I ‘d like to continue to send
Amateur radios, handy machines, mobile machines (on-board units), fixed machines (stationary machines) that help control, reduce, and mitigate the attacks of technology crimes and high-tech crimes.

It will be an example and introduction of.

Please refer to it.

▼I use a handy radio for amateur radio made by Icom, Alinco, and Baofeng to receive the radio waves (144MHz band and 430MHz band) of the uplink downlink, which is the frequency for amateurs abused by the perpetrator, and noise. Although it is mixed, the voice of the perpetrator has been confirmed.

Also, although it is a car driver who is orbiting the vicinity, it seems that the frequency of amateur radio is used for communication with the perpetrator. (144MHz band and especially 430MHz band (430-440MHz)

And it seems that V2K and microwave auditory technology are also used for communication among perpetrators, drivers, and collaborators walking nearby.

Actually, in my case, I think that the number of cooperators has decreased because I can hear conversations and exchanges with the circling driver by always scanning with a handy radio (especially 430 to 440MHz).

As a scanning method, it is difficult to always turn the dial of the radio to search for the frequency, so it is better to specify the lower and upper limits of the frequency such as program scan (430 to 440MHz).

Also, when sleeping, it is better to turn down the volume so that you can hear it a little.

In my case, Icom’s handy machine, ID-52, can scan the 144MHz band and 430MHz band at high speed with a simple operation, so it is effective for scanning conversations and exchanges between the perpetrator and the driver. It has come out.

It is also effective when there is a ground station of an amateur satellite in a group of perpetrators near the person being attacked.

▼By using a handy radio, a mobile machine made by Alinco (on-board unit), and a fixed machine made by Yaesu Radio (stationary machine for placing at home), by receiving radio waves of the frequency used by the perpetrator. I feel the attack from the other party, but I have reduced it by about 70% and have been able to decline. (Electromagnetic waves, V2K, microwaves, voice transmission, image transmission, acquisition of thinking information, etc.)

In addition, I think it is good to utilize scan functions such as program scan that specifies the lower limit and upper limit range and memory scan that registers the frequencies frequently used by the perpetrator.

In addition, the squelch function that can adjust the reception sensitivity is used to reduce the attack by increasing the reception sensitivity, and the RF gain function is used to adjust the reception gain of the radio wave (maximize the gain, etc.) to reduce the attack. I think it is possible.

You can also suppress or reduce the attack from the other party by pressing the button (PTT button) that emits and transmits radio waves according to the frequency used by the other party or by transmitting and outputting the radio waves.

In my case, when transmitting radio waves, the main body becomes hot in a few minutes in the case of a handy machine, and in a mobile machine, the main body becomes hot in about 10 minutes depending on the output, even if it is a fixed device. I was able to continue sending for more than 8 hours without getting too hot.

In principle, an amateur radio license is required to emit radio waves (depending on the output, amateur radio technician 4th grade or higher)

I usually focus on receiving and reduce the attack, and when the attack becomes stronger, I send it to suppress and reduce it.

Also, as evidence when consulting with the police, it is good to use the reception of radio waves on the radio and the confirmation of the perpetrator’s voice as evidence.

In my case, if it is a handy machine made by Baofeng, it can be purchased at Amazon for about 8000 yen as a set of two, so it is useful for receiving fixed frequencies often used by perpetrators.

The price is reasonable with the radio name UV5RE, but the included radio alone cannot perform memory scans and program scans, and the instruction manual states that it can be done using writing software.

Besides, if it is a handy machine (DJ-S57LA) made by Alinco, it is not high speed, but the reception sensitivity is good and the reception of the 430MHz band (430 to 440MHz) used by the perpetrator and the uplink downlink radio wave can be confirmed well. increase.

I use Yaesu Radio’s FT-991A as a fixture, and it can transmit radio waves for a long time.

DR-735D / H manufactured by Alinco as a mobile device, and I feel that it is effective in reducing or suppressing attacks by receiving radio waves from the perpetrator.

For the antenna, I purchased a TWAY RDIO 144 / 430MHz band transmission / reception Yagi antenna from Amazon, and I use a stainless steel T-shaped hanger rack for indoor use and for mounting the antenna.

(If the antenna is installed outdoors, the perpetrator may harass you if it violates the Radio Law, and you may be notified to the communication station for the purpose of obstruction.)

I use Daiichi Denpa Kogyo Diamond MX2000N Triplexer (HF ~ 50/144 / 430MHz) to share one other antenna with two radios and transmit / receive at the same time.

An M-type coaxial cable for amateur radio is used to connect the radio and antenna, and an M-male-M-male connector and conversion adapter are used to connect the coaxial cable to the triplexer.

A N female-M male connector and conversion adapter are used to connect the triplexer and Alinco’s mobile machine, DR-735D / H.

I think it is better to use the connector and conversion adapter properly according to the device to be connected.

It is also possible to connect a handy machine to a triplexer or Yagi antenna by using connectors such as N female-SMA male, N female-SMA female, M female-SMA male, M female-SMA female, and conversion adapter.

▼Generally, household outlets are AC (alternating current) of 100 to 220V, so if you purchase a DC stabilized power supply that converts to 13.8V DC, you will be able to use mobile machines and fixed machines at home.

Although it is a regulated DC power supply, it is okay if it has a capacity of 10 to 15A for mobile machines and 20A or more for fixed machines.

In my case, I purchased Alinco’s DM-330MV, 32A, and connected a total of two fixed machines and mobile machines, and I can use them without any problems.

Depending on the budget, use a handy machine (about 8,000 to 20,000 JPY), a mobile machine (about 35,000 to 80,000 JPY), and a fixed machine (stationary machine) (about 120,000 to 200,000 JPY). I think it’s good.

It is possible to reduce or suppress the attack by receiving only with a handy machine, but connect the Yagi antenna to a mobile machine or a fixed machine and make it horizontal on the ceiling in the house, the balcony outside the room, the roof, etc. from your own head. I think that if you install it as high as possible, you can mitigate, reduce, and suppress the attack.

At that time, there is an application called MagnaAR that was shared by e-mail last time that can display the direction of the electromagnetic wave coming in with AR, and use this application to check the direction of the radio wave electromagnetic wave and change the direction of the Yagi antenna. I think you should adjust it.

The part where the director is located should be directed in the direction of the radio wave, and the reflector should be on the opposite side.

As an example of utilization, in the case of Baofeng’s handy machine UV5RE, since it is possible to receive two bands at the same time, it is used for simultaneous reception of 144MHz and 430MHz bands and simultaneous reception of 430Mhz and 431MHz. Also, for a set of 2 units, it costs about 8,000 yen(JPY), so I purchased 10 units and use it for reception when the perpetrator frequently uses the frequency or when the frequency is frequently switched to attack.

I use Alinco’s handheld device (DJ-S57LA) for program scanning that scans the frequency range from 430MHz to 440MHz.

And Icom’s handheld device, ID-52, can also receive two bands at the same time, so I use it to scan conversations and interactions between the perpetrator and the driver.

Alinco’s mobile machine, DR-735D / H, can also receive two bands at the same time, and the price is about 40,000 yen(JPY), so I think it is good to connect it to the Yagi antenna as a fixed machine at home.

Yaesu Radio’s fixed device, FT-991A, has a maximum output of 50W and I use for radio wave transmission output for attacks from perpetrators, reduction when radio waves are strong for a long time, and suppression.

Mobile devices can also transmit strong radio waves with a maximum output of 50 W, but since the main body gets hot in about 10 minutes, I think that fixed machines are suitable for transmission output to suppress attacks for a long time and to reduce.