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Extending Wireless Range of Fish Finder Outlife XJ-01 from 50m to 150m: Technical Queries

Kamen31 14166 12
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  • #1 17014769
    Kamen31
    Level 2  
    Posts: 3
    Rate: 2
    Hello, I am asking the local forum users for advice. I don't know if I chose the right forum section with my topic but I hope so. Well, I just bought a device called the Fish Finder Outlife XJ-01 fishfinder whose only downside is the working range between the transmitter and receiver, it is about 50m. I am looking for a way to increase the wireless range of this device to a minimum of 150m.
    The device looks like this:
    Extending Wireless Range of Fish Finder Outlife XJ-01 from 50m to 150m: Technical Queries
    It consists of a Receiver with a display that operates on a frequency of 433MHz and has a connector for an SMA male antenna.
    However, the transmitter or sonar sonar works at 125KHz and unfortunately there is no replaceable external antenna but rather a "wire" soldered into the plate which serves as the antenna that can be seen in the photo below.
    Extending Wireless Range of Fish Finder Outlife XJ-01 from 50m to 150m: Technical Queries

    I have a question for people who have knowledge that will solve my problem.
    Will replacing the antenna in the receiver with a larger one increase the range of the device?
    I bought a 6dbi antenna with a frequency of 433MHz on aliexpress (because only I found it seems to be appropriate)
    Extending Wireless Range of Fish Finder Outlife XJ-01 from 50m to 150m: Technical Queries
    will this antenna increase the range of the device to some extent?
    Is it so that the larger the antenna of the receiver, the greater the range of receiving signal from the transmitter?
    I do not see the possibility of interference in the antenna of the transmitter here so it is probably not possible to rework this "wire" for a better power antenna?
    I am asking for help and answer to my question. Thank you very much in advance...
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  • #2 17030200
    ArturAVS
    Moderator  
    Posts: 26008
    Help: 2294
    Rate: 7711
    Kamen31 wrote:
    It consists of a Receiver with a display that operates on a frequency of 433MHz

    Kamen31 wrote:
    In contrast, the transmitter or sonar sonar works at 125KHz


    Nonsense. 125kHz is the frequency of the sonar, not the transmitter (otherwise they would not get along).
    From what I can see, there is space in the housing for the antenna socket (the Chinese saved).
    You would have to insert a socket and give a normal antenna. Show a clear photo of the other side of the board.
  • #3 17030378
    Kamen31
    Level 2  
    Posts: 3
    Rate: 2
    I'm glad someone finally spoke :)
    Here is a picture of the front tiles
    Extending Wireless Range of Fish Finder Outlife XJ-01 from 50m to 150m: Technical Queries20180204_1..932.jpg (907.87 kB)You must be logged in to download this attachment.
    And will replacing the antenna in the receiver anything at all? should you mainly try to fight the sonar and its plate?
    arturavs wrote:

    You would have to insert a socket and give a normal antenna.

    But to insert a socket, we must have + and mass? the question is whether this plate has + and mass ...
  • #4 17030928
    ArturAVS
    Moderator  
    Posts: 26008
    Help: 2294
    Rate: 7711
    (+), the so-called hot you have at the soldering point of this pseudo-antenna (wire). Mass right next to a wide path.
    Solder a piece of RF shielded cable, and connect the socket. Antenna socket and .....

    While replacing the antenna in the receiver may not bring any results, the use of a normal and tuned antenna instead of a piece of wire in the transmitter will definitely improve performance.
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  • #5 17032770
    Kamen31
    Level 2  
    Posts: 3
    Rate: 2
    I will wait for the antenna, if its replacement reaches my required minimum, then I will leave it, if not, I will probably be forced to mount the antenna in the transmitter
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  • #6 17143783
    paweliam
    Level 10  
    Posts: 99
    Rate: 3
    I suggest you look where the battery cable enters and find the mass along this route.
  • #7 17390982
    paweliam
    Level 10  
    Posts: 99
    Rate: 3
    I have a question maybe stupid but I do not know so I ask. Can the antenna mass be taken from a minus battery?
  • #8 17391055
    ArturAVS
    Moderator  
    Posts: 26008
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    The minus supply is not always the ground of the system.
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  • #9 17391088
    paweliam
    Level 10  
    Posts: 99
    Rate: 3
    because I connected it so and the range is poor and now I am thinking about it

    Added after 3 [hours] 44 [minutes]:

    Will some signal booster help me improve the range?
  • #10 17446881
    paweliam
    Level 10  
    Posts: 99
    Rate: 3
    I have a request or can someone indicate exactly on the photo where the mass is
  • #11 17846439
    Marecki00131
    Level 1  
    Posts: 1
    Hello. Can you increase the range through this amplifier
    Brand: GHXAMP
    BLT53A is very suitable for some digital transmission system, on some specific occasions you may need 2 in power communication, such as handheld meter reading, security, hydrological monitoring, aircraft model and other applications. Using the BLT53A can be very fast to get the required power so as to reach the required communication distance.
    1. BLT53A is a silicon based power amplifier that provides high bandwidth from DC-3G support operations.
    2. Designed for the ultra-thin, ultra-small SOT89 package, BLT53A provides full input and output close to 50 ohm internal match.
    3. BLT53A has very high efficiency, 6V power supply, 433m output working frequency 33dbm (2W) when the power supply efficiency is 65%.
    4. BLT53A internal anti-ESD protection diode, can be a good anti-ESD to avoid damage to the device.
    5. BLT53A is very simple to use to achieve ultra-low cost bom, and provide multiple application reference under design frequency such as with SI4432 3.3V output 1w
    AN2: SI4432 + BLT53A 3.3 v 1 at 433 m
    AN3: A7102 + BLT53A 3.6 v 1 at 433 m
    AN4: SI4432 + BLT53A 4.8 v 2 at 433 m
    AN5: CC1100 + BLT53A 4.8 v 1 at 433 m
    The maximum power consumption is 23dbm, which is 0.2 in. The amplifire IC is not capable of 1 in power.
    Package
    1 pc board
    pictures
    12456
    Extending Wireless Range of Fish Finder Outlife XJ-01 from 50m to 150m: Technical Queries
  • #12 18799056
    agataf
    Level 6  
    Posts: 21
    Rate: 5
    Hello. I am sticking to the topic but asking for a sma antenna. What dimensions, because it got lost somewhere and I want to buy an identical one

    Moderated By Madrik:


    Google - Dimensions of the SMA connector.

    3.1.19. Do not send messages on archival topics if this is another question, in particular other than the questioning person. Out of respect for the questioner, create your own topic. You can only add a solution to the problem


    [/ mod]
  • #13 20172923
    bungaflorendo
    Level 1  
    Posts: 1
    The unit is a waste of money and unreliable.
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Topic summary

✨ The discussion revolves around extending the wireless range of the Outlife XJ-01 fish finder from 50m to 150m. Users suggest that the 125kHz frequency is for the sonar, while the transmitter operates at 433MHz. Recommendations include replacing the internal antenna with a proper SMA socket and antenna to enhance performance. Users also discuss the possibility of using an RF shielded cable and signal boosters, such as the GHXAMP BLT53A amplifier, to improve range. There are inquiries about grounding and the correct connection points for the antenna. Overall, the community provides technical insights and potential solutions for enhancing the device's wireless capabilities.
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FAQ

TL;DR: 125 kHz sonar, "insert a socket and give a normal antenna," then tune 433 MHz to extend range safely. This FAQ helps Outlife XJ‑01 owners reach longer range with practical antenna and connector mods. [Elektroda, ArturAVS, post #17030200]

Why it matters: It shows fish‑finder owners how to fix poor range with the simplest, most effective, and low‑risk antenna upgrades.

Quick Facts

What frequencies does the Outlife XJ‑01 use for link and sonar?

The radio link uses 433 MHz. The 125 kHz figure is the sonar ping frequency, not the RF transmitter. [Elektroda, ArturAVS, post #17030200]

Will a larger receiver antenna alone get me from 50 m to 150 m?

Not necessarily. “While replacing the antenna in the receiver may not bring any results.” The bigger gain comes from fitting a tuned external antenna to the transmitter. [Elektroda, ArturAVS, post #17030928]

Where do I connect an external antenna on the transmitter PCB?

Solder the coax center (“hot”) to the pad where the stock wire was. Solder the shield to the adjacent wide ground track. Route to a panel antenna socket. [Elektroda, ArturAVS, post #17030928]

How do I add an SMA socket to the transmitter?

  1. Identify the RF hot pad and the nearest ground plane.
  2. Solder a short RF shielded cable (center to hot, braid to ground).
  3. Mount an SMA socket, strain‑relieve, seal, and fit a tuned 433 MHz antenna. [Elektroda, ArturAVS, post #17030928]

Can I use the battery negative as antenna ground?

No. “The minus supply is not always the ground of the system.” Use the PCB ground near the RF pad instead. [Elektroda, ArturAVS, post #17391055]

How do I find ground if it’s not labeled?

Trace the battery cable into the board and look for ground along that route. Use that ground for the antenna shield. [Elektroda, paweliam, post #17143783]

Is there room in the transmitter housing for an antenna socket?

Yes. A member noted space in the housing for an antenna socket, suggesting a simple mechanical add‑on. [Elektroda, ArturAVS, post #17030200]

Which antenna connector fits the receiver?

The handheld receiver uses an SMA interface and accepts an SMA male antenna. Match SMA type when buying replacements. [Elektroda, Kamen31, post #17014769]

Will a 6 dBi 433 MHz antenna double my range?

In free space, doubling range needs about a 6 dB link‑budget increase. A 6 dBi antenna can supply that on one end, subject to alignment and losses. [Friis transmission equation]

How long should a 433 MHz quarter‑wave whip be?

Approx. 17.3 cm for a quarter‑wave monopole at 433 MHz. Many whips are slightly shorter due to construction and velocity factor. [Whip antenna]

Can a 433 MHz power amplifier like BLT53A help?

Possibly. A BLT53A‑based board discussed claims up to 33 dBm (≈2 W) at 433 MHz from 6 V, which increases link budget significantly. [Elektroda, Marecki00131, post #17846439]

Is the Outlife XJ‑01 reliable?

One owner reported, “The unit is a waste of money and unreliable.” Consider reliability feedback before investing in hardware mods. [Elektroda, bungaflorendo, post #20172923]

I used battery minus as ground and range is poor — what now?

Rewire the antenna shield to the PCB ground near the antenna pad. Recheck coax length and solder joints, then test line‑of‑sight. [Elektroda, ArturAVS, post #17030928]
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