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This document contains the schematic (as drawn by Bruce Abbott), of the composite video encoder used by Amstrad in their MP1 modulator/power supply for the CPC464.
This circuit can generate a composite video signal, from the Amstrad's RGB video output suitable for the aerial input of a television.
In Bruce's own words: "The colour produced by this curcuit is a bit smeary, due to not having a luminance delay line. It uses the Motorola MC1377 encoder chip."
This image was originally taken from the Amstrad newsgroup comp.sys.amstrad.8bit, but has since been corrected.