This is a 4 part video series for what I think is a great Emp , Lighting etc suppressor. Its cheap but can on,yu take one really big hit. lesser hits are ok but a bit one will destroy itself and save your equipment. Thats why its in a metal; box.

Part 1 of 4  

Part 2

Part 3

Part 4

E.M.P. –Lighting — Solar storm — Solar Flare- Coronal Mass Ejection – Protection for the home or on the go.
The Info comes from here.
Electromagnetic Pulse and the Radio Amateur – Part 1
QST August 1986, pp. 15-20, 36 Google it if the links go down

Part 1 appears in QST August 1986, pp. 15-20, 36 (http://www.arrl.org/files/file/Technology/tis/info/pdf/88615.pdf)
Part 2 appears in QST September 1986, pp. 22-26 (http://www.arrl.org/files/file/Technology/tis/info/pdf/98622.pdf)
Part 3 appears in QST October 1986, pp. 38-41 (http://www.arrl.org/files/file/Technology/tis/info/pdf/108638.pdf)
Part 4 appears in QST November 1986, pp. 30-34 (http://www.arrl.org/files/file/Technology//tis/info/pdf/118630.pdf)

Im building the power protector from Part 4 page 34 (Figure 15)

The Mov’s “Siemens S14k130” can be ordered from http://www.digikey.com/ for about .50 cents each