RADIO REVIEW

New Zealand Listener, Volume 3, Issue 71, 1 November 1940, Page 55

RADIO REVIEW

Contributed bv

N.Z. DX R.A. Inc.

PS ll Address all Communications: P.O. Box 437, DUNEDIN.

Harmonics Fred. Morgan (Waiau) writes to let us know that he has tried the various stations listed in this column and found some at good clear strength, Mr. Morgan is puzzled at the reception of 2YB New Plymouth, which he hears on 810 ke/s and 1620 kec/s, and on the shortwave band. This query will no doubt interest others. The answer is that 2YB’s fundamental transmission occurs on 810 kilocycles, which is termed the first harmonic; the second harmonic or repeat spot will be found further down the band, viz., on 1620 kc/s, the third on 2430 kc/s, and so on. We are unable to advise the writer why reception of 1620 signal should be stronger than that of 810 kc/s. (The old variable condensers had a full circular movement-the present type describe a semi-circle.-DX.Ed.) American Radio Revenue The total revenue of 705 standard broadcast stations in America for the calendar year 1939 amounted to $89,990,646. For statisticians this table will be interesting. Year Stations . Revenue 1939 705 $89,990,646 1938 660 79,128,760 The major networks also show an increase in station numbers and revenue: 1939 397 $22,500,941 1938 350 19,645,447 The three major networks, Columbia, Mutual and National, claimed $5,631,228 net or 23.9% of the total. Their 23 stations had $5,428,924 or 23%. Which left $12,531,792 or 53.1% to the 682 other stations. Jam in Italy "I never thought the Italian people would be barred from hearing British broadcasts in their own language as a result of jamming by their radio authorities," said the radio contributor to the Wellington "Evening Post" in August. "Not for one moment do I think it a decision of E.LA.R., th official broadcasting authority, to purposely jam the BBC bulletins in Italian, but rather an order for them to do so issued by the Fascist Government. "Have you eyer heard .the interference, by the way? If not, then stay up one night and listen. It is not an objectionable sound as was the case when © Germany and Russia used to jam each other’s talks and news bulletins, but something akin to the tinkling of ‘sleigh bells. The jamming starts promptly at 10.45, and ends with the last word of the bulletin at 11."