1. create a new document (regular sig size: i used 350x90 pixels)
2. fill bg with white and draw diagonal lines using a round brush till you get somthing like this

3. go to Filter > Stylize > Find edges
4. repeat step 2 and then press ctrl+F do this up to 4 times, or till you get somthing like this

5. go to Filter > Distort > Twirl, use and angle of 200
6. go to Filter > Blur > Motion Blur, set angle to 45 and distance to 40 now you will have somthing simular to this

7. Duplicate the layer and go to Filter > Pixelate > Mosaic, set cell size to 8
8. go to Filter > Sharpen > Sharpen and then press ctrl+f, set blendingmode to soft light and merge down
now you got yourself a pretty cool techish gradient
this is what i got:

pretty easy huh?