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Why are some frequency jammers so cheap?

Why are some frequency jammers so cheap?

  • 2022-05-26

frequency jammer


As a professional manufacturer of frequency jammer, NanJing BoKang Electromechanical Technology CO.,LTD often receives inquiries from some agents or customers. One of the contents of concern is: why are some other brands of frequency jammers so cheap? If you only look at the technical indicators of the frequency jammers announced by various manufacturers, it is not easy to see how many gaps there are. Then, why is there a large price gap?

Since most of the frequency jammers produced by various manufacturers now use plastic casings, the internal structure and components cannot be seen from the outside. The main components and electronic components are screened, and it is easy to understand clearly.

Take the above picture as an example, on the left we have chosen a frequency jammer from another manufacturer, and on the right is the SMa-818B5 frequency jammer produced by our NanJing BoKang Electromechanical Technology CO.,LTD After opening the case of the two mobile phone frequency jammers, the comparison results are obvious:

1. The model on the left has a simple structure, with only 10 frequency bands in total; the SMa-818B5 model on the right has a compact structure, standardized assembly, and a total of 12 frequency bands;

2. The antenna selected by the model on the left has simple materials and rough workmanship. The antenna tail is welded on the PCB board, and the installation is not standardized and suspended, which has potential safety hazards. The SMa-818B5 frequency jammer chooses a standard soft whip antenna, with a special antenna rubber sleeve to protect the inner core of the antenna, and the connection between the antenna tail and the PCB board is through standard SMA connection terminals, which is safe and reliable;

3. The frequency jammer on the left uses a simple circuit power adapter (with the casing removed), the power carried by the power supply is limited, and the circuit self-protection ability is lacking. The SMa-818B5 type chooses an industrial-grade switching power supply, and the stability and reliability of the two power supplies are not at the same level;

4. The frequency jammer on the left, except the power amplifier module circuit of 10 frequency bands, can see that the circuit design for adjusting frequency offset and bandwidth is very simple, and there is no corresponding protection circuit, and the adjustable frequency offset and bandwidth can be adjusted. Potentiometer is a chip potentiometer with low adjustment stroke accuracy. On the SMa-818B5 type, it is very obvious that there are protection phones for each frequency band module, and high-precision adjustable potentiometers are also selected;

5. The radiator bases of the two frequency jammers are also significantly different in size. As we all know, when the frequency jammer works continuously, a lot of heat will be dissipated, and the size of the radiator is directly related to the heat dissipation effect;

6. For the frequency jammer on the left, the main components are connected by direct welding of wires. This is a low-cost approach, which makes the price of such frequency jammers very cheap. For the SMa-818B5 type, all parts are The connected wire ports are all plug-in connectors. This is the standardized and standardized assembly connection method for electronic and electrical equipment. In the future, when repairing or encountering component failures, it is very convenient to replace parts by plugging and unplugging. parts;

7. Finally, let’s talk about the unorthodox approach of the frequency jammer on the left: according to its functional description, the device has several indicator lights and display shields to display the operating status and fault status of each frequency band, but from the disassembly photo It can be seen that these several indicator lights and display screens are only power-on display, and there is no status distinction for each frequency band at all, and there is no logic circuit for fault analysis in the electronic circuit of the circuit board, that is to say, Regarding the function of this part, this frequency jammer used a trick to deceive customers.

Through the above analysis, you can finally understand why some frequency jammers are very cheap.

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