Instructions for use

Small portable active loop antenna

Chelegance / Deshibo GA-450

This magnetic loop antenna is used for radio reception and is developed and manufactured by Deshibo for Chelegance. It incorporates high-quality circuitry and the ring body is made of stainless steel.

Please read this manual carefully before use!

Frequencies covered: 2 to 30 MHz

Antenna impedance: 50 ohms

Loop diameter: 20cm

Receive gain: 20dbi

Internal battery: 18350

Charging: via USB-C port

Included accessories:

1 x 1m RG174 cable with BNC male connector
1 loop antenna
1 control box with LED indicator

Equipment available in Europe from Passion Radio Shop: https://www.passion-radio.com/sdr-antennas/ch0030010-2424.html

This manual may be freely distributed provided that its contents are not modified, altered, copied or deleted.

Precautions for use :

Before using this antenna, please read the manual carefully and keep it.
Please do not disassemble the antenna yourself, otherwise the warranty will be void.
With built-in 18350 lithium battery. When the LED is off, the battery is discharged. The light will come on after a full charge, and you'll need to unplug the charging device in time to stop charging. Be sure to keep an eye on the device during charging. There's no BMS (battery system management).
When you're not using the antenna, switch it off to avoid discharging.

Finally, be patient to adjust the antenna when using it with radio/SDR receiving equipment to get the best reception results.

Main accessories

High-quality stainless steel ring body

Description: A circular loop made of stainless steel, approximately 20cm in diameter, designed for receiving radio signals.

Power control box

Description: A black box containing the antenna's power control and battery. It features an LED indicator for charging status and a work indicator. The box contains 18350 lithium batteries. The full charge indicator light changes color. Note: The charging device should be unplugged in time to stop charging as there is no BMS (battery system management).

Tuning knob: Used to adjust the antenna's reception frequency.
Work indicator: Shows when the antenna is active.

Stainless steel receiving

Description: The component that connects the loop antenna to the control box, likely containing the tuning mechanism and BNC connector.

BNC connector: Standard connector for attaching the antenna cable.

Instructions :

First, fully charge the antenna battery with a quality charger (not supplied).
Connect the cable between the antenna and the radio receiver or SDR you're using.
Place the antenna as close as possible to a window, or on a windowsill, balcony, etc. Note that the antenna is not waterproof and must not be exposed to rain or water.
Turn on the antenna switch and tune the radio or SDR to the frequency you wish to listen to, then turn the direction of the antenna to increase the signal, and then turn the tuning knob while paying attention to the variations in radio signal strength until you hear it at its strongest.
After completing the above steps, if reception remains weak, you can adjust the position of the antenna by turning it, to find the best position for a given signal.