The antenna element is two meters long and 12 millimeters in diameter. At its top is an 80 µH inductor. The top capacitance consists of two flat profiles, each 1 meter long and 10 mm wide screwed onto a ceramic insulator. A good counterpoise should be ensured. The resonance can be adjusted with a clamp on the coil. Naturally, the antenna is narrowband...
... and works surprisingly well.