Coupon for Frequency Test on July 24
See Special Article on Front Cover. One Guinea Prize Information Concerning Nature of Set: Name Address HOW RECEIVED BY SEE Frequency. Normal Fading Silene 30,000 16,384 15,360 Trequency series representing the 14,336 overtones which are necessary to 13,312 obtain correct rC- production 0 f 12,288 quality. 11,26+ S$ 10,240 9,216 8,192 7,178 " 6,16+ 5,120 " 4th octave above middle 0 4,096 3,072 31& octare ahove middle 0. 2,048 2nd octave above middle C. 1,024 Ist; octare above middle O_ 612 Middle 250 Ist actave below middle 128 Znd octave below middle 0. 64 grd octave below middle 0 32 NCTE Mipimum Range for Reason- 4,000 eble receptiqn; S0
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https://paperspast.natlib.govt.nz/periodicals/RADREC19280720.2.64
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Radio Record, Volume II, Issue 1, 20 July 1928, Page 15
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114Coupon for Frequency Test on July 24 Radio Record, Volume II, Issue 1, 20 July 1928, Page 15
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