Electronics Projects ----------------- Dynamic E. M. Field Wand

COMMENT??? Got A Question??? A Click on the Wizard opens a direct E-Mail Link to the Research Center. Technical questions or just want make a report, just CLICK the Wizard!

Refer to the above drawing while constructing your EMF Wand. Materials required are:

• Piece of 1/2 inch copper pipe 10 inches long.
• Small ferrite rod 1/4 inch in diameter about 3 inches long. (You might find one like that in an old junk AM radio as the antenna.)
• About 70 feet of #28 or#30 gauge enameled copper wire.
• 8 feet of two conductor shielded mike cable.
• 1/4 inch Phone Plug (OPTION: You may substitute another plug type to match the amplifier you intend to use the wand with.)
• RTV Sealant. DOW 732 or equivalent.
• Plastic tape (Scotch 35 or equiv.)
• 3 inch piece of #22 stranded hookup wire.

STEP 2. Wrap a single layer of plastic tape over the ferrite rod. This will provide a bed to lay the winding over. Cover the entire surface of the rod. The ends may be left exposed.

STEP 3. Wind the coil using the enameled copper wire. Leave about 2 inches of wire at the starting end to make your connections later. Windings should be in a single layer with each tightly against the other. Do not pull the wire so tight that it snaps. Begin about 1/4 inch from one end of the rod and wind the length of the rod until you reach about 1/4 inch from the other. The exact number of turns is not critical, however the more you get the more sensitive the wand will be. In any case you should get at least 100 turns on each of the two levels of windings. (200 total)

STEP 4. Wrap a single layer of plastic tape over the wire allowing the wire to extend from the tape so you can continue winding the coil.

STEP 5. Wind a second layer of wire back over the tape as you did the first. When you reach the end of the rod, allow about two inches of wire to extend then cut the wire from the spool. Wrap a layer of tape over the entire assembly.

STEP 6. Strip the insulation from one end of the shielded cable and expose the two inner conductors. Connect the two ends of the coil to the two conductors of the shielded cable. Leave the shield connection exposed for now.

STEP 7. Tape the connections making sure that they are covered and cannot short together or are exposed where they could touch the outside tube when the assembly is inserted later. Also be certain the tape and coil diameter is not so large as to not fit inside the tube.

STEP 8. Solder a piece of #22 gauge hookup wire inside the copper tube, Place it near the end of the tube.

STEP 9. Slide the coil assembly into the copper tube. Once it is inserted, solder the other end of the #22 hookup wire to the shield of the cable. Make sure that there is no possibility for a short between conductors, and then push the shield and cable inside the tube leaving only the cable to extend out from the end.

STEP 10. Fill both ends of the tube with RTV to seal the wand. Put it aside and let the RTV cure for 24 hours. The RTV will provide strain relief as well as prevent anything from getting inside the tube.

STEP 11. Connect the 1/4 inch phone plug as shown in the drawing. Once this is done the wand is ready for use.

Connect the wand to your recorder or amplifier. Plug a set of headphones in and monitor the output. When you turn the volume up you may hear a hum or other sounds. This is the result of an EM Field. By moving the wand in different positions you will be able to determine the nature and location of the field.

One of the first things you will find is that the wand picks up fields emanating from the sides of it rather than the end. Thus you will obtain best results by holding it sideways rather than pointing it at suspected magnetic sources. It is best just to use it and learn by experience. The angles are somewhat determined by how the field is generated as well as how the wand is positioned. Have fun!!!