The ARRL Ham Radio License Manual Quotes

“Repeaters consist of a receiver and transmitter that re-transmit the information from a received signal simultaneously on another frequency or channel. [T1F09] This is called duplex communication.”
― ARRL Inc., The ARRL Ham Radio License Manual

“The AM broadcast band extends from 535 to 1700 kHz and the FM broadcast band covers 88 to 108 MHz. Frequency bands used by amateurs are called amateur bands or ham bands.”
― ARRL Inc., The ARRL Ham Radio License Manual

“Signals that have a frequency greater than 20,000 Hz (or 20 kHz) are radio frequency or RF signals. [T5C06”
― ARRL Inc., The ARRL Ham Radio License Manual

“learning how to use your radio and taking some simple training classes, such as the ARRL’s Introduction to Emergency Communication training course, you’ll be ready to join and practice with other hams. The largest ham public service organization is the Amateur Radio Emergency Service (ARES) which is organized by the ARRL. You can join a local ARES team to receive training and practice providing emergency communications support.”
― ARRL Inc., The ARRL Ham Radio License Manual

“For example, “QTH?” means “What is your location?” and in response “QTH Seattle” means “I am located in Seattle.” Many of these procedures and abbreviations are still in place today, because they work!”
― ARRL Inc., The ARRL Ham Radio License Manual