Amateur Radio made in Italy
Antenna plans, Antenna analysis and desig. Review of tested antennas and online projects
This is the antenna for you guys who want to get on HF effectively, and haven’t too much space or cash to throw around. Actually, it’s a design from ZS6BKW (aka G0GSF), similar to the G5RV, but it actually resonates on five bands, (well 6, actually) and doesn’t rely on a tuner (ATU) to make…
The following diagrams and tables show some simple 1:1 and 4:1 baluns for use between 1.8 and 30 MHz using twin transmission lines made from enamelled copper wire (ecw). The bifilar windings have been adjusted (spacing) to produce transmission lines with Zo of 50 or 75 ohms as required for best matching. These designs should…
Article by Charles Greene, W1CG My 4:1 current-type balun is wound on a FT-114-43 core. The FT-140-43 is a little easier to work with, and maybe the FT-140-77 would cover 160-10. This one is reasonably flat from 4.5 to 35 MHz but drops off a little at 3.5, 40-ohms with a 200 ohm resistor on…
A plan for HF Log Periodic Antenna working 10-20 meters band by VA2PHI Pictures originally available at http://hb9tmw.free.fr/EuroNet/HTML/loghf.html
A magnetic loop for 40 meters band
GM4XRF Magnetic Loop antenna project
Sardine Can Antenna. is a BiQuad or Bi circle – wire length each side (8 x 1/4 waves ) 31 mm Sardine cans have quite standard dimensions around the world, although the oval one shown here is lightweight aluminium & does seem (perhaps by chance ?)to have enhanced directivity compared with more normal steel Canadian…
Article by N9RET THE INDOOR SPIRAL DIPOLE Since well before getting my ham ticket in 1993, I had been interested in maximizing my antenna advantage within the limitations of my small living space. I would experiment with different arrangements for SWL, Scanner, AM/FM/TV and 11m antennas, mostly within the cramped confines of the attic of…
Today I’ve taken some time to test my latest portable antenna, the Buddistick. By using an MFJ-269 antenna analyzer I’ve tried to find the main tuning keys for this small multiband antenna. I’ve been able to find an excellent SWR and Impedance setting for the 20 meters band, but I’ve also learned that tuning this…
Here a plan for a Morgain Antenna for 40 and 80 meters band. This dualband antenna similar to a folded dipole permit to operate low bands by using a very limted space.