A bonus picture here. The one on the left is a 3 foot in diameter loop.
Note: The little box at the bottom of the small one contains an air variable capacitor for tuning.
Compare it to the 5 foot in diameter loop on the right. ‘
I made a QRP CW contact with this mag loop from right where it stands in my drive way.
Home made cap clamps. The clamps are soldered to keep the contact resistance low.
This is very important with High Q antennas.
Russian capacitor. It is available at E-Bay for about $150
Where would hams be without PVC pipe!
This stand is made from 2 1/2 inch sewer pipe.
This is a fun antenna to build and use. I made my first contact with W9GY this afternoon on 20 meters. I used 5 watts, he used 10. RST out was 459, RST in was 579. The antenna was in my drive way in front of the garage that you see here. And Jeff was in Indiana. What a hoot! Making contacts on a home made antenna is great fun. The parts are readily available and with a little planning and shop time you can have a Magnetic Loop antenna to play with.
This is my second Mag Loop. The first one is 3 feet in diameter and covers from 20 through 15 meters. I’m planning another for 17 meters through 10 meters. Mag Loop calculator is available at http://aa5tb.com/index.html
Yahoo has Mag Loop groups that are very helpful to get you started. http://groups.yahoo.com/group/MagLoop/
Copper foil or strapping is available at http://stormgrounding.electrical-insulators-and-copper-ground-bars.com/copper-foil-2.html
If you’d like more information about Mag Loops, please feel free to contact me. [email protected]
73 De AA1IK