| 41. | IF is called the " image frequency " and must be rejected by the tuned circuits in the RF stage.
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| 42. | By adjusting the tuning of this tuned circuit, Armstrong was able to dramatically increase the gain of the Audion amplifier.
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| 43. | Radio frequency VCOs are usually made by adding a varactor diode to the tuned circuit or resonator in an oscillator circuit.
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| 44. | The tuned circuit, consisting of a coil and a capacitor connected together, acts as a resonator, similar to a tuning fork.
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| 45. | This audio signal can be heard separate from the video, using standard analog FM radios equipped with the appropriate tuning circuits.
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| 46. | When using a tuned circuit in the input, the network must match the driving source to the input impedance of the grid.
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| 47. | The signal bandwidth of the amplifier is limited by the Q-factor of the tuned circuit but this is not a serious limitation.
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| 48. | A tuned circuit could block AC of one narrow band of frequencies, or allow passage of AC of one narrow band of frequencies.
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| 49. | An RF amplifier may have tuned circuits at both its input and its output, so three or more tuned circuits may be tracked.
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| 50. | An RF amplifier may have tuned circuits at both its input and its output, so three or more tuned circuits may be tracked.
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