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The program's objective is to encourage amateurs to self-regulate and comply with the rules.
A capacitance hat adds capacitive loading near the end of a short antenna, making the antenna electrically longer than its physical length.
The official G4E07 source identifies the vehicle battery charging system as a possible source of HF receive interference.
A two-input AND gate produces a high output only when both inputs are high.
A vehicle auxiliary power socket and its wiring may not be rated for the current required by a 100-watt HF transceiver.
A CW transmitter's keying waveform is a time-domain signal, so an oscilloscope is the best instrument for examining its rise, fall, and shape.
The official G6B05 source identifies large obtainable inductance as one advantage of a ferrite-core toroidal inductor.
RACES transmissions must be controlled by a person holding an FCC-issued amateur operator license.
The solar flux index is a measure of solar radio radiation at a wavelength of 10.7 centimeters.
If the LUF rises above the MUF, there is no frequency window left for ordinary skywave communication over that path.
An oscilloscope has horizontal and vertical channel amplifiers that control the time-axis and signal display.
The usual amateur convention is upper sideband for voice on frequencies of 14 MHz and above.
Mesh networks can route around a failed node by sending packets through alternate nodes when another viable path exists.
When using a 60-meter antenna other than a dipole, the operator must keep a record of the antenna's gain.
Because USB extends above the displayed carrier frequency, a 3 kHz-wide USB signal should be displayed at least 3 kHz below the upper band edge.
One way to check current propagation on a desired band is to use internet-connected automated receiving stations and see where your transmissions are being received.
One-way transmissions may be used to assist people learning the International Morse code.
Standing waves are eliminated when the antenna feed-point impedance matches the characteristic impedance of the transmission line.
At a given incidence angle, the critical frequency is the highest frequency that will still be refracted back to Earth.
A Type N connector is a threaded, moisture-resistant RF connector designed to perform well into the microwave region, with the pool citing usefulness to 10 GHz.
Moving from S8 to S9 is one S unit, or about 6 dB. A 6 dB power increase is approximately four times the power.
High geomagnetic activity can create auroras that reflect VHF signals.
Vertically stacking horizontally polarized Yagis compresses the pattern in the vertical plane, narrowing the elevation beamwidth.
Scatter propagation can place signals inside the transmitting station's skip zone.