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How to Make a Shortwave Radio Antenna for Less Than $1.00

Two-way radio use and maintenance tips

First, the battery cost and maintenance cost

To achieve high energy density, low durability, and Select the green battery memory effect.
1st Operating temperature: -20 ° C – 60 ° C;
2nd Facelift, please check the two-way radio battery off is, non-governmental radio connector is on the battery;
3rd Battery lasts a long time kept on ice, first pre-charge the battery for about 50% of the electricity to prevent waste battery power;
4th The first three charge lasts for 16 hours as possible to reduce the memory function, after the charging time to 10 hours;
5th Battery 5-5-90 (ie 5% of the emission signal, the signal you get 5%, 90% of the stand-by) is usually the case with time of 8 hours, according to ICOM icf11 battery capacity will vary, quality, frequency of use.
6th Battery life in general from the battery "charge – discharge" measured Power cycles, but different standards for different brands walkie-talkie batteries, such as the MOTO battery is 300 times the minimum number of cycles.
7th For the average Nickel-metal hydride batteries and nickel-cadmium batteries. Must ensure that each wireless device before charging the battery completely with a clean (ie press the PTT button does not radio stations). Otherwise, it will have walkie-talkie battery storage. Greatly shorten the battery life.

Secondly, the communication distance

Professional machine, flat, open up the call from the barrier up to 3-5 km, but the two-way transmission of radio waves by obstacles (eg buildings, trees) be affected will be, at the same time, some external factors that tend to weaken the call signal, the call will have changed the field. When it comes to network support, the walkie-talkie calls from up to several tens of kilometers.

Thirdly, the choice of frequency

One of the 150MHz band, and the other is the 400 MHz band. Proposed Purchase of products 400MHz band, because the frequency of 400 MHz on the radio is relatively high, so that the antenna can be made relatively short, or careful look nicer to use, convenient. Also in Beijing, powerful 150 MHz band interference serious impact on the communication path, the same power situation is better than the 400MHz devices actual communication range 150MHz equipment.

Fourthly, the display

Some professional two-way radio with LCD display, not some is not, this absolutely, the radio said, with a relatively high-end LCD display. LCD is simply crashed because moist, and in some models for use in harsh environments in radio not appear interested through the LCD screen, such as MOTOROLA GP328plus should be considered again as a relatively high-end machines, no LCD screen.

Fifth, call function

In a network (ie set up a transit station) to support the case, some walkie-talkie to call the function to to achieve. If, however, call only between the existing single, the call of the function can not be achieved.

Sixth, radiation and antennas

Antenna 5-7 cm from the body calls for reducing the radiation, and try not to use the exposed antenna.

It should be noted that the use of walkie-talkie:

1 if KENWOOD th78a battery should be checked with the right Channels in order to avoid unnecessary mistakes.
Call 2, the use of walkie-talkie, the PTT should be maintained perpendicular to the microphone 3-5 inches from your mouth.
3, with the intercom system should avoid high temperature, moisture, combustible gas environment away from the gas station.
4, the use of walkie-talkie, the action of light, Do not use hand-held radio antenna on the ground, this is likely to cause damage to the antenna influence the conversation.
5, the introduction of electricity consumption, Answering machine low power consumption while waiting for power.
6, charging the first charge, preferably more than 8 hours, or influence on the future of the charging efficiency and Battery life.
7, using the process in which the switch should not be repeated action, while the volume on that section of the position Her hearing has been adjusted.
8, can only Kirisun original or approved by the antenna, not unauthorized or modified antennas could damage the radio or in violation the provisions of industrial Radio Management Committee.
Not 9, walkie-talkie radio can twist, serve to damage easily when their power management market.
10, do not use the damaged antenna, in the start, when the damage can be connected to the antenna contact with skin, wash it in minor burns.
11, MOTOROLA HT1000 battery must Kirisun original battery or batteries and approved Charger should be 50 to 40 degrees Celsius in the environment and, if more will be affected as this temperature range, the battery life, but even there, a sufficient dissatisfaction with the nominal power.
12, to avoid electromagnetic interference or EMI problems, written in the "connect the walkie-talkie" logo of the event Switch PTT off. Such as hospitals, airports, gas stations and other places.
13, walkie-talkie after long-term use can easily cabinet knobs and buttons dirty, remove the control knob on the radio, and with a neutral detergent and a damp cloth to clean the cabinet. The use of such cleaning agents, Alcohol, aerosol sprays and other chemicals can damage the surface and the walkie-talkie.

About the Author

Professional Two way radio battery shops
UK shop: global-battery.co.uk
US shop: sales-battery.com

Both are the retailer and wholesaler of laptop batteries,digital gamera batteries,camcorder batteries and battery chargers. These are top-quality Two way radio Batteries at the lowest possible price available.

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