Reply To: Windomka

#12202
OM0AAO (OM0A)
Participant

Hi,

It would be my pleasure, if the councils are helpful. Maybe I'll see a QSO with you, hi. The toroid for the FD-4 balun can be obtained from Martin Karasz, or a balun or the whole antenna, for example at Jirka OK5IM. A suitable toroid seldom rolls in a drawer… and bad material would adversely affect the characteristics of the antenna.

Z-mach is an excellent matching circuit. Powering the ladder is a bit problematic, whereas it needs to be made of very high quality due to bending (from the center of the antenna down, then to the side and up to the shack). It would be easy in the case of a shack on the lower floor.

The decision about the antenna itself is usually made by a radio amateur based on feeling. For example, I have a bad experience with HB9CV and I prefer antennas with higher impedance, ideal with impedance 50 ohm at the power point (1/4 vertical, OWA yagi, quad). But they certainly are radio amateurs, who have the opposite experience.