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receiver used positive feedback to improve selectivity in a 1926 design. Q-multipliers were common on shortwave general-coverage and communications receivers of the 1950s. With the advent of crystal and ceramic intermediate frequency filters, the Q-multiplier was no longer popular.
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era as either a factory installation or an add-on device. In use, the Q multiplier had to be adjusted to a point just short of oscillation to provide maximum sensitivity and rejection of interfering signals.
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of its tuned circuits had been increased. The Q multiplier was a common accessory in shortwave receivers of the
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http://www.historywebsite.co.uk/Museum/Engineering/Electronics/AJSSymphony/Symphony.htm
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Circuit added to a radio receiver to improve its selectivity and sensitivity
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The principle of regeneration applied to radio receivers was developed by
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within the receiver. This has the effect of narrowing the receiver's
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by adjusting it to oscillate. This could be used for reception of
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to improve its selectivity and sensitivity. It is a
135:, American Radio Relay League, 1977 no ISBN, p. 259
55:A Q multiplier could also be adjusted to act as a
133:The Radio Amateur's Handbook, Fifty Fifth Edition
148:The A.J.S. Symphony Seven Receiver - Inside Out
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168:This electronics-related article is a
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172:. You can help Knowledge by
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61:beat frequency oscillator
27:is a circuit added to a
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69:Morse radiotelegraphy
131:Tony Dorbuck (ed.),
35:adjusted to provide
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87:See also
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93:Q meter
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