QRP operation

In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range.

[1] Reliable two-way communication at such low power levels can be challenging due to changing radio propagation and the difficulty of receiving the relatively weak transmitted signals.

QRP enthusiasts may employ optimized antenna systems, enhanced operating skills, and a variety of special modes, in order to maximize their ability to make and maintain radio contact.

A number of organizations dedicated to QRP operation exist, and aficionados participate in various contests designed to test their skill in making long-distance contacts at low power levels.

[10][7] QRP enthusiasts may use special modes that employ technology and software designed to enhance reception of the relatively weak transmitted signals resulting from low power levels.

[11] QRSS: Very slow speed Morse code Coherent CW: Critically-timed Morse code transmission WSJT: Weak Signal – Joe Taylor WSPR: Weak Signal – Propagation Reporter Many of the larger, more powerful commercial transceivers permit the operator to lower their output level to QRP levels.

All stages of the transceiver were on individual circuit boards: the transmitter was capable of about one or two watts of RF, and the receiver was a direct-conversion unit, similar to that found in the Heathkit HW-7 and HW-8 lines, which introduced many amateurs to QRP'ing and led to the popularity of the mode.