Talk:Automatic frequency control
Does anybody know why radios in the 1970s often had a separate FM-AFC mode distinct from FM, while radios since the 1990s do not? Is it just that tuners got be
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FM AFC
Does anybody know why radios in the 1970s often had a separate FM-AFC mode distinct from FM, while radios since the 1990s do not? Is it just that tuners got better? AFC made strong stations spread out to cover the entire dial space up to the next strong station, with a sharp transition between two stations, while completely masking out the weaker stations between them. I'm not sure if it was technically related to the capture effect. Modern radios do not do this, though the DX/Local switch on portable players also suppresses weak stations but in a different way. Sluggoster (talk) 12:33, 23 November 2008 (UTC)
Switch the afc off to find the centre frequency of the station, then switch it on. Otherwise the dial may be set wrong, resulting sometimes in limited ability to pull the frequency in one direction. The switch also acted to advertise the feature.
Also switching afc on on a weak station could detune the radio sometimes IIRC. Tabby (talk) 22:18, 16 August 2013 (UTC)
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