10-27-2008, 12:46 PM
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Join Date: Apr 2005
Location: Mojave Desert
I have one of those Alpha Delta Dipole Antennas; it covers 80, 40, 20, 15 and 10 meters, or better put it’s supposed to cover those bands.
I made a 1 to 1 Current Balun to feed the Alpha Delta Antenna, 8 or 9 turns or paired 12 gauge wire around a 2.4 inch Toroid Core from Amidon. I think this throw off the dipole design from the manufacture. As I needed to tune this dipole antenna for 20, 15 and 10 meters.
The original coil inductance can be measured on your MFJ Antenna Analyzer, just set the frequency to 80 or 40 meter band and duplicate the new coils measurement in uH.
Connect the coil leads to the anaylzer SO-239 and be Xl mode.
Or figure the original coils inductance in uH from a Coil Calculator from a search engine. Then make the new coils to have the same analytical uH as the original coils.
Anyway sounds like you are having fun with experimenting around and a walk to the park.
I noticed that the 40 meter band was very broad banded, and worked well. 80 worked ok, but the other bands I had to tune. Like to hear your results when done.
My antenna easily took 1000 watts PEP without catching fire.
Jay in the Mojave