Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

204 FREQUENCY MODULATION, Volume IF-M AUDIO MEASUREMENTS WITH ANA-M RECEIVER*!ByR. J. NewmanEngineering Products Department, RCA Victor Division,Camden, N. j.SummaryThe procedure for determining modulation level and making audioresponse measurements by the "Bessel Zero" method is covered in detail."Bessel Zero" points are explained and the problems of finding them andhow to use this information is discussed. The paper then dealsprocedure for making measurements of the AF response.with the(3 pages; 2 figures; 1 table)* Decimal Classification : R254.12.f Broadcast News, August, 1944.A SQUARE LOOP F-M ANTENNA*fByJohn P.TaylorEngineering Products Department, RCA Victor Division,Camden, N. J.SummaryA typical installation of an FM antenna built around the top of an AMtower rather than on a flagpole extension is discussed. This constructionadds little weight or wind resistance. Theory, details of construction, andtuning procedures are described.(5 pages; 11 figures)* Decimal Classification: R320 X R630.f Electronics, March, 1945.