BasicB-003-017-005
In a mobile installation, why should the fuse in the DC line to the transceiver be located as near to the battery as possible?
C
Answer
Basic radio theory
Type
A
To reduce the voltage drop in the radio's DC supply
B
To better absorb voltage transients
C
To protect the entire circuit
D
To prevent the vehicle's electronic systems causing noise
Answer Notes
A fuse is a safety device designed to break the circuit and stop current flow if there is a short circuit, preventing wire damage or fires.
If the fuse is placed near the transceiver instead of the battery, any short circuit that occurs in the wire between the battery and the fuse remains unprotected. By placing the fuse as close to the battery as possible, the entire length of the power wire is protected.
The position of the fuse does not change the total resistance of the circuit, so it cannot reduce voltage drop. Fuses also do not filter noise or absorb transients.
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Compared to a switching (switch mode) power supply, why may a linear power supply be preferred?
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Apart from efficiency, what is one advantage of a switching (switch mode) power supply over a linear power supply?