1930-07-03 — Page 2

HONG KONG DAILY PRESS, THURSDAY, JULY 3, 1930.

RADIO

FEATURES

FITTING THE GRAMOPHONE PICK-UP.

IMPORTANCE

As the current generated by the pick-up is to replace the rectified or detected radio signals, it is obvious that only the low frequency amplifier portion of the set is required.

OF CORRECT ALIGNMENT.

(BY COHERER."]

"

The simplest and most favoured for this method of connection resistance is for it to be joined across the terminals of the pick-up, so that the voltage may be varied before it is passed to the grid of the first amplifier.

The previous article, explaining the action of the recorded impres- sion af sound on the pick-up, should be sufficient to convince readers of the importance of accuracy of track- ing over the complete surface of the record.

Correct Alignment. Obviously, for the most perfect

Mounting the Pick-up. Templates AT2 supplied with many makes of carrier-arm which render the mounting of the instru ment for best results quite a simple matter. When no template is sup- plied, a fairly good track will be obtained it, before being serowed. down, the base is tried in various positions and the arm swivelled across the turntable until a posi tion is reached where the pick-up strikes a point about half an inch below the pivot of the turntable.

Connection to Sat.

Having arrived at a satisfactory position for the pick-up, the next point to corsider is its connection to the radio-set.

jj

A connection to the input (grid)

Although the quality of reproduc of the first low-frequency valve, is tion of gramaphone records obtain- therefore necessary, and the othered from a radio set employing a connection is taken to the negative pick-up depends as much en correct so mounted that the needle lies in up connections, but where these are,

side of the, filament supply.

tracking as on the electrical quali With, pick-ups lacking in sensities of the instrument, many there tivity, a small biasing voltage in are who are content to just plug this latter circuit is an advantage, the pick-up on an existing tone-arm a grid battery of 4 to 6 volts being as a means of tracking, little know ing that the observation of a few connected in series.

peints in mounting may improve the quality of reproduction by 50 per cent, or more.

Volume Control.

It is frequently the case that the voltage generated by the pick-up is

tortión.

་

That the swivel position of a greater than the maximum input gramophone tone-arm does not that the low frequency amplifier always function perfectly as a car employed will handle without dis-rier for the electrical instrument is becoming increasingly evident To avoid this, and alad to bring from the fact that later models of the volume of sound to within the pick-up are supplied complete reasonable limits when a powerful with a carrier arm with detailed amplifