Level 2 · Lesson 2.1

Repeaters and simplex

Jimmy Bob, a friendly cartoon mountain man in a trucker cap and overalls

“A repeater on a mountaintop turns a little handheld into a holler-wide voice.”

You'll be able to

explain repeaters, offsets, and tones, and know when to use simplex.

means both stations transmit and receive on the same frequency, and 146.520 MHz is the national 2-meter FM simplex calling frequency. A receives on one frequency and retransmits on another at higher power from a high location. The difference is the , usually 600 kHz on 2 meters and 5 MHz on 70 centimeters. Many repeaters require a subaudible tone (often called a PL tone) to open.

Tap an underlined word for its meaning.

Try it

On-air activity

program a virtual handheld with frequency, offset, and tone to open a simulated repeater.

This one happens on the air in The Shack, which opens in a later phase.

Quick check

Get 2 of 3 right to complete the lesson.

1. The national 2-meter FM simplex calling frequency is…
2. The usual repeater offset on 2 meters is…
3. A CTCSS tone is used to…

Repeaters and simplex

You'll be able to

Try it

Quick check

Words from this lesson