HY4B100W End-fed Balun Shortwave Antenna 4-Band Natural Resonance 7-14-21-28MHz Easy Erection without Antenna Adjustment
Tax included.
Specifications:
One balun
2.5 square vibrator 20 meters
20M outdoor drawstring, storage bag (not including feeder line)
Input power: SSB, CW mode 100W (PEP), FT8, AM.FM.SFK mode below 60W
Antenna erection:
The end-fed antenna installation requirements are very low, and it can work normally if it is more than 2 meters away from the ground, but in order to achieve the desired effect, it should be as high as possible and as open as possible. When the antenna is installed vertically, the communication is far away due to the low elevation angle, which is also omnidirectional The antenna, when installed horizontally, has a certain directivity due to its high elevation angle and relatively close communication. I personally like diagonal pulling, please refer to the figure below for specific erection method.
Antenna adjustment:
The antenna has been adjusted at the factory. If the resonant point may be affected by the feeder and the installation environment, please perform a standing wave (resonant point) test when you have the conditions for the antenna. If the resonant point may be affected by the feeder or the installation environment, use 7.05Mhz As the reference resonance point (that is, the lowest standing wave frequency point). This antenna uses the multiple relationship of 4 bands to realize the principle that a vibrator resonates 4 frequency points at the same time, so the resonance points of its 4 bands are linked. Assuming that the resonance point is at 7.05M, the other bands are about 14.250, 21.350, Around 29.00. If you want to change the resonant frequency, just change the length of the vibrator (the length of the antenna vibrator can be adjusted) without trimming. Or adjust according to your usual frequency without trimming.
Package Included:
1 x Set of End-Fed Antenna (Not included feeder line)
Details Picture:
