Useful Hints

Radio Record, Volume IV, Issue 39, 10 April 1931, Page 6

Useful Hints

(j ENERALLY speaking, an increase "dn the B voltage on the detector valve will mean increased strength of reaction. . HHN reaction seems much too «'" strong and it is inconvenient to take: off turns from the reaction winding, the effective capacity of the reaction condenser can be reduced by joining a fixed condenser of about equal capacity in series with it. (The smaller the capacity in series the greater the reducing effect.)

{tf has been definitely decided to hold a Radio Exhibition in Auckland, the dates chosen béing May 18 to 16 inclusive. It is not intended to make this exhibition as pretentious as the one held in 1929, owing to the current depression, but it will be an interesting and entertaining show nevertheless. It is to be held in the Town Hail as was the last one, but this year the Concert Chamber will probably be used in place of the main hall, and the exhibition will be open in the evenings only. The 1YA programmes during the exhibition will all be actually performed before the public at the Town Hall and relayed by the station. — HH programme by the 1YA Lroadcasting Choir on March. 31 was, without a doubt, one of the best ever presented from the Auckland station, and listeners have forwarded congratulations by the score. Congratulatory telegrams came from as far away as Dunedin, and the choir and conductor, Mr. Len Barnes, have every reason tu be proud of their very excellent work. * % Bd AN interesting relay is to be given by 1YA on Sunday afternoon, May 38. This will be the inter-denomina-tional youth rally at the Town Hah, when the principal speaker will be his Excellency the Governor-General, Lord Bledisloe. =: 2 HE only live body of radio enthusiasts in Auckland at the moment appears to be the Amateur Transnitters’ Association. On Sunday, March 29, they held a field day, dividing into three parties and proceeding . to three widely-separated ‘points. During the day communication between the three parties was established and the whole outing was an unqualified success. a * * R. FRANCIS CHICHESTER, who left Hobsonville, Auckland, on Saturday on an attempted flight to Australia, via Norfolk and Lord Howe Islands, carried a small transmitting set with him, using the call-sign ZKAK and a 48-metre wavelength. This is the first long-distance solo flight ever attempted with radio equipment, and is typical of Mr. Chichester’s wellconsidered plans. Casual in manner, he is remarkably attentive to practical details.