Radioddity Extended manual for Radioddity DB25-D, DB40-D & GD-88 v3.0
© Radioddity 2023 page 27 of 252
5.1.3 Radioddity DB25-D power supply options
5.1.3.1 Mobile Operation
The radio comes with a cigarette-style plug. After connecting a proper antenna
this allows immediate use within a car but due to often bad electrical connections
between the cigarette lighter socket and the cigarette plug, we recommend to use
a fused, but direct wiring to the car´s battery.
The vehicle battery must have a nominal rating of 12 V. Never connect the
Radioddity DB25-D to a 24V battery. Be sure to use a 12 V vehicle battery that
delivers sufficient current. If the current to the DB 25-D is insufficient the display
may darken during transmission or transmitting output power may drop
excessively.
Notes: If the car battery is not fully charged or when the engine is switched off but
the battery is still not fully charged, the battery may discharge and there will
not be enough power to start the car. Please avoid using the radio in such
situations.
1. Route the DC power cable supplied with the Radioddity DB25-D directly to the
vehicle's battery terminals using the shortest path from the transceiver We
suggest you do not use the cigarette lighter socket as some cigarette lighter
sockets introduce an unacceptable voltage drop that may cause the radio to
turn off or reboot when starting a transmission. The entire length of the cable
must be dressed so it is isolated from heat, moisture, and the engine secondary
(high voltage) ignition system/cables. If you use a noise filter, the metal parts
of the car shall be fitted with an insulator to prevent it from touching the car.
2. After installing the cable, in order to avoid the risk of damp, please use heat-
resistant tape to tie together with the fuse box. Do not forget to reinforce the
whole cable.
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