External Power Adapters
Use the power connector to connect an external power adapter that
has a 2.5mm mono audio-style jack. When not using the battery
charger feature (ie. Battery Charger Jumper is removed), the
external power supply can be:
- 6 to 20 Volts DC (polarity is not important), or,
- 6 to 18 volts AC
IMPORTANT: Do not exceed the above voltages, or damage to
the XM3 may result. Such damage is not covered under
warranty.
Note that the ground of your external power supply will not be at the
same potential as the XM3's metal case.
Hint! If you use an Alkaline battery (with the Battery Charger
Jumper removed, of course), and an external power adapter
greater than 10 volts, power will come from the adapter (saving
battery life). When you are at home and plugged in, the XM3 will
operate from external power. When you mobilize, unplug the
adapter and you benefit from the long life of the Alkaline.
The milliamp rating (mA) of the power adapter does not
matter; any rating can be used with the XM3.
A suitable 12VDC regulated power adapter is RadioShack
PN#273-1773 (make sure you ask for Adaptaplug “E” 2.5mm
connector PN#273-1708, which is included with the adapter).
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