Hi guys! My English isn’t that great but I’m sure you guys can understand my what my problem is.

I’m here new, actually I’ve just registered to the site. The reason why I registered is the range problem of my rc boat.

2 years ago my friend gave me a rc set which is include receiver(losi mrx 14 I think. Receiver and esc is combined) and a transmitter. The transmitter wasn’t have an antenna on it, I soldered my old router’s antenna on it. It was working fine 2 years ago. I was building a rc boat and I was able to use it in 15-20 meters range but sometimes I had some stuttering because of the range I guess.

Currently I’m building an another rc boat and I tried to mount the same kit but this time I have a big problem with the range. The problem is I’m not able to use it even in 1 meter range, sometimes I can use it in 3-4 cm range. (Lol) Anyway, I looked inside of the receiver and transmitter, they are look fine to me. I tried to solder an another antenna on the transmitter but I’m experiencing the same problem.

I’m electronic noob. I don’t know which battery I should use, I researched the receiver’s battery and the official site says that you can use 7,4v nimh or 2s lipo battery. Currently I’m using 2s lipo battery from my rc heli..

Thank you!

I tried to upload photo and video about my problem but I can’t add links in the thread.

Assuming both your receiver and transmitter are made by Losi, you should be able to find information about them on their website here...

Losi

Also if the transmitter is using 2.4 ghz, it is possible that the cable going into the antenna is actually a small coax cable. Without knowing the model of your transmitter or seeing the antenna connection on the circuit board, it would be hard to tell what type of antenna or frequency it has. However, if it is a 2.4 ghz model where the antenna is soldered directly to the circuit board, there is a pretty good video on youtube on how to properly solder a 2.4 ghz antenna. Here is the video...

neither 1 of those are losi they are rebranded Spektrum..id just purchase a new radio and rx...one made for water use...

Tomorrow the first thing I will do is your suggestion and the video. Then I’ll leave an update about the progress.

Currently If I don’t fix the problem I will buy a new rc kit from a second handed website.