SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING.

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Presentation transcript:

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING If repeaters are unavailable after a disaster and you are limited to simplex operation, a portable transceiver with its original flexible antenna is inadequate for emergency communications.

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING "Rubber ducky" antennas are rubber covered helical springs, which are intended to withstand some rough handling, but they are not indestructible. Flexible antennas used on California fire lines for several weeks showed a 60% failure rate. Flexible antennas should be replaced annually or as soon as they show ANY apparent kinks, cracks, abrasion or other wear to visual inspection An effective expedient to improve a flexible antenna is to attach a counterpoise (19.5" long for the 2-meter band, or 6.5" for the 70 cm band) of stranded wire, crimped and soldered to a battery clip or ring terminal which will fit over the antenna connector.

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING Flexible antennas are safer when working in close quarters around people and are more durable when walking through dense vegetation for wildfire suppression or search and rescue operations. They better for dual-band transceivers because telescoping antennas are usually mono-band. Dual-band flexible antennas approximate a 1/4 wave on 2 meters and a 5/8 wave on 70 cm, are optimized for one band and may resonate poorly on the other. How efficient a particular antenna is can be determined only by testing.

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING BATTERY POWER BASICS A common error of new RACES / CERT operators is failure to plan to carry enough battery power. Cycle and recharge dry NiCd packs monthly. An adapter cord to power your transceiver from an auto cigarette lighter plug or a gel cell battery is needed for extended operation.

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING STANDARD POWER CORD CONNECTORS Auxiliary power cords for low current devices up to 8A should use twin lead, red-black AWG14 or AWG16 The plug, receptacle and pin set is rated for 8A continuous duty and costs $0.99 from Radio Shack It is recommended that you rig two sets of cords directly to your car battery If all you have is a portable transceiver, the above information will help to ensure that you can provide an adequate signal for reliable emergency communications.

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING Your mouth in relationship to the microphone The volume of your voice Talking across the microphone

SOUTHWESTERN ALABAMA ARES GROUP EMERGENCY COMMUNICATIONS TRAINING