As a hobby, amateur radio has long been encouraged to experiment with whatever you might have on hand.when [Tom Essenpreis] Want to use his 14 MHz antenna outside of his design frequency range, he knows he needs an impedance matching circuit. The most common type is the L-Match circuit, which uses variable capacitors and variable inductors to adjust the usable frequency range (resonance) of the antenna. Although inefficient in certain specific configurations, they are good at bridging the gap between the 50 ohm impedance of the radio and the unknown impedance of the antenna.
Undoubtedly looking for parts in his trash can, [Tom] Get hacked together A variable capacitor and inductor, using ferrite rods from AM radio, hot glue, enameled wire, copper tape and some extra 60 ml syringesYou can see that he grinds off the center of the plunger to make room for the ferrite rod. Wrap the outside of the syringe with a magnet wire, the arrangement of the ferrite can be adjusted by the plunger, and the characteristics of the components can be changed to adjust the circuit. [Tom] According to reports, he was able to use his newly produced tuner for live streaming, and we are sure that he likes to use his improvised equipment.
If you don’t like amateur radio, then maybe we can attract you with this syringe-based rocket, syringe-driven 3D printed drill press, or vacuum syringe-driven dragster. Do you have your own hacker to share? In any case, submit it to the prompt line!