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

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:

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.


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)

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...

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.

I'm glad someone finally spoke
Here is a picture of the front tiles
20180204_1..932.jpg Download (907.87 kB)
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 ...

(+), 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.

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

I suggest you look where the battery cable enters and find the mass along this route.

I have a question maybe stupid but I do not know so I ask. Can the antenna mass be taken from a minus battery?

The minus supply is not always the ground of the system.

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?

I have a request or can someone indicate exactly on the photo where the mass is

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

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]

The unit is a waste of money and unreliable.