OUTPUT INCREASE

Hawke's Bay Tribune, Volume XXII, Issue 117, 3 May 1932, Page 4

OUTPUT INCREASE

We all know perfectly well from experience how much the working of a set is often improved by a little extra

H.T. voltage, or perhaps it would ba better to say how noticeable the per. formunce of the set falls off if the H.T, is allowed to drop even a comparatively small amount from its rated value. The last 20 or 30 volts makes a very big difference, and although we are very conscious of this we may not perhaps stop to think of the reason. It is because the power output of the set increases much more rapidly than in proportion to the anode voltage. Theoretically, in fact, the power output varies more rapidly than as the square of the anode voltage. If it varied according to the square of the voltage, then an increase of 10 per cent, in the anode voltage would produce an increase in the power output of about 21 per cent. Actually the increase la considerably more than this. Au increase of 20 per cent, in the voltage will theoretically produce an increase of over 50 per cent, in the power output. So that there is all the difference in the world between, say, 90 volts and 120 volts H.T., assuming, of course, that the higher voltage is suitable for the particular case.