B-003-20: Antenna and tower safety, lightning protection
B-003-20-01:
Why should you ground all antenna and rotator cables when your amateur station is not in use?
To protect the station and building from lightning damage
To lock the antenna system in one position
To avoid radio frequency interference
To make sure everything will stay in place
B-003-20-02:
How can an antenna system be protected from lightning damage?
Ground all antennas when they are not in use
Install a balun at the antenna feed point
Install an RF choke in the antenna feed line
Install a fuse in the antenna feed line
B-003-20-03:
How can amateur station equipment best be protected from lightning damage?
Disconnect all equipment from the power lines and antenna cables
Use heavy insulation on the wiring
Never turn off the equipment
Disconnect the ground system from all radios
B-003-20-04:
What equipment should be worn for working on an antenna tower?
Approved equipment in accordance with provincial safety standards concerning climbing
A reflective vest of approved color
A flashing red, yellow or white light
A grounding chain
B-003-20-05:
Why should you wear a safety belt if you are working on an antenna tower?
To prevent you from accidentally falling
To safely bring any tools you might use up and down the tower
To keep the tower from becoming unbalanced while you are working
To safely hold your tools so they don't fall and injure someone on the ground
B-003-20-06:
For safety, how high should you place a horizontal wire antenna?
High enough so that no one can touch any part of it from the ground
Above high-voltage electrical lines
Just high enough so you can easily reach it for adjustments or repairs
As close to the ground as possible
B-003-20-07:
Why should you wear a hard hat if you are on the ground helping someone work on an antenna tower?
To protect your head from something dropped from the tower
So you won't be hurt if the tower should accidentally fall
To keep RF energy away from your head during antenna testing
So someone passing by will know that work is being done on the tower and will stay away
B-003-20-08:
Why should your outside antennas be high enough so that no one can touch them while you are transmitting?
Touching the antenna might cause RF burns
Touching the antenna might reflect the signal back to the transmitter and cause damage
Touching the antenna might radiate harmonics
Touching the antenna might cause television interference
B-003-20-09:
Why should you make sure that no one can touch an open-wire feed line while you are transmitting with it?
Because high-voltage radio energy might burn the person
Because contact might break the feed line
Because contact might cause spurious emissions
Because contact might cause a short circuit and damage the transmitter
B-003-20-10:
What safety precautions should you take before beginning repairs on an antenna?
Be sure to turn off the transmitter and disconnect the feed line
Be sure you and the antenna structure are grounded
Inform your neighbors so they are aware of your intentions
Turn off the main power switch in your house
B-003-20-11:
What precaution should you take when installing a ground-mounted antenna?
It should be installed so no one can come in contact with it
It should be painted so people or animals do not accidentally run into it
It should not be installed in a wet area
It should not be installed higher than you can reach
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