Page 11 Advertisements Column 1

Nelson Evening Mail, Volume LXXI, 13 January 1938, Page 11

SEEING ELECTRICITY REMARKABLE NEW INSTRUMENT WITH WHICH CAN BE SEEN THE ACTUAL WAVE FORMATION OF ELECTRIC CURRENTS. m m Each child at school, and every student of physics learns that electricity (and this includes radio signals) travels in the form of waves. Such statements they necessarily accept as facts in the absence of any other tenable theory. Following years of research scientists have evolved an instrument, known as an OSCILLOSCOPE, which establishes the wave theory by projecting images of electrical wave formations on to a screen using a cathode ray tube. Radio reception depends, of course, upon the magnifying of infinitely small signals, as picked up by the aerial, to the stage where they are clearly audible. Unless the radio is perfectly adjusted distortion takes place, the music is “blurry,” and distance reception is not good. For that reason an OSCILLOSCOPE provides the one perfect means of actually “seeing” and adjusting the radio waves at all stages of magnification and thus vastly improving performance and tone. THE OSCILLOSCOPE, SHOWING CONTROLS AND WAVE IMAGE ON SCREEN. WILKINS & FIELD’S RADIO SERVICE DEPARTMENT Oscilloscope wave formation photograph indicating severe tone distortion before radio had been adjusted. MAS NOW INSTALLED THE ONLY OSCILLOSCOPE IN THE NELSON AND MARLBOROUGH PROVINCES Used in conjunction with the Oscilloscope is a new type of signal generator and the complete equipment is housed in a specially-designed SCREENED ROOM. This room is totally enclosed by closely welded fine wire mesh and the whole structure is carefully earthed to filter out electrical noises and “interference.” Thus your radio can, under perfect conditions be adjusted to a degree of precision which exceeds even that of many factories. Oscilloscope adjustment makes old radios like new and new radios even better. DON'T BE SATISFIED WITH JUST 'FAIRLY GOOD' RADIO RECEPTION IF YOU WANT THE VERY BEST PERFORMANCE & TONAL PURITY SEND YOUR RECEIVER TO THE 3EST EQUIPPED RADIO SERVICE IN NEW ZEALAND. JUST 'PHONE, WRITE OR CALL £ Oscilloscope wave formation photograph showing partial correction after radio had been tuned with ordinary servicing instruments. Oscilloscope wave formation photograph showing perfect curve after adjustment of the radio with the Oscilloscope. WILKINS & FIELD, Ltd. THE RADIO DEALERS HARDY STREET NELSON. MARKET STREET, BLENHEIM.

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