NZART Amateur Examination &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp page 7&nbsp &nbsp &nbsp &nbsp &nbsp NZARTX07 Security code 264678
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<li>  SSB transmissions: 

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<li> occupy about twice the bandwidth of AM transmissions 

<li> contain more information than AM transmissions 

<li> occupy about half the bandwidth of AM transmissions 

<li> are compatible with FM transmissions 


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<li>  Harmonics are produced when: 

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<li> a resonant circuit is detuned 

<li> negative feedback is applied to an amplifier 

<li> a transistor is biased for class A operation 

<li> a sine wave is distorted 


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<li>  A low-pass filter is used in the antenna lead from a 
transmitter: 

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<li> to reduce key clicks developed in a CW transmitter 

<li> to increase harmonic radiation 

<li> to eliminate chirp in CW transmissions 

<li> to reduce radiation of harmonics 


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<li>  The following could power a solid-state 10 watt VHF 
transceiver: 

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<li> a 12 volt car battery 

<li> 6 penlite cells in series 

<li> a 12 volt, 500 mA plug-pack 

<li> a 6 volt 10 Amp-hour Gel cell. 


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<li>  The block marked 'Filter' in the diagram is to: 
<img src = "regps.gif" align = center width = 511 height = 
129> 
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<li> filter RF radiation from the output of the power supply 

<li> smooth the rectified waveform from the rectifier 

<li> act as a 50 Hz tuned circuit 

<li> restore voltage variations 


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<li>  The accepted way to announce that you are listening to 
a VHF repeater is: 

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<li> "hello 6695, this is ZL2ZZZ listening" 

<li> "calling 6695, 6695, 6695 from ZL2ZZZ" 

<li> "6695 from ZL2ZZZ" 

<li> "ZL2ZZZ listening on 6695" 


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