ZS6BKW 3,5-28

Product detailed description

ZS6BKW dipole powered by 450 ohm double line.

Mounting for hanging by the center piece or by the ends of the arms.
not recommended for CU-PE version

The ZS6BKW antenna, when hung level at 10m, has very good radiation patterns compared to a half-wave dipole for a particular band.
On the 3.5 and 7 MHz bands it radiates similarly to a half-wave dipole.
On the upper bands from 14 MHz upwards it is directional.
The 14 MHz band is sharply directional in two lobes and has a gain of about 3 dB over a half-wave dipole at the same height.
The 21 MHz band has 4 radiating lobes, the gain in a lobe is the same as a half-wave dipole at the same height.
The 28 MHz band has 4 main lobes, there are significant minima outside the lobes, the gain in the main lobes is 3dB compared to a half-wave dipole at the same height.
In a small space it can also be compromised by mounting as a kinked dipole at 10m above the ground, the horizontal section is 2x7m long, the ends of the radiator then hang vertically down.
On the 3.5 and 7 MHz bands the radiation pattern does not change.
The 14 MHz band radiates similarly to a 1/4 vertical, compared to a dipole it has about 6db less gain than a half wave dipole at the same height.
Better radiation parameters at 14 MHz are obtained by bending 2x10m horizontally and the radiator ends vertically.
The 21 MHz band has a similar radiation pattern to a half-wave dipole at the same height, the gain is 2.5 dB less.
The 28 MHz band has 4 radiation lobes, the gain in a lobe is about 1.5 dB less than a half-wave dipole at the same height.

Technical data:
- 3,5-28 MHz bands
- arm length 2x13,75 m
- tuning by antenna tuner
- antenna cable according to variant - CU-PVC, CU-PE, CU-HD
- 450 Ohm double line
- double line length 12,2 m
- if a coaxial cable will be connected between the tuner and the double line, it is recommended to connect a 1:1 balun between the double line and the coax
- weight 1.1 kg (with CU-PVC cable)
- attachment for hanging

Can be manufactured with any length of twin line on request.
Increase the length of the twin line - put the desired amount of increase meters of the 450 Ohm twin line in the cart.

Example of connecting a 450 Ohm transmitting double line to a MINI LL balun - transition between double line and coaxial cable.
The balun is not included in the antenna, it is ordered separately.