Questions and Answers
L McL. (Timaru): My 3-valve _ set * worked satisfactorily for the first six months, and since having adapted an eliminator and a pentode the set seems to burst into oscillation when called upon to take more than usual volume. I have had two radio men to see the set but they cannot solve the mystery. A.: If two radio men (we hope they are experts) visited your set and examined it you can hardly expect us to help you without seeing the set. From our knowledge of this set we suspect the screen-grid valve. Try replacing it with "~phother and altering the voltages.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19300912.2.55
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Radio Record, Volume IV, Issue 9, 12 September 1930, Page 27
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105Questions and Answers Radio Record, Volume IV, Issue 9, 12 September 1930, Page 27
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