User manual

Connecting to DC power

Connect the power cable of the radio to 12 V DC power supply of your car, motor home or boat. In

caravans or at home we recommend to use a suitable AC/ DC power supply, capable to deliver 6-8 A at

stabilized supply voltage between 10.8 and 15.6 V.

If possible, do not increase cable length and connect the power cord as close as possible directly to the

battery terminals. The cable has a looped-in glass fuse for 10 A protection. If this fuse should blow, try to

find out the reason, and replace the fuse only with its original value and never with wires, silver paper or

aluminum foils!

Connect the red wire with the positive + terminal, the black wire with the

negative (-) terminal of the battery.

The negative wire terminal is grounded (standard in most cars). However, do not use the car body as

negative terminal and try to connect the (–) terminal of the battery instead, wherever possible! Please

note that grounding of the housing may cause electrolytic and galvanic corrosion effects in steel or

aluminum boats. Insulating of the radio housing and antenna may be necessary in such cases.

Rear side connections

Antenna selection

Mobile (car) antenna

Simple reduced size magnetic base antennas or car antennas with window mount or glass mount are

not the best choice for 25 W-30 W powerfull radios! Please install a powerfull VHF mobile antenna with

grounded antenna foot. Keep maximum possible distance to passengers and place the antenna

accorcing to the car manufacturer’s instructions as far away as possible from sensitive electronic circuits

of the car wiring. Check the good ground connection to the car body of the antenna foot.

Please remember that you and the passengers are in the immediate vicinity of a transmitting aerial,

particularly when used as a mobile. In case you are wearing a pacemaker, and the doctor or the

manufacturer of the pacemaker has recommended keeping a certain safe distance from the aerial, then

please follow their instructions!

Any antenna must be checked and aligned for best possible SWR (standing wave ratio). The final power

amp transistor of your AE 540 is able to tolerate an SWR up to 1:2.

Use a PL 259 type plug for antenna connection. A good, VHF usable quality has teflon insulation! Do not

transmit without connecting the aerial and never touch the aerial during transmission!

Antenna socket for

PL-259 (UHF)

Power cable assembly

12 V (13.8 V) DC

External Speaker terminal

(3.5 mm mono, 4-8 Ohms)