What could be a symptom caused by a ground loop in your station’s audio connections?
AnswerYou receive reports of “hum” on your station’s transmitted signal
MIX // GENERAL
Ham Feed
One question. One correct answer. One thing worth remembering.
ONLY THE RIGHT ANSWER //No distractors. No scoring. No account. Just repeated exposure to what you need to know.
Which of the following statements is true about PSK31?
AnswerUpper case letters use longer Varicode bit sequences and thus slow down transmission
What does “front-to-back ratio” mean in reference to a Yagi antenna?
AnswerThe power radiated in the major lobe compared to that in the opposite direction
What is a link budget?
AnswerThe sum of transmit power and antenna gains minus system losses as seen at the receiver
What is a possible effect of a resonant ground connection?
AnswerHigh RF voltages on the enclosures of station equipment
Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?
AnswerAll these choices are correct
Which mode of voice communication is most commonly used on the HF amateur bands?
AnswerSingle sideband
What is an SMA connector?
AnswerA small threaded connector suitable for signals up to several GHz
On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?
AnswerOn any General or Technician class band segment
How is direct binary FSK modulation generated?
AnswerBy changing an oscillator’s frequency directly with a digital control signal
What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?
AnswerRotation of the Sun’s surface layers around its axis
When is an analog multimeter preferred to a digital multimeter?
AnswerWhen adjusting circuits for maximum or minimum values
How does antenna gain in dBi compare to gain stated in dBd for the same antenna?
AnswerGain in dBi is 2.15 dB higher
Which of the following describes an azimuthal projection map?
AnswerA map that shows true bearings and distances from a specific location
What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?
AnswerAll these choices are correct
Which of the following describes Baudot code?
AnswerA 5-bit code with additional start and stop bits
What must be done to prevent standing waves on a feed line connected to an antenna?
AnswerThe antenna feed point impedance must be matched to the characteristic impedance of the feed line