WELLINGTON BROADCASTING

Evening Post, Volume CXII, Issue 1, 1 July 1926, Page 14

WELLINGTON BROADCASTING

, 2YK's performance continues to give satisfaction, and the programmes do not leave much room for complaint, considering the amount of talent available in a community the size of Wellington, and the large demand which several programmes a week makes upon that supply-. The relay .transmissions continue to be an. excellent feature, especially the Sunday evening church service and subsequent concerts. A correspondent has drawn attention to a slight error of judgment which has occurred two or three times, when the officer in charge, in order to miss as little _s possible of the concert, has switched over from church to theatre without^ notice, before the service has concluded. This action offended the correspondent's sense of the fitness of things, and ho suggests that either the operator should wait till tho church service is over, or should make the change earlier. It should be remem-

bored, he suggests, that people who are enjoying the service are entitled to hear it all if possible, and it is a matter for consideration whether it would not bo better to cut the first item of the concert than the benediction and the choral closing. As it is, Mr. Weeks usually times his service so that it ends within a few seconds of 8.15, the time fixed for the opening of tho concert. Wellington's broadcast has a long reach in spite of the fact that only low power is used. A ship, operator informs "Grid-Bias" that on a recent Sunday evening he heard and enjoyed one of the Sunday band concerts at a distance of 1266 miles, using a detector and two stages of audio-frequency amplification. He added that 4YA is by far the most easily heard New Zealand station at a distance, which is what one would expect from its power; and that IYA is singularly hard to hear at any distance from the coast. Of the Australian stations, he found 4QG far the strongest and 3LO best in quality—a verdict which land-lubbers here will usually confirm. The current week's programme for 2YK is as follows:— To-night.—-7.30 p.m. Talk on Esperanto by Mr. William H. King. 7.50 p.m.; Miss Jean Turner and her Banjo and Mandolin Orchestra, also Miss Gweu Wing and concert party. 10 to 10.40 p.m.: Eelay of Manuel Hyman's Exhibition Dance Band from the Adelphi Cabaret. Friday.—2.4s p.m. to: 4.30 p.m.; Studio items and relay of Manuel Hymau 's Exhibition Dance Band from the Adelphi Cabaret. 7 p.m.: Children's Hour. 8 to 10 p.m.: Studio concert of latest Brif:ol Player rolls and records. Sunday.—6.ss p.m.: Eelay of evening service from The Terrace Congregational Church, conducted by the Eev. Ernest E. Weeks. 8.15 p.m.: Eelay from His Majesty's Theatre of the Professional Orchestral Concert. -- ' Monday.—B p.m.: Eelay from the Town Hall Concert Chamber of the public address by the Eev. Dr. J. D. Jones, the eminent English preacher who is visiting New Zealand. Tuesday.—7.4s p.m.: Eelay from the Paramount Theatre of theatre orchestra, under the direction of Mr. J. J. Caulton; studio items.

"D.W.M." writes, enclosing a diagram of a loosely coupled aerial circuit and a secondary circuit, asking how the energy picked up by the aerial is transferred to the secondary when there is no apparent connection between the two circuits; and also asks for guidance to a useful book that will explain such points to a beginner in wireless. * The transfer of energy is due to two facts: (1) When a current passes through a conductor, for example the aerial, it sets up in the space round it a magnetic field, the strength of which is proportional to the strength of the current, and which in tho case of the rapidly varying currents due. to wireless waves striking the aerial is of rapidly varying strength; (2) when a conductor is placed in a varying magnetic field such as that just described, currents are induced in it, proportionate to the rate of variation of the field strength. These are the facts, without the explanation, which is very much more difficult. The process is exactly the same as goes on in a power transformer such as is used in the city eleetrie lighting system. In these transformers, the primary and secondary circuits have no direct connection and the transfer of energy from one to the other is the result of the alternating magnetic field sot up. in the apparatus. The inquirer will find much reliablfe information very simply given in E. D. Bangay's small introduction to wireless, obtainable at most bookshops.