It is not difficult to build your own. I have built a number of loopstick antennas using ferrite rods. I chose the Amidon Associates R33-050-750 rods.
I constructed these loops by placing a ferrite rod inside a piece of 0.5 inch pvc tubing slightly longer than the rod. I wrapped electrical tape around each end to center the rod in the tubing. Then I wound about 50 to 80 turns of wire (depending on the range I wanted) on the outside of the pvc tubing. I used some # 24 stranded wire stripped out of a length of CAT-5 cable for this. I brought the leads out to a capacitor, a 15 to 365 pF variable capacitor with any additional capacitance in parallel to cover the range needed. I used a NanoVNA to measure the inductance of the antenna I built at the frequency to be used, so I could calculate the approximate capacitance needed to tune to resonance. I have used such antennas in the range from 50 to 600 kHz. I found that they work quite well receiving WWVB and AM radio stations.
Zack W9SZ
On Sat, Aug 31, 2024 at 12:50?PM Roberth via <roberth.sjonoy=[email protected]> wrote:
And what are the options if I'm not able to make my own "small loop antenna"?
