Re: [Elecraft] DIY Hard-drawn copper wire

On 2/11/16 3:13 PM, Bill Frantz wrote: (4) If you are breaking things, such as #8 copper wire, cover them with blankets to minimize the danger of having them snap through the air. (5) Keep everyone far enough away so flying wire won't hit them, or keep them in a closed vehicle. Those are

Re: [Elecraft] DIY Hard-drawn copper wire

> > p.s. I think it's cheaper and better to just purchase harddrawn copper or > copperweld wire. YMMV > It’s hard to disagree with this. I can just see myself with a 100’ of wire tied to my mailbox on one end, pulling the other end down the street on the bumper of my car — wait .. there

Re: [Elecraft] DIY Hard-drawn copper wire

Copper is ductile, not elastic. So pulling it will cause it to stretch but when it breaks it does not return to its original length releasing a lot of energy. It will simply separate at the point of failure, as others noted. Even so, I am careful any time I'm applying a lot of pressure to

Re: [Elecraft] DIY Hard-drawn copper wire

All true Ron, but remember that copper is only the main element in the alloy at hand. The one time you take something in safety for granted is the one time it turns on you. It waits... 73, Rick nhc Sent from my iPad > On Feb 13, 2016, at 9:47 AM, Ron D'Eau Claire wrote: >

Re: [Elecraft] DIY Hard-drawn copper wire

On Sat,2/13/2016 8:30 AM, Ken wrote: p.s. I think it's cheaper and better to just purchase harddrawn copper or copperweld wire. YMMV It's certainly good to see that you guys who have never done it know so much about how it's done. And copperweld is a VERY BAD idea. 73, Jim K9YC

[Elecraft] DIY Hard-drawn copper wire

In a recent post Jim, K9YC, suggested making hard-drawn copper wire for antennas by attaching a few hundred feet of bare copper wire to a tree or telephone pole at one end and to a bumper hitch at the other, then driving away very slowly until it snaps. That sounded like a very attractive idea

Re: [Elecraft] DIY Hard-drawn copper wire

But the real question is:   If the tree falls over, and no one hears it, did it really fall over, and did the wire snap? Sorry, I could not resist... -- 73's, and thanks, Dave For software/hardware reviews see: http://www.nk7z.net For MixW support see:

Re: [Elecraft] DIY Hard-drawn copper wire

Also...just in case...make sure the wire is longer than the height of the tree... 73, Henry - K4TMC On Thu, Feb 11, 2016 at 9:57 AM, Dave Cole wrote: > But the real question is: > > If the tree falls over, and no one hears it, did it really fall over, > and did the wire snap? >

Re: [Elecraft] DIY Hard-drawn copper wire

I have actually done this -- but I didn't drive until it broke. I just gave it a little stretch. And it wasn't no. 8 wire! Worked a treat, as our UK cousins say. 73, Vic, 4X6GP/K2VCO Rehovot, Israel http://www.qsl.net/k2vco/ On 11 Feb 2016 16:34, Dauer, Edward wrote: In a recent post Jim,

Re: [Elecraft] DIY Hard-drawn copper wire

Trees are quite strong. When we do demonstrations by breaking equipment during cave rescue classes, we use trees as anchors and a truck with an electric winch attached to one tree. Some of these things break at several thousand pounds force. (We measure the force with a load cell.) The

Re: [Elecraft] DIY Hard-drawn copper wire

Even the smallest trees have substantial strength, species dependent of course (some have no tap root and only surface structure). Bind LOW on the tree to make the pull closest to the anchor of the tree (the roots). Vehicle frames are much stronger than a piece of typical (for antennas)

Re: [Elecraft] DIY Hard-drawn copper wire

On Thu,2/11/2016 12:42 PM, Rick WA6NHC wrote: BUT one should move slowly to not shock load the wire or vehicle AND (in addition to the excellent advice given) the safe zone is any place further away than the total length of the wire plus at least 20% When we've done this, my partner has

Re: [Elecraft] DIY Hard-drawn copper wire

I try to not give Murphy any chance, ever, at all. Sometimes that actually works out. ;-) The tension that is suddenly released, has to dissipate SOMEwhere, the trick is to not be in the way when that happens. Copper, because it is soft, uses less energy to stretch, but ... hanging cloths

Re: [Elecraft] DIY Hard-drawn copper wire

From what I can find on the 'net, in my dad's metallurgy manuals, and a scan of my CRC the ductility of pure copper is 0.62. A piece of copper wire which is thoroughly annealed will allow stretching of 62% before it fails at the ductile-brittle transition. This transition point is