Chapter 10 – Electrical, Antenna Structure and RF Safety Practices. Open and Short Circuits Electrical Safety Grounding RF Environmental Safety Practices RF Awareness Guidelines Maximum Permissible Exposure (MPE) Limits Limiting RF Exposure. Normal, Open and Short Circuits.
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Open CircuitNormal, Open and Short Circuits
Short circuit is a very low resistance path across voltage source.
Current can be very high and possibly result in a fire.
A fuse in the circuit can protect against a short circuit condition by forming an open circuit.
While Amateur radio is a safe activity, there has been considerable discussion and concern in recent years about the possible hazards of electro-magnetic radiation (EMR) including both RF energy and power frequency (50-60 Hz) electromagnetic fields.
.3 to 3
3 to 30
30 to 300
300 to 1500
1500 to 100000
* Transmitter power = Peak-envelope power input to antenna.
Far Radiating Field
Near Radiating Field