Page 30 Advertisement 3

Radio Record, Volume V, Issue 3, 31 July 1931, Page 30

Eeda A Be LF; TRANSFORMER CURVES ARE ZAsY TO UNDERSTAND The curve ie an authoritative indication of 2 transformer 8 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 of a FERRANTI AF5. To begin with, you will notice that the chart j8 drawn to a musical gcale and that the easily recognised notes are then transferred into terms of 'freguency per second" ~nothing intricate Or misleading about that: The markinge on the left-hand side of the chart indicate the amplification value~that i8, the amount the gignal i8 amplified by the traneformer and one valve. As the duty of the transformer i8 to amplify signals not only strongly, but UNIFORMLY, it will be realised that perfection lies in the direction of a straight, horizontal line on the chart; and; to 8ome extent, curve j8 3 misnomer. The High Amplification and the Entire Absence of Peaks 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 2 Guarantee of QUALITY Your choice will then be_ FERRANTI ARthUR D: RILEX 8 Co , LTD: AUCELAND WELLINCTON PPRITETTN" @OCP@FBEBRUUCIECDU