What kind of antenna is needed for the Jet 300 radio. MegaJet car CB antennas. Mechanical work during installation

Rating: 5 out of 5

Advantages:

Price quality reception stability

Flaws:

A comment:

I purchased this copy quite recently and got it for pennies.
I tested it as a hospital, with a simple antenna.
The reliable reception area with a wire at the antenna input (ordinary wire) is 7 kilometers.
It’s a pity that there is no normal antenna, but from experience I’m sure it will hold confidently for 20-25 kilometers. It is powered from 9 to 15 volts, very conveniently with fluctuations and low-quality power supplies (unless, of course, used as a hospital)

Overall I’m happy, I think it will be useful for the time.

Rating: 5 out of 5

Advantages:

Convenient push-to-talk, walkie-talkie easy to operate

Flaws:

Not found

A comment:

Working as a taxi dispatcher, I worked on Megajet. Excellent signal, switch to -/+ from the main channel. Magnetic antenna. During the New Year holidays, drivers wrapped tinsel around the antenna, which greatly interfered with signal reception.

Rating: 4 out of 5

Advantages:

Easy to set up and operate. Audibility during transmission/reception is good. Speech clarity. PRICE!

Flaws:

Noise reduction in automatic mode makes reception very rough.

A comment:

I was going on a trip on the X-trail Vladivostok-Krasnodar and back. I read reviews, forums. I chose the Megajet MJ-300 + Alan 145 cm on a magnet. I adjusted it myself using an SWR meter. I figured out the controls very quickly. It was always on during the trip. Contacted subscribers to check the reception/transmission range. On the plain, reception in normal weather conditions in summer is up to 10 km, transmission is up to 7 km. Hilly terrain and hills vary, reception is from 20 to 50 km (record) at the top and up to 3 km at the bottom, transmission is also from 700 m to 7 km. There is no need for more transmission range! And the reception is also quite sufficient to slow down in front of an accident, traffic police, camera, etc... It is better to choose manual noise reduction, on the border of interference, since automatic greatly coarsens the reception. Easy to use and reliable. Second flight around the country with her. Only a positive impression. There may be better, but it's enough for me. Advice: attach the antenna on a magnet in addition to the roof rails with clamps so that it does not move at all, otherwise the magnet (even through an elastic band) will rub the paint. I wanted to increase the power of the PRD, I took it apart and determined that the assembly was Chinese. No worries - it works great.

Rating: 5 out of 5

Advantages:

Price, quality, excellent reception

Flaws:

it would be desirable to improve

A comment:

I bought myself a Megajet MJ-300 about six months ago.
The following things attracted me to her:
1. Easy to control
2. Cost in stores and availability
3. Convenient PTT.
4. Inexpensive possibility of modification

I have long wanted to install a computer in my car in order to be aware of traffic jams, road conditions, repairs, etc., and just kill time on the civil wave. I read it, thought about it, and bought 300k. The price is quite reasonable.

I bought an antenna for it from Alanovskaya on a magnet.
I connected it to the cigarette lighter without any problems: it seemed more convenient to me.
I screwed the antenna to the radio, pulled the cable into the trunk, and placed it on the magnet.
Next, I screwed on the PTT switch, plugged it into the cigarette lighter and HURRAY! The radio is working.
I went straight to the long-range channel to test the walkie-talkie and play around with the noise reduction.
Accordingly: the less noise reduction is suppressed, the further it receives, but the more interference there is on the air.
In numbers:
1. Reception: with noise reduction completely turned off, up to 10 km (provided, of course, that the transmitter has a good antenna). On average 4-6 in city conditions. With full reception turned on, about 800-1400 m, but without a single interference.
2. Transmission: with Alan’s 145 antenna, it can travel 2-3 km in the city without any problems.

On this page you can find antennas for MegaJet radios that operate in the 27 MHz band, which is allowed for civil communications and does not require a license. These are the ones used by the vast majority of truckers, taxi drivers and travelers.

It is hardly possible to call any antenna the best for the Megajet radio station: they are all made for different models and different conditions. Here are some examples of such differences:

• MegaJet CB 50 MAG-125. This antenna is attached to the surface of the car using a magnet with a diameter of 12.5 cm. It is convenient to adjust the SWR on it. Continuous input power - 20 W, bandwidth - 700 MHz;
• but the MegaJet OMEGA model is installed in a car using a bracket. It allows you to work with 120 channels and has a maximum continuous power of 15 W;
• MegaJet T3-27-N MAG-90, on the contrary, is mounted on the machine using a hole in the body. This antenna supports 650 channels and produces a continuous output power of 20W.

Such differences are important for users, so consult with our specialist before purchasing the most correct model for yourself. We will help you buy exactly the antenna for the Megajet radio that you need. Call!

