In previous articles, we discussed the basics of radio . In this article, we’ll delve a bit deeper into the use of repeaters , specifically by “building” a homebrew repeater using two walkie-talkies and a small box to interconnect them.

It’s important to note that one walkie-talkie will serve as the incoming antenna and the other as the outgoing antenna. As I’ve configured the walkie-talkies, the repeater’s data is as follows:

Frecuencia entrada: 447.020 Khz
Frecuencia salida: 446.020 Khz
Offset: +1000 Khz

Just to note, both walkie-talkies acting as repeaters should have their volume set to the maximum.

The little box that will make our lives easier is this one :

In this video, we can see its operation: the signal enters through the RX Walkie’s antenna, the audio exits through the headphone jack, goes through the little box, enters the TX Walkie through the microphone jack, and finally exits through its antenna:

NOTE: We attempted to create a crossover cable using a mono cable , but it didn’t work for some reason.