7-A-100: MF-HF: Equipment Faults & Testing
7-100J1:
Which of the following conditions would be a symptom of malfunction in a 2182 kHz radiotelephone system which must be reported to the Master?
No indication of power output when speaking into the microphone.
Much lower noise level observed during daytime operation.
When testing a radiotelephone alarm on 2182 kHz into an artificial antenna, the Distress frequency watch receiver becomes unmuted, an improper testing procedure.
Failure to contact a shore station 600 nautical miles distant during daytime operation.
7-100J2:
Which would indicate a malfunction in a 2182 kHz radiotelephone system?
Failure to contact another station 60 miles distant during daytime operation.
No discernable traffic has been heard on the 2182 kHz during the radiotelephone silent periods.
Dramatic increase in noise level observed during the night and early morning hours.
The visual indication of power to the antenna fluctuates while testing the radiotelephone alarm signal generator into an artificial antenna.
7-100J3:
Which would indicate proper operation of a SSB transmitter rated at 60 Watt PEP output in J3E mode?
In SSB (J3E) voice mode, with the transmitter keyed but without speaking into the microphone, no power output is indicated.
In SITOR (NBDP) communications, the power meter can be seen fluctuating regularly from zero to the 60 watt relative output reading.
In SSB (J3E) mode, speaking into the microphone causes the power meter to fluctuate well above the 60 watt reading.
A steady indication of transmitted energy on an RF power meter with no fluctuations when speaking into the microphone.
7-100J4:
Which would be an indication of proper operation of a SSB transmitter rated at 60 watt PEP output?
In SITOR (NBDP) communications, the power meter can be seen fluctuating regularly from zero to the 60 watt relative output reading.
In SSB (J3E) voice mode, with the transmitter keyed but without speaking into the microphone, power output is indicated.
In SSB (J3E) mode, speaking into the microphone causes power meter to fluctuate slightly around the 60 watt reading.
A steady indication of transmitted energy on an RF Power meter with no fluctuations when speaking into the microphone.
7-100J5:
Your antenna tuner becomes totally inoperative. What would you do to obtain operation on 2 HF bands?
Bypass the antenna tuner. Use a straight whip or wire antenna approximately 30 ft long.
Without an operating antenna tuner, transmission is impossible.
It is impossible to obtain operation on 2 different HF bands, without an operating antenna tuner.
Bypass the antenna tuner and shorten the whip to 15 ft.
7-100J6:
Your MF-HF whip antenna breaks off and is carried away in a storm. What would you do to regain operation on MF-HF frequencies?
Rig a wire antenna approximately 35-40 ft long per the equipment instruction manual.
Rig a wire antenna 10-15 ft long from the antenna tuner to the highest vertical support.
Rig a horizontal, center-fed dipole antenna 40 ft long.
Rig a long wire antenna at least 200 ft long.
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