71. An AF amplifier is shielded to
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72. The pulsating d.c. appliedto power amplifier causes
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73. The disadvantage of impedance matching is that it
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74. If the gain versus frequency curve of a transistor amplifier is not flat, then there is _____ distortion.
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75. The most costly couping is ____ coupling.
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76. An oscillator converts
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77. In an LC transistor oscillator, the active device is
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