Technical Tips
WHEN the detector valve is coupled to the audio stage by means of a resistance in its plate current, it is necessary to apply a much higher voltage than would be the case if a transformer were used here. (GENERALLY speaking, a wave-trap is not much good for cutting out local interference of the type caused by trams, flashing signs, power lines, ete,
HEN weak signals are being received it is very often an advantage to increase the value of the grid leak, and 4, 5, or 6 meghoms is not an uncommon value to use in such circumstances. A&C lamps are used for "sunlight" ray treatment are capable of causing tremendous interference with nearby receiving sets. [z is impossible to exercise too much eare in the- wiring, etc, when power is being taken from the mains.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19290712.2.82
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Radio Record, Volume II, Issue 52, 12 July 1929, Page 37
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139Technical Tips Radio Record, Volume II, Issue 52, 12 July 1929, Page 37
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