A Correction
AN error occurred in an article on "Power Transformer Design and Construction;" ‘published in last week’s issue. In the printed diagram 280 type rectifiers are specified, but not only are these rectifiers incapable of standing the plate voltages called for, but the filament voltage required for them is 5 instead of the 7.5 provided by the transformer. Two half-wave rectifiers (type 281) could be employed in a fullwave rectifying circuit. Valves recommended for use are Marconi or Osram U8 rectifying valves. ‘These are the only full-wave rectifying valves capable of standing up to 500 volts input. 7
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https://paperspast.natlib.govt.nz/periodicals/RADREC19291227.2.70
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Radio Record, Volume III, Issue 24, 27 December 1929, Page 31
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99A Correction Radio Record, Volume III, Issue 24, 27 December 1929, Page 31
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