Tips:

The K-180WLA enhanced version has a small ring with a diameter of 68CM and a low battery indicator is added. The 2023 new version of the preamplifier has replaced the imported RF amplifier with better parameters and lower noise figure (non-low-end video amplifier IC), higher receiving dynamics and signal-to-noise ratio, lower noise figure, and can withstand -10DBM signal strength Unsaturated, the feeder is upgraded to LMR100 96-braided pure copper densest mesh plus aluminum-platinum double-shielded feeder and K-180 customized ultra-low loss feeder 112 braided pure copper densest mesh plus aluminum-platinum double-shielded feeder for better shielding loss Smaller, feeder SMA males replaced with anti-extraction pins. The new version of the preamplifier adds the FMDX HF switch to adjust the FM band gain (the FM band gain is reduced in the FM strong signal area, and the HF band gain is increased, and the new version of the feed box has three levels of gain adjustable). All original design and manufacture! Feeder 5 meters and 10 meters are LMR-100 feeders, and more than 15 meters (including 15 meters) are K-180 customized ultra-low loss feeders.

Receiving effect video (copy the link to the browser to open and watch):

https://v.youku.com/v_show/id_XNDU0NzYzMTE1Mg==.html

https://v.youku.com/v_show/id_XNDUzNTk2ODU1Mg==.html

https://v.youku.com/v_show/id_XNTEwNzY4Njg1Ng==.html

K-180WLA installed on the first floor indoors and outdoors on the fourth floor roof receiving effect comparison video

https://cloud.video.taobao.com//play/u/13412887/p/1/e/6/t/1/369064950241.mp4

Must read before buying:

What kind of radio can be used depends on which bands your radio's external antenna port supports. Make sure your radio has the corresponding band. It is best to connect an external 50-75 ohm low-impedance input port. Only the pull rod does not have an external antenna for the corresponding band. The radio at the input port cannot be used normally (the radio with 300-500 ohm high impedance external antenna port such as old-fashioned electronic tubes, binding posts and terminal clips cannot be used normally), remember! The reception effect is a standard that cannot be quantified. Here we must emphasize that the role of the antenna is to improve the reception effect and increase the signal-to-noise ratio. The only way to solve the poor reception indoors is to install the antenna outdoors. The window or the window sticks out (and try to keep away from LED lights, billboards, household appliances, especially battery car chargers and other interference sources), and any antenna erected indoors cannot fundamentally solve the problem of poor indoor reception. Many people think that buying an antenna can receive all FM signals within hundreds of kilometers of surrounding provinces and cities. You can receive as many channels as you want in all bands. There is no such magical antenna in this world. K- For 180WLA, we can only guarantee the quality and specifications of the antenna. We cannot guarantee that you can receive certain stations you want and can achieve the effect you want and the so-called expectation. All the videos in the description are the one in the first picture on the home page. The antenna is on the fourth floor The effect of the top 25-meter-long feeder, we describe the real antenna reception effect and never exaggerate, I hope everyone understands it clearly before making a choice. Please scroll down to the back for the answers to the questions about antenna concentration.

Unified answers to the questions about antenna concentration:

1. Can K-180WLA be installed indoors?
Answer: K-180WLA itself is designed to be an outdoor antenna front box with a fully waterproof structure that can be used outdoors for a long time. It can be used outdoors, of course, it can also be used indoors, but indoors are blocked by buildings and various indoor interferences. This is indoor The reason for poor reception. Therefore, try to erect it outdoors if possible, even if there is no condition, it should be close to the window or stick out of the window. The loop antenna belongs to the magnetic field type antenna, which is not sensitive to electric field type interference. The sound has a good suppression effect, and the K-180WLA pre-low noise amplifier can ensure that the medium wave/short wave/FM/aviation band also has a high gain, which is the fundamental difference between the electric field antenna and the magnetic field antenna.

2. Can K-180WLA be used in both medium wave and short wave FM bands?
Answer: K-180WLA preamplifier adopts high-frequency radio frequency amplifier, and its operating frequency is 0.1-180MHZ with a gain of about 20DB, which completely covers the medium-wave, short-wave and FM bands. But you can see that in the evaluation, some people say that the effect of medium wave is good, some people say that the effect of short wave and FM band is good, and some people say that all bands are effective, this is because the external antenna ports of different radios are not all bands That is, most radios do not have a medium-wave external antenna port. Of course, this type of radio is invalid for medium-wave, but most radio external antenna ports support short-wave and FM bands.

