RE: Not anybody lucky like you. - Steve Eddy 09:27:58 09/21/07 (0)

RE: Polyolefin Heatshrink for Silver Wire - Steve Eddy 15:40:00 09/19/07 (5)

Whut he said. - Poindexter 20:14:10 09/19/07 (4)

Hmmmnnn... - SRMcGee 07:02:29 09/20/07 (3)

NO, best insulation is no insulation. - cheap-Jack 08:53:54 09/20/07 (0)

RE: Hmmmnnn... - Steve Eddy 08:39:45 09/20/07 (0)

The issue is... - Russ57 08:20:19 09/20/07 (0)

Follow Ups

Air dielectric - it costs you nothing, but a little thinking. - cheap-Jack 08:33:43 09/24/07 (2)

RE: Air dielectric - it costs you nothing, but a little thinking. - Steve Eddy 09:08:01 09/24/07 (1)

Did I say "compromise" ? - cheap-Jack 11:40:15 09/24/07 (0)

Air dielectric - it costs you nothing, but a little thinking.

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