DuMont 180 Chassis

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Early Electronic Television

DuMont 180 Chassis

Early Television

Front view

Early Television

On the top chassis are the horizontal sweep and video output tubes. On the lower chassis are video detector, video IF and tuner tubes. Note the miniature tubes toward the front. The tuner was replaced with a postwar one.

Early Television

On the top chassis are the sync separator and vertical sweep tubes. On the lower chassis are the sound IF, detector, amplifier, and output tubes

Early Television

Rear view. The CRT is copied from the 1936 Cossor design.

Early Television

The original tuner

Early Television

The new switch assembly

Early Television

With the RF input trimmers installed. The empty hole is for the oscillator tube.

Early Television

The RF amplifier is working. I am missing 3 more trimmers for the RF output.

Early Television

The completed tuner

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