3. Which radios can be used?
Answer: As long as there is a radio with a corresponding band and an external low-impedance antenna port (50-75 ohms is the best), what kind of radio can be used depends on which bands your radio’s external antenna port supports. It’s just the same antenna The effects of different radios are different, because of the difference caused by the different performance of the radio (the radio without the external antenna port cannot be used, remember! Especially the definitions of the machine interface of Sangean and Sony are different).

4. Can I receive certain stations?
Answer: We can only guarantee the quality and indicators of the antenna, but we cannot guarantee that we will be able to receive certain stations you want to receive. Especially for shortwave, the propagation characteristics of ionospheric reflection and propagation at different times and seasons are different at different frequencies.

5. Are all the antennas new versions? What is the difference from the old versions?
Answer: The 2022 new version has added protective devices to the ports and optimized the circuit. The static electricity and radio terminals are not easy to damage the preamplifier due to misconnection, and the preamplifier is replaced with an imported device with higher gain and lower noise figure. , The power switch contacts are all treated with anti-oxidation, and the new version of the power supply box is a light touch switch (three-level gain adjustable) with a low battery reminder. And the preamplifier adds FMDX and HF switches to switch different positions to achieve better reception when used in different electromagnetic environments (this is a unique function of K-180WLA among all active antennas).

6. Are the antennas tested and delivered?
Answer: We have been making antennas for more than ten years, and the products have to be exported to foreign countries. All parts and components must be assembled and tested before they can be released, but it is not what you imagined. , there is no such LOW test method. We all have more advanced instruments to test its gain and coefficient and other indicators. Before delivery, we are 100% sure that all normal indicators are qualified. We process all orders completely according to trading rules. It can be 100% guaranteed that the products you receive are completely normal and qualified, and there are instructions at the end of the description about after-sales (in addition, the instruction manual is very important, you must read the instruction carefully when receiving the goods, and the precautions are also explained in the description below. look carefully).

7. Special reminder: Sangean 909X generation MW and SW can be used normally, only need to replace the 3.5 plug with a three-section plug. Sangean 909X2 second-generation MW is basically ineffective, because the external antenna port of this radio MW radio attenuates more than 48DB for the MW band, and the short wave can be used normally. Even if the radio is connected to an external antenna rod, it is still not completely disconnected (it is susceptible to interference, so the rod must be shortened to the shortest when connecting an external antenna), and it is necessary to adjust the AM RF GIAN of the radio to make the reception better. (This The explanation is just to let everyone understand the correct use of this machine, whether it is the first-generation machine or the second-generation machine, the shortwave has very good performance and reception effect).

8. How about receiving amateur radio signals? Answer: The transmission power of amateur radio stations is relatively small and cannot be compared with the tens of kilowatts of radio stations. They are relatively weak signals. Therefore, in order to have a good reception effect, the antenna must be erected outdoors, and the receiving direction should not be blocked.

9. Answers to questions about the aviation band: the aviation band belongs to the VHF band. This band is adjacent to the FM band. A large number of harmonics and other interference will seriously affect the reception of this band. Therefore, in order to have a good reception effect in the aviation band, you need to have a band pass For the SDR receiver with band-stop filter, the ordinary radio air band is only an additional function and does not have a separate external antenna port and a band-pass filter for the corresponding band. Therefore, in areas with poor electromagnetic environments, the receiving effect of ordinary radio is better than that with SDR receivers with bandpass and bandstop filters are worse.

10. Answers about the reception effect: the effect can be seen in the evaluation, and there is also a link to the test video in the description. You can take a look at it when you have time. The reception effect of the antenna is related to the location of the antenna and the electromagnetic environment. The function of the antenna is to improve the reception quality and improve the signal noise. In the same position, it can only improve the signal-to-noise ratio on the basis of the original signal. Only when the antenna is set up outdoors or on the roof can the signal that could not be heard before be heard, the original weak signal becomes a strong signal, and the original strong signal can be heard. The signal has become a super strong signal, so the antenna must be erected outdoors if possible. If not, it must be close to the window or stick out of the window. Originally, some people thought that with the addition of an antenna, even alien signals could be received. We can only guarantee the quality and specifications of the antenna, but we cannot guarantee that you can receive the signal you want to receive.

11. Explanation about antenna erection and lightning protection: the antenna has no lightning protection function, and the antenna design has a certain anti-static and lightning-inductive ability. The antenna must be erected under the protection of the lightning protection net. There are lightning protection nets, and the antenna must be erected under the protection of the sector of the lightning protection net, and must not exceed the height of the lightning protection net and the building. For details on lightning protection, please consult qualified relevant institutions and units.