AMPLITUDE MODULATION HIGH FIDELITY



Broadcasting in The Mid-Thirties

This is a rare color photo of the output driver stage of the first 4QN transmitter [1936] situated South of Townsville, North Queensland.
The photo was generously supplied by Mr. D Baker who was a senior PMG engineer.
Since the transmitter was modulated at a low level, the color and intensity of the radiation from the plates changed with modulation.

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