Description and Review

MegaJet MJ-300T- continuation of the once popular model with increased transmitter power. FREE performance test with purchase and FREE setup with purchase with antenna.

Description of the radio station:

1. Appearance of the radio station

The MegaJet MJ-300 Turbo car radio differs from the previous MJ-300 model by increased transmitter power AM-8 W, FM-16 W). The MJ-300 Turbo has compact dimensions (138x40x125) and a light weight - 1 kg assembled. The controls are conveniently located on the front panel, thanks to which you can configure the megajet MJ300 turbo radio station to the optimal operating mode. Thanks to the bright and comfortable backlighting of the front panel, as well as the LCD display, which displays the channel number and RX/TX signal level indicator, it is convenient to work with the MegaJet MJ-300 Turbo CB radio station even in the dark.

The stamping quality of the plastic parts is very good. The front panel is simple, has a minimum of buttons and knobs, and a small indicator, but the MegaJet MJ-300 Turbo radio has some differences in appearance from the MegaJet MJ-100. The radio station is made on the “600” technology platform (modern multifunctional radio stations MJ-600 and MJ-600plus are produced on this platform). The longitudinal size of the case is only 125 mm, which allows you to place the radio station in the limited space of any car dashboard. The radio station's PTT is equipped with a high-quality electret microphone, a powerful 3 W speaker is responsible for the sound quality, and it is possible to connect an external speaker.

2. EquipmentMegajet MJ-300 Turbo

• Transceiver
• PTT with microphone
• Power cable with fuse
• Mounting bracket
• User guide

3. Main declared functions.

• 135 frequency channels, including holes
• Ability to work in the Russian frequency grid (shift -5 kHz)
• Built-in input signal attenuator
• Channel indication
• RX/TX signal level indicator
• Adjustable spectral noise gate
• Scan mode
• Emergency tuning to channel 9

Megajet MJ-30 radio review0 Turbo

Megajet MJ-300 Turbo is designed taking into account the climatic operating conditions in central Russia, which guarantees a long service life and stable operation. MEGAJET MJ300 Turbo has good receiver sensitivity due to modern circuitry, and this is achieved by using a separate frequency synthesizer mounted on an LC7152N chip with external digital control. This made it possible to expand the frequency range, improve the spectral purity of the signal and improve the stability of operating parameters.

The design of the Megajet 300 Turbo radio station uses a Black Matrix type liquid crystal (LCD) display with memory of the current mode and with additional backlighting. Particularly convenient when using the LCD display are the 10 mm channel number indicator numbers, black numbers on an amber background. The information panel of the LCD display displays the main functional parameters of the operating modes of the CB radio station.

MegaJet MJ-300 Turbo is based on the SAMSUNG 3P9228AZZ-QZR8 processor and uses frequency (FM) and amplitude (AM) modulation. The station is capable of operating on 135 channels in the Russian and European frequency networks and has a transmitter power of up to 8/16 W (AM/FM). The transceiver has a channel scanning mode and the ability to emergency tune to channel 9. Megajet 300 Turbo has a compact size and an informative high-contrast backlit liquid crystal display. In addition, among the distinctive features it is worth noting the built-in input signal attenuator, the ability to work in “holes” and non-volatile settings memory.

CB radio station Megajet MF-300 Turbo combines excellent functionality, good transmitter power and a low price. We can safely call this model the optimal choice for country weekend trips. Compact size, low power consumption and ease of use combined with a magnetic base antenna* make this model a good choice for everyone. The Megajet 300 Turbo radio is better suited to big city conditions, where there is a high level of interference and a large number of stations.

ATTENTION! Do not use the radio without an antenna connected to it!

Among the wide selection of antennas, you can purchase what you need in RADIOSILA stores!

Radio station MEGAJET MF-300 TURBOcan be purchased in our departments at Moscow , St. Petersburg , Yekaterinburg , Tyumen , Perm, Chelyabinsk, Ufa, Samara or order delivery to any location in Russia: Kazan,Novosibirsk , Nizhny Novgorod , Omsk , Rostov-on-Don , Volgograd , Krasnoyarsk , Saratov , Voronezh , Krasnodar , Izhevsk , Ulyanovsk , Barnaul , Irkutsk , Novokuznetsk , Orenburg , Kemerovo and other cities.

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This station is designed to solve completely different problems. Apparently, in this way, the RKK company decided to divide the market and earn even more money.

And I dare say they succeeded. The station is quite interesting, it is not designed to work in AM, although it can work in this modulation. Her path is frequency modulation, or FM.
So, if you are a CB taxi driver, or just use the band mainly in FM, and don't want to spend a lot of money on a walkie-talkie, this station is for you. In the harsh operating conditions of taxi fleets, which is where the MegaJet MJ-300 is most often used, the station showed its best side. It is extremely simple and reliable. Now, let's take a closer look at it.

The station is supplied in a glossy silver cardboard box. Like MegaJet, the cardboard is thin but durable.

The station is well packed. Inside the box there is a plastic insert that absorbs shock and is designed to divide the space for transportation.

The kit includes the radio station itself, instructions in English, a headset, a mounting bracket and fasteners.

Appearance
In appearance, the station is very reminiscent of MegaJet, the general pedigree can be traced well. The body dimensions remain the same.


The front panel is made of plastic. The plastic looks cheaper than . It is more slippery and glossy.


The case consists of a chassis to which all internal electronics are attached, two metal covers, top and bottom. Each cover is attached separately using 4 screws. As I already wrote in, this is not very good, because at high volumes such a design will rattle.


Ergonomics have changed. Now it is more convenient to use the station. The volume control and noise reduction control knobs are still nearby, but they are now located vertically, which, in my opinion, is more convenient. The handles rotate with little effort, but softly and without jamming. On the front panel there are buttons for switching channels, a button for changing modulation, a button for turning on channel scanning, this mode has been added here. The CH9 button performs many functions, which are discussed below.
The display, like the one, has a pleasant amber backlight. The indication completely repeats the indication of its younger brother. The channel number, grid letter, modulation and mode 0/5 are displayed here.


The display has the same disadvantages. It is clearly visible only from the front and above. You can't see anything from below at all.


The headset connector is modern 4-pin and looks reliable.


The headset itself is very simple, like the one, it only has a microphone and a push-to-talk button.


The headset wire is also very soft and should not stiffen in the cold.

At the back of the station there is a connector for connecting an antenna, a jack for connecting an external speaker and a power cable.


There is no quick disconnect connector on the wire.

The speaker is located on the bottom cover, like almost all civilian radio stations. There is also a marking plate with the serial number.

Functions
In general, the station repeats its younger brother in functions, but there are some features. The station has 40 channels in normal mode, and 120 channels in extended mode. AM/FM modulation, operation in zeros and fives (0/5), in addition, there is a channel scanning function, which can be useful in unfamiliar areas, the function is displayed on a separate SC button. The main distinguishing feature is the presence of automatic noise reduction with manual adjustment. If market sellers tell you that the station has a threshold noise suppressor, do not believe it! A real spectrum monitor, but with the ability to adjust, which is a plus.

To switch the station to multi-grid mode, you need to turn off the station, hold down the A/F button and turn on the station. After a couple of seconds, you need to release the button and the message EP will appear on the display, which means that we have switched to multi-grid mode. The grids are switched using the CH9 button. The grid correspondence is as follows: M – C, H – D, L – B. A total of 120 channels. The station has a built-in attenuator, which can be turned on by holding down the CH9 button. The letters Lo (local on) will appear on the screen, indicating that the attenuator is turned on. To turn it off, we do the same thing and LF (local off) should appear on the screen. This feature can be useful in noisy airwaves. To switch between fives and zeros, you need to turn off the station, hold down the A/F and CH9 keys and turn on the radio. The buttons need to be released after a couple of seconds. The number 5 will appear on the display indicating that the station has switched to zeros. The scanning function is activated by the SC button. Scanning will continue until the squelch opens.

Inside
The station is made on a printed circuit board made of green PCB. The installation was neat, no soldering flaws were noticed. Not washed flux either.


And the one in the photographs was left by yours truly during revision. I use no-clean gel flux. The components on the board are not labeled, which may make it difficult to find the right element.


Some of the parts are not soldered, which suggests that this printed circuit board is also used for the production of other radio stations. The output stage is made according to the classical scheme, using 2SC2314 and 2SC2078.


The overall impression of the filling is positive.

Stated characteristics

Frequency range: 26.965…27.855 MHz
Number of channels: 120 AM/FM
Transmitter power: 10 W
Power: 13.8 V
Dimensions: 138(w) x 40(h) x 125(d)
Weight: 600 gr

Modifications
About improvements to MJ-300.

Bottom line
MJ-300, like , is not suitable for all tasks. They share the market harmoniously and should be used in their intended niches. Due to the fact that the station has only one noise suppressor, an automatic one, using it in the truckers channel (15AM) is not advisable, since it will simply irritate you with its constant triggering for no reason. If they offer it to you for Channel 15, don’t take it! For these purposes, a threshold noise suppressor is most suitable, as, for example, in the MJ-100. The path of the MJ-300 is either work in a taxi, or use for other tasks where frequency modulation is used.