AMX TXC16 Plus Specifications download pdf (Page 43)

SG-2000 MANUAL 36

The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA

10.0 Power Supplies

Many power sources can be used with the SG-2000. Among these are:

• Transformer or regulated power supplies from AC mains

• Battery systems

• Solar Systems

• Wind Powered Systems

All modern transceivers run on 12 Volts DC. With the exception of AC mains power

supplies, all other systems supply DC suitable to run a radio. However, various

regulators may be necessary, because regulation of solar and wind powered systems is

difficult.

Another important consideration, how power is moved from the power supply to the

radio, can have a very high impact on ultimate radio performance, especially when

transmitting.

10.1 Cabling

Regardless of the type of power supply used, you should design cabling from the

power supply to the radio to minimize voltage drop. This drop occurs because wire is

not a perfect conductor of electricity. The longer the distance between a power supply

and a radio, the greater the voltage drop will be.

SGC recommends placing a power supply no more than 25 feet from a radio. There are

two reasons for this:

First. The voltage drop experienced over 25 feet, even when large conductor cabling is

used, is not acceptable.

Second. The longer the power cabling, the more chance that it will fail due to any

number of unforeseen circumstances.

When electricity flows from the power supply to the radio at low current levels, the

internal resistance of the wire has little effect. But as current increases, the voltage drop

becomes more pronounced.

Now apply that to your power wiring: turn on the radio at a low power level, such as

the receive mode where little power is drawn, and things will likely be just fine with

number 16 or number 14 wire at 25 feet; but turn on the transmitter, where lots of

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AMX TXC16 Plus Specifications Page 43