Wood & Douglas FM TV equipment

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During the 1980's, Wood & Douglas produced a range of 1.3GHz FM TV equipment that gave many amateurs their first taste of microwave ATV operation.

VIDIF

The VIDIF was an FM TV demodulator board with an IF input of 50MHz. Separate boards were required for video de-emphasis and the sound sub-carrier.

File:VIDIFp1.pdf VIDIF descriptive text

File:VIDIFp2.pdf VIDIF circuit diagram & pcb layout

File:VIDIFp3.pdf VIDIF component list

VP/D1

The VP/D1 was a dual function board for video pre-emphasis (for transmission use) or de-emphasis (for reception use). Links select which function is enabled. The addition of these simple boards made a big improvement to picture quality (1-2 picture grades).

File:VPD1p1.pdf VP/D1 circuit diagram & pcb layout
File:VPD1p2.pdf Emphasis characteristic curves

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