NZART Amateur Examination                     page 7          NZARTX07 Security code 249733

  1. The output power rating of a linear amplifier in a SSB transmitter is specified by the:
    1. peak DC input power
    2. mean AC input power
    3. peak envelope power
    4. unmodulated carrier power

  2. The fifth harmonic of 7 MHz is:
    1. 12 MHz
    2. 19 MHz
    3. 28 MHz
    4. 35 MHz

  3. A spurious transmission from a transmitter is:
    1. an unwanted emission unrelated to the output signal frequency
    2. an unwanted emission that is harmonically related to the modulating audio frequency
    3. generated at 50 Hz
    4. the main part of the modulated carrier

  4. The following should always be included as a standard protection device in any power supply:
    1. a saturating transformer
    2. a fuse in the mains lead
    3. a zener diode bridge limiter
    4. a fuse in the filter capacitor negative lead

  5. The block marked 'Regulator' in the diagram could consist of:
    1. four silicon power diodes in a regulator configuration
    2. two silicon power diodes and a centre-tapped transformer
    3. a three-terminal regulator chip
    4. a single silicon power diode connected as a half-wave rectifier

  6. A rare DX station calling CQ on CW and repeating "up 2" at the end of the call means the station:
    1. will be listening for replies 2 kHz higher in frequency
    2. will reply only to stations sending at greater than 20 wpm
    3. is about to shift his calling frequency 2 kHz higher
    4. will wait more than 2 seconds before replying to his call
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