Anyone have a schematic for early 60's Zenith with peak picture control? - Videokarma.org TV - Video

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Anyone have a schematic for early 60's Zenith with peak picture control?

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11-21-2013, 09:51 PM

earlyfilm

Eternal Member

Join Date: Jun 2011

Location: Culpeper, VA

Posts: 527

Quote:

Originally Posted by Kamakiri

. . . . it does have a "quad coil" adjustment. To this day I have no idea what that does.

The quadrature coil is Zenith's name for a resonant coil, that is tuned slightly offset from the FM carrier, and is used to detect the FM sound modulation instead of the more common ratio detector.

Jas.

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