Step 2: Tap and Bash

Short sharp bends can be gently tapped out aginst the benchtop with a hammer, the copper will easily yeild. The wire should be rolled during the tapping. Larger severe bends can be straightened by smacking down on the wire with the edge of the wood block or hitting the block with the hammer. You do not want to flatten the wire. Once the severe bends are smoothed out, clamp one end of the wire to the benchtop and rub the block, applying downward pressure, from the center of the wire to the loose end. The wire will quickly become hot, so it is necessary to unclamp and roll the wire frequently, otherwise it will curl. Clamp the other end and repeat the process. It will take a few minutes, but the wire will become straight. The block might work better if it had a shallow V groove in its bottom to run along the wire, but the plain block works so well that I have not bothered to try that.
<p>Thanks for the tutorial! Using this to make a yagi wifi antenna but need to strighten out 14ga wire. This did the trick!</p>
Why Not just put One end of the Wire in a vise, clamp a pair of vice grips/pliers to the other end, and pull the wire taunt and hit the vice grips with a hammer. The section of wire between clamping sections will be straight...
Yes, this is easiest and fastest. I don't like the idea of spinning it. It would do internal damage. Why hit the pliers at the end though?
I really like this and your other articles about the GH antenna, especially the bending jig. One way I learned to straighten copper wire from a guy I worked with is by stretching. You can grip short lengths between two pairs of pliers or clamp one end in a vise and the other end in pliers. You don't need to stretch much, about 1-5%. You COULD anneal the wire afterwards by using a welder's trick. Build up a layer of carbon on the wire with a butane lighter and then heat the wire with a propane torch until the carbon is completely consumed. That way you know it is hot enough to anneal the wire.
The unpatented Gray-Hoverman antenna designs are available for anyone to use be they commercial or otherwise.
You can also straighten the wire by clamping one end in a vice, and connect the other end up with a drill. Pull the wire tight, and turn on drill. Wire will turn, become straight after a few turns. Works great for #6 wire and smaller, Saves time, rolling, and provides more strength for the wire.
Please see that: <a href="https://www.instructables.com/id/An-easy%2c-cheap-and-efficient-way-to-straighten-and/">https://www.instructables.com/id/An-easy%2c-cheap-and-efficient-way-to-straighten-and/</a><br> <br> <br>
My favourite way is to clamp one end in the vise, and the spin it with the drill. Straightens wire out quickly and easily.

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