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433MHz Transmitter Range Problem

Bluejets

Oct 5, 2014
6,920
Joined
Oct 5, 2014
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6,920
I tried several transistors but the problem persisted, maybe the only problem was that I didn't connect the antenna correctly.
At thr risk of repeating myself, these units will have very little reliable range, perhaps 20 or 30 metres at best and then on a good day.
If you want range of 100 metres or so use LoRa modules.
You will get no better range with the nrf24L01 mentioned above.
They do have a higher(amplified) output BUT you must buy the originals.
Clones are mostly useless.
 

AlwinOen

Feb 26, 2023
12
Joined
Feb 26, 2023
Messages
12
At thr risk of repeating myself, these units will have very little reliable range, perhaps 20 or 30 metres at best and then on a good day.
If you want range of 100 metres or so use LoRa modules.
You will get no better range with the nrf24L01 mentioned above.
They do have a higher(amplified) output BUT you must buy the originals.
Clones are mostly useless.
thanks for the answer. You know better than me, the range on the water is not like in open land, it is much lower. I don't know if this is valid at least at 2.4ghz frequency, 433mhz. but I can still get a 300 meter range on water with this module. so if i can get 100 meters with lora, i definitely need to learn to repair this transmitter. This is a transmitter for a product I use in a baiting boat for fishing, so I am constantly encountering malfunctions. so my only option is to learn to repair this product. Also, as far as I understand, this transmitter module also acts as an amplifier, I can understand it from the transistor on the right side of the module. am i wrong?
 

AlwinOen

Feb 26, 2023
12
Joined
Feb 26, 2023
Messages
12
The original product picture is below. The module I use is developed by the product manufacturer. Maybe that's why the range is so large.

Even if it's not the same product, it looks pretty similar. I'm so confused :)
 

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