08-15-2008, 04:28 PM
Read this treatise at Chuck's site. It explains the 1937-38 Philco automatic tuning system. Chuck also has a separate page dealing exclusively with Magnetic Tuning.
In a nutshell, Philco's first attempts at automatic tuning suffered from the inaccuracies of a mechanical system, so "Magnetic Tuning" (in reality, automatic frequency control or AFC) was added to the mix to keep the preset stations, as well as any strong station tuned in on the dial, on-frequency.
In a nutshell, Philco's first attempts at automatic tuning suffered from the inaccuracies of a mechanical system, so "Magnetic Tuning" (in reality, automatic frequency control or AFC) was added to the mix to keep the preset stations, as well as any strong station tuned in on the dial, on-frequency.
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Ron Ramirez
Ferdinand IN
