Music Transmitter Radio via Walkie Talkie 2025-12-09

Using a Uniden UH620 UHF CB Radio Walkie Talkie and my laptop, I have created my own personal “radio” music station to listen to.

Firstly, I connected my walkie to my laptop using a 2.5mm to 3.5mm audio jack. I then enabled VOX/VX mode on the walkie, which automatically transmits when it detects an audio input. (Note: due to a 5-minute transmit limit of most walkies, every 5 mins the transmission will stop for less than a second, and then resume).

Another thing to note is that even though this walkie's maximum output is 2W (on HI mode), it will not be able to sustain this without draining the batteries, even when plugged in. To ensure constant transmission, set it to standard or LO mode (0.5w).

I then set my computers audio output to the audio jack, and put the volume on 10. This is to ensure the audio isn’t distorted. This is due to the fact that the radio expects a 100mw input but my laptop gives a 1w output.

Here is a comparison of different volumes and how they affect the audio quality.

Laptop vol.10
Laptop vol.50
Laptop vol.100

I then seated the walkie talkie in its charger so it would always be powered.

Upon playing an mp3 on the laptop, I can hear it on any walkie connected to the same channel as the walkie connected to the laptop!

Note: you should set your pc/laptop to output mono audio, as walkies do not support stereo audio. If you don't, you will only hear one out of 2 channels of audio

Note: This video is with the laptop's volume at 50. The audio quality would've been better if the volume was at 10.

It’s like your own legal, personal radio station!

Note: only use channels that you are permitted to use for these purposes. For Sydney, refer to https://radioindustries.com.au/uhf-frequencies/ . You should choose a channel allocated for General Use. Ensure that you abide by all laws and regulations while doing this, as they may differ from place to place.

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