Le . TRANSFORMER CURVES ARE EAGY To UNDERSTAND The curve is an authoritative indication of a transformer s performance, and you will be repaid many times for the little care you take in understanding and comparing curves. Before buying a transformer ask to see the curve 0f a FERRANTI AF5. To begin with yoU will notice that the chart is drawn to a musical scale and that the easily recognised notes are then transferred into terms of "frequency per second"_ '_nothing intricate or misleading about that The markings on the left-hand side of the chart indicate the amplification value~that is, the amount the signal is amplified by the transformer and one valve_ As the duty of the transformer is to amplify signals not only strongly but UNIFORM- LY,it will be realised that perfection lies in the direction of a straight, horizontal line on the chart; and; to some extent; (6 'curve" is a misnomer: The High Amplification and the Entire Absence of Pealts on FERRANTI Transformer curves is not equalled by any other transformer when connected in the normal manner THAT IS WHY WE ASK YOU TO COMPARE THE CURVES BEFORE YOU BUY Choose Your AUDIO TRANSFORMER Firstly by CURVE; Secondly by MECHANICAL DESIGN and FINISH, and Finally by the NAME, which is a Guarantee of QUALITY. Your choice will then be FERRANT I ARTHUR Da RILEX 8 COs LTD: AUCKLAND WELLINGTON
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https://paperspast.natlib.govt.nz/periodicals/RADREC19311204.2.4.2
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Radio Record, Volume V, Issue 21, 4 December 1931, Unnumbered Page
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231Unnumbered Page Advertisement 2 Radio Record, Volume V, Issue 21, 4 December 1931, Unnumbered Page
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