Radioddity CBL-561 Quick Guide

The Radioddity CBL-561 antenna comes with:

1. Lower part with built-in PL-259 plug, lower metal rod with extension coil (total mechanical length 44.5 cm / 17.5 in)
2. Silver extension radial (fixed length of 32 cm / 12.6 inch)
3. Top radial with a variable active length between 2.5 cm / 1 inch and 72.5cm / 28.54 inch
4. 2mm Allen-key (required to loosen/fasten the fixing part of the top radial)

Component Visual Description:

The antenna components are displayed side-by-side. Component 1 is the base with a coiled section. Component 2 is a silver rod. Component 3 is a longer, thinner rod. Component 4 is an L-shaped Allen key.

How to setup the antenna for use of a specific band:

1. Release the grub-screw of the fixing part (just a little turn counterclockwise) to align the length of the top radial.
2. Tighten the grub screw of the fixing part (by turning the grub screw clockwise).

Diagram Description: A diagram illustrates the process of adjusting the top radial. It shows a close-up of the grub screw being loosened and then tightened.

Required length of the top radial (measured from top of fixing part to top of radial):

Graph Description: A line graph titled 'length of top radial vs frequency' shows the relationship between frequency (f/MHz) on the x-axis and length in millimeters (l/mm) on the y-axis. The line shows a decreasing trend, indicating that as frequency increases, the required radial length decreases.

Important Note: The antenna is to be used either with a magnetic mount that is placed on a car or a similar structure acting as a sufficient counterpoise. It is not intended to be mounted directly onto the radio.