WIRELESS NEWS

Press, Volume LXVI, Issue 19854, 15 February 1930, Page 9

WIRELESS NEWS

(By "MAX.") The latest problem which the writer was called upon to tackle was one where a new receiver, consisting of a detector and two of audio, had an audio frequency howl. Being a very highpitched whistle, reminiscent of the on<? that occurs in a "super" regenerative set, and as the tickler coil had obviously too many turns, these were reduced a few at a time. However, oscillation control became very erratic over the different parts of the band, so a good look over the wiring was taken.

The cause of the trouble proved to bo the want of a wire from the lower side of the tuning coil to the filament, called the grid return. This was soon remedied, and then a few turns wore added to the tuckler, as too many had been taken off, and then the set worked up to expectations.

Now, the first thought of the writer had been that the symptoms were of an open grid circuit, probably in an audio stage. Putting the earphones in the plate circuit of the first valve disproved this. The point that should bo taken to heart is that a howl that will not stop, even with the detector not. oscillating, is most likely to be duo to an open grid, and the homo experimenter should eliminate this probable cause first.

Major Court-Treatt, the famous British explorer, took a portage short-wave transmitter and receiver with him on a trip to the wilds of Sudan. Some of the messages were picked up as far afield as America, and regular communication was maintained with London via the Sudan Government wireless stations. The set was operated upon the wavelength of 30 metres, was of extremely small power and weight, and obtained it's power supply from a hand-driven generator. The Major was twelve months on his trip, a British instructional film, "Stampede," being the object of the expedition.

Pirating is carried on to the limit in India, there being over ten thousand in Calcutta alone. The trouble appears to have been aggravated by the fact that the postal officials had been doubtful of their legal powers. However, a successful prosecution of a pirate of high social standing, who was fined £lO, has cleared up the uncertainty, and steps are being taken to prosecute the other pirates.

Beeent figures ot the number of listening licenses in Australia show that there are over 300,000, being an increase of more than ?0,000 for the past year. Queensland is the only State to have a decrease. There are now 48 listeners to every 1000 of the population, giving the Commonwealth fifth position in the world.

With the Now Year, the New Zealand Badio Record has added another section to its instructive pages. This takes the form of the Electric JJome Journal, and covers all features ' that the users of electricity are interested in. The new field will do much to encourage the use of electrical appliances and maintain the. popularity of this magazine.

Tie annual meeting of the. Kadio Society of Christchurch should take place on the 20th of this month, but will; be postponed one week, and all members should make a point of being present. Several of the members have recently been successful In passing the examination for amateur transmitters.

At the local barracks, a short-wave transmitter has been in use for some months now in place of the somewhat antiquated one that operated on high wave-lengths. Thii maintains schedules with headquarters weekly, and this will be developed Very shortly. A class is also being conducted by one of our prominent amateurs to give practical and theoretical instruction in wireless. It is held weekly, is well patronised, and should aid considerably in impartting a useful knowledge to enthusiasts. The routine duties of signallers cover only the acquirement of a thorough schooling in procedure and efficiency in Morse, flag signalling, lantern signalling, etc.

Early in March land and sea forces will combine for practical work at Akaroa, and full use will be made of short-wave, low-power, portable transmitters. # * A valve that will suit one stage in your set may be quite unsuitable for another stage, so valves should not be interchanged unless the manufacturers state specifically that they are suitable for the position in which they will be placed. * * Generally speaking, a, high magnification valve makes a good detector for short-wave work. * * If you use a carrier strap for your accumulator on no account allow the acid to come into contact with this, lor it may break when you are carrying the battery over the carpet one day, with disastrous results. * * Not only is the grid-leak method of detection much more sensitive than an anode bend, but there is much les? risk of microphonic noises with the grid-leak detector. Owing to the very high frequencies used in modern short-wave work the term "megacycle," which meansi one million cycles, is coming into favour amongst experimenters. The word kilo means one thousand, and is generally used for medium radio frequencies. * * Profframmes can sometimes be prevented from trespassing 9 wrnund bv connecting a .0001 mfa., or Smilar small fixed condenser, between the aerial terminal and the aerial 1 in. This acts by reducing t he ° ver Si wave-length of the aerial, but a method, if the receiver is fairly sensitive, is to use a shorter antenna.

"HOLLYWOOD REVUE" BROADCAST.

. with jo. Williamson, By arrangement _ . _ the Theatre This wi" ba ; • rhiiiitrhurcb, and eounto' be carried out in the opportunity try "people who h during tbe o7 attending ,™eatre ple asure .of ffin£ s ß omo°of the Hollywood stars urging the latest hitt.

Notes From Far and Near

2YA. WELfjINGTU-N (720 Kilocycles).

IYA AUCKLAND (900 Kilocycles.)

4 VA, DUNEDIN. (050 Kilocycles.)

SUNDAY

BROADCASTING. TO-DAY'S PROGRAMME. IiY.V. CUIU STOHUROiI. ('.> Bo Kilocycles.l 3 (jin.: Afternoon session— -Gramophone recital. -1.25: Sports results. 5.0: Children's Hour, Aunt Put. tf.O: Dinner session—"Parlophone" Hour. 7.0: News session. 8.0: Relav of special programme from 4\ A, Dunedin, featuring: Opening ceremony of New Town Hall, runedin. Speeches interspersed with the following musical items: (1) National Anthem (arranged by Sir Edward Elgar for chorus soprano solo orchestra and organ) ' S "! OlS '' . ?o? Paine; contralto, Dr. \. h. Overture. "Fingal's Cave (Mendelssohn) (Conductor, Mr .Tas. Coombs). (3) Overture, ' 'Nnbucadonasor (Verdi) (Conductor, Signer Squarise). (4) F( ?stival r ° Pe"™ (Sullivan). Grand Choral with both string and brass instruments and or-an uconipaniment (Conductor Dr. K. V. f.alway). 10.0. Dunce music—"Columbia Hour.

3ZC. CHIUSTCHUKCII. (250 Metres.) 10 am to 11.30: Women's session, entr'acte, '"Chimes of Normandy," American Symphony Orchestra. 10.5: Tested recipes Scrambled veal, Genoa cream, chocolate cream buns; "Second «r .I? Benoist (piano); "Love Wi*' Find the Way. Reed Miller (tenor); "Chant sans Paroles, _ Albert Spalding (violin) ; ' Ihe ."2T. ~ s Waiting for the Sunrise," Frederick Kinsley (organ) ; "La Serenata," Alice Verlet (soprano) ; "Bprber of Seville" overture. Creator and his Band: (a) "Historian y CuentosJota." (b) "Romanza TCxpresiva. American Symphony Orchestra; "Fnntasie Impromptu. Andre Benoist (piano); "Winds in the South," Betsy T.ane Shepherd (soprano); ."Orientale." Albert Spalding fviolin) : "Poor Bufterfiv." Vrederi''k Kinsley (orcan; . "Se Tradirmi tu Potrai." Al'ce Verlet nnd Arthur Middleton (duet): "Daughter of Love," waltz. National Promenade Band. 11.30: Close down.

12 noon: Studio Items, interspersed ivith results of the Wellington Trotting Club's .Meeting at Hutt Park. 5.0: Evening session. Children's session. 6.0: Dinner session. 7.0: News session, market reports and sports results. 7.40: Lecturette—Mr W. M. Jackson, "Gladioli and Gardening Hints." 8.0: Chimes. Overture—2YA Salon Orchestra (Conductor, llr Mat Diron), "Italiana" (Thurbfln). r< !) • Quartet —Melodic Knur, "Tlie Battle Eve" (Bonheur). 8.13: Steel guitar—Mr 1,, iieuvis, (a) "Aloha-oe" (l.iliokalftni) ; (b) "Drowsy Waters" (Alau — —arrgd. Awui). 8.20: Baritone—Mr R. 8. Allwright, "The Old Black-Mare" (Squire). 8.24: Cornet and trombone duet —Messrs W. Sneddon and H. Onlceß. " Kxcelsior" (Balfo). Bell so'o—Mr L. Probert,

"Eventide at the Convent" (Pratt). Humour—Mr A. C. Hannon, "Advertisements" (Weston Slid Lee). 8.40: Soprano —Miss Gladys Erlam, "Let the Rest of the World Go By" (Ball). 8.44: Accordion with banjo—P. IVosini, "Vision of Love" (Curtis). 8.47: Tenor—Mr Sam Duncan, "Sorenata" (Toselll). 8.51: Instrumental — 2YA Salon Orchestra, request item. 8.59 Weather report and announcements. 9.1: Tenor—Mr Frank Bryant, "In an Oldfashioned Town" (Squire). 9.5: Duet— Winnie Melville and Derek Oldham, (a) "Trot Here and There": (b) "The Swing Song," from "Veronique" (Samuels). 9.11: Selection—2YA Salon Orchestra, "Poppy" (Samuela). 9.19: Quartet —Melodie Four, request item. 9.23: Humour—Mr A. C. Hannon, "The Trans-Continental Railway" (Clifford). 9.30: Steel guitar—Mr L. Beavis, (a) "Home, Sweet Home" (argd. Awai); (b) "Pua Carnation" (trdtl.). 9.3G: Old-time song—Mrs Gladys Erlam, "Two Little Girls in Blue" (Graham). 9.40: Bass —Mr W. W. Marshall "Asleen in the

Deep'' (Petrie). 9.44: Accordion with banjo—P. Krosini, "Bountiful Heaven" (Bourdon). 9.48: Quartet —Melodic Pour. "A Mistiike" (Hunt). 9.51: Comedian—Johnnv Marvin. "Hseil To You" (Do Sylva. Brown •ini] Henderson). 9.45: Instrumental —2YA Salon Orchestra, Dance Novelties. 10.2: Dance programme—"H.M.V." Hour.

il p.m.: Afternoon session—Selected items. •I.U: Literary selection by the announcer. 5.0: Children's session, conducted by "Cinderella." 6.0: Dinner session—"Brunswick." 7.0: News and market reports. 8.0: C'hiinea. Orchestral—lYA Orchestral Octet,, conducted by Eric Waters, "Savoy American Medley" (arrgd. Somers). 8.10: Baritone —Mr Hartley Warburton, (a) "Devon for Me" (Kahn): (b) "To a Miniature" (Br&he). 8.17: Record —(accordion and banjo)—P. Frosini, "Vision of Love" (Curtis), 8.20: Kecord (comic) —Sir Harry Lauder, "The Kilty Lads" (Lauder). 8.28: Orchestral —IYA Orchestral Octet, "Spanish Caprice": (1) Alborada (Rirnskv-Korsakov) ; (2) "Variazioni"; (3) Alborada; (4) 6'cena e Cant# Gitana; (5) Fandango Asturiana. 8.31: Humour—Mr Dan Flood, (a) "Telephone Language" (Leo); (b) ''Gimme a Little Kiss" (Smith). 8.38: Soprano—Miss' Matty Youngscm, (a) "Star Vicino al Bell' Idol" (Salvator-Rose); (b) Orchestral Octet, (a) "La Rosita" (Dupont); (b) "Barcarolle (arrgd. Hyde). &.03: Humour—Krnest Hastings. (a) "And Yet I Don't Know"; (b) "Matilda." 9.1: Weather forecast and announcements (evening). 9.3: Baritone—Mf H. Warburton, "Sincerity" (Clarke). 9.7: Piano and vocal duo—Kric and Jack, (a) "Pagan Love Song" (BroWn): (b) "Happy Days and Lonely Nights" (Fisher). O.lßt Whistling with orchestra —Charles Kellog, "Narcissui" (Nevin). 9.18: Soprano 'Miss Matty Youngson, "Sine. Sin*, Birds on the Wing" (Nutting). 9.22: Orchestral—lYA Orchestral Octet. "Walt's from the Bluebird" (O'Neill). 9.30: Humour—Mr Dan Flood, "Masks and Faces" (Ellis). 9.34: Male »horn«—Tb- Round*™. "TMx<» _ Vnirnbond." 9.87: Piano and vocal —Erio and Jack. "Walking with (Coliradl ; (b) "Tip Toe Through the Tulips (Burke). 9 45: Comedian—Wish Wynne. "A Bedtime Story," Parts 1 and 2 (Wynne). ®-f 1: Orchestral—lYA Orchestral Octet. Selection from "Chu Chin Chow" (Norton). 10.1. Programme of danco mufti* I '*- Columbia Hour.

3 p.m.: Chimes. Selected gramophone items. 4.25: Sporting results. 6.0: Children s hour, conducted by Aunt Anita. 0.0: Dinner music—"Columbia" Hour. 7.0: Bession. 8.0: Chimes. Official opening of New Town Hall, Dunedin; speeches interspersed with the following musical Jtems:— 1. National Anthem, arranged by Sir Ldward Elgar for chorus, soprano solo, orchestra, ana organ. Soloist, Miss Meda Paine.: Conductor, Dr. V., E. Galwa.v. 2. Overture, Fin gal's Cave" (Mendelssohn). Oonduc.or. Mr James Coombs. 3. Overture Nabucodonasor (Verdi). Conductor, Signor Sqii'irise. Festival Te Deum (Sullivan)— Chorus, orchestra of stringed Instruments, brass and organ. Conductor, Dr. V, E. Oalwny. 10.0. Dance session— flour.

aVA, CHRISTCHUrtCH. 3 o m ' Afternoon session, Gramophone Re citnl 'S-30: Children's feong Service by children of the Church of England Sunday Schools 6 15: Studio Chimes. 6 30: Selected gramophone items. 7.0 Relay from Chnstchurch Anglian Cathedral. Musical Director and Organist: Dr. J. O. Bradshaw. 8 15: (appro*.) Overture—Victor Symphony Orchestra. "Dance r>f the Hoiirs from "La flloconda" (PonohiellD. soprano—Miss Doris Irvine a) "In Autumn" (Pearl fb > Wrad" fSnross) ft.29: Tenor —Mr W. J. Trexvern, "An Evening Sore;" (Blnmenthal). R.i)3: Quartet —Prisca Strint Quartet, "Minuet from Quartet in C" (Schubert). 8.37: SoI)Tftnn —Miss Merle Parry, Nightingale of June" (Sanderson). ft.4l: Baritone—Mr Dudlev Wrathall, Negro Spirituals (a) "My Lord What a Momin' " (arrgd. Hugo Frey); (h) "Somebodv's KnorVin* at Yo' T>o' " (arrgd. Hugo Frey) fMfl: Recitation—Miss Kathleen Brewins, "The Passing of the Forest" (W. Pember Reeves). 5.51: Piano— Mark Ifambou-tr. "Hungarian Rhapsody No. 2" (Listf). 8.59: Mez^o-soprano—Miss Doris Trvine. "Morning" (Speaks). 9.f): Tenor— Mr W. J- Trewern. (a) "Resolution" (Laßsen): (b) "A Furewel'" (Liddle). 9.10: Quartet —Prisca String Quartet —"Allegro from Quartet in O Horseman" (Hnvdn). 9.14: Soprano —Miss Merle Parry, "Magdalen Bt Michael's Gate" CLehmann). 9.18: Baritone Mr Dudley Wrathall. Negro Spirituals, (a) "Nobody Knows the Trouble I See" (arrgd. Baron); ">) "I Want to Be Ready?' (arrgd. Baron). 9.23: Recitation—Miss Kathlee Brewing. "The Lesson of the Watermlll" (Doudney). 9.27: Selection— Orchestra de I*Opera Ootnique, Paris, "Fete Boheme from Scenes Pitta rescue" (Massenet). ITA, WELLINGTON. It* 4-80: Afternoon session. 6.0: Children's Son* Service,' eonduoted by Uncle George, assisted by the Island Bay Baptist Sunday School Choir. 7.0: Relay of evening service of St. Paul's Pro-Cathedral. Preacher. Rev. Percival James: organist and choirmaster, Mr Robert Parker. 8.15: (approx.) Relay from Aramoho, Wanganul, of concert by Aramoho Methodist Church Choir.

IV A, AUCKLAND. 3 p.m.: Afternoon session—Selected items. 4.0: Literary selection by tho Announcer. U.O: Children's session, conducted by Uncle Leo. 6.55: Keluy <Sf Divine Servico from Strand Methodist Mission. Preacher, Rev. C. 0. Scrimgeour. Song Leader, Mr T. T. Garland. 8.80: (approx.) Relay of Concert by Municipal Band, under the Conductorship of Mr Christopher Smith, from Albert Pork. 4YA, DUNKDIN. 3 p.m.: Relay of service arranged by the Council of Christian Congregations, Dunedln, on the occasion of the opening of the New Town IT all, Dunedin. Kelny from Town Hall. 5.30: Children's song service, conducted by Big Brother Bill. 6.80: livening service relayed from Moray Place Congregational Church. Preacher: Kev. Albert Mead, M.A. Choirmaster: Mr Towns. Organist: Mr McMillan 7.45: fctudio programmo. Overture —Leopold Btokowski and the Philadelphia Orchestra, "Klenii" (Wagner). 7.57: Duet —Lieder and Marhorr (Wagner), (a) "Doch Hun Von Tristan"; (b) "Br Schwue Mit Fausend Kiden" from "Tristan and Isolde" (Wagner). 8.5: Instrumental—"De Groot, Bor and Calve, "Ave Maria" (Kahn). S.B: Bass—Peter Dawson, "The Curtain Kails" (T)'Hurdelot). 8.11: Selection—Leopold fitokowski and the Philadelphia Orchestra. >'innl to "Ootterduminerung" (Wugner). 8.15: Relay of programme from 3YA.