Description:
This antenna originally came from abroad, and the description of this antenna abroad: It is widely used in military, water conservancy and other emergency communication. The antenna is concealed, easy to erect, does not need to be debugged, and does not require a day adjustment. It can be at 1.5-30mhz. Short-wave full-length work, 0-500 km without blind zone, effective distance and inverted v antenna, effective communication within 1000 km. Friends who can`t go up, because it can be erected in the roof, balcony, window sill, field, etc., and can be erected in various forms, horizontal, inverted v, triangle, frame, serpentine, folding, window, etc., and it is invisible erection. This antenna is very convenient to set up. It can be set up in 1 minute for 1 person, and the antenna does not need to be debugged. The standing wave from 1.5mhz--30mhz is very ideal. There is no strict requirement from the ground. 0.5m above the ground. The above can work. Recently, many HAM friends, feedback back, HF20A tilted 10 degrees in frame-type horizontal, the communication effect is very good. Particularly representative is the BG7YB (Hainan Haikou) triangular window obliquely pulled down to the big tree downstairs, which communication effect is comparable to the short wave Yagi, the sound is loud and full, the signal is just, within 1000 km, thunder-like signal! Extraordinary!
Specification:
1. Maximum power: 1000W, average power: 50W 2. Working frequency: 0.5-30MHZ, SWR<2.0 3. Standard vibrator: 20 meters 4. Vibrator material: 1-1.5mm multi-strand copper core wire 5. Stainless steel ground nail: 2 pieces (self-provided)
Actual installation prompt 1. The roof is fixed for a long time. It is not necessary to use the ground anchor when installing. Connect the two tail ends of the antenna directly with one wire to connect the two tail ends, or directly connect the two tail ends directly. SWR Ideal, simple and practical. (The basic condition for the operation of this antenna is that the two tails must form an indirect or direct loop to work) 2. In actual outdoor use, if the ground anchor is not in good contact, the antenna will not form a loop, and the SWR will be high. You can pour water to the ground anchor to create a good circuit for the earth to lower the SWR. If the ground anchor cannot be used in the rock area, the two tail ends of the antenna can be directly connected and used to form a triangle and other variant shapes to work. 3. Generally, the height of the antenna will affect his radiation efficiency and distance. Generally, the antenna is a little higher, the angle is larger, the radiation will be better, the distance will be far, the blind zone will be larger, the installation will be lower, or the angle will be smaller. The radiation is almost the same, the communication distance is close, and the blind spot is less. 4. The length of the vibrator has little effect on the SWR. In theory, the longer the vibrator, the higher the radiation efficiency. 5. When using for long-term fixed use, it is necessary to do anti-rust treatment of the screw. It can be applied with butter to prevent the screw from rusting and waterproof (waterproof inside the antenna part and cause damage)
Package Include:
1 xFull-Band Blind-Free Antenna 1 x 20M Cable 2 x 1.5M Cable
Details Picture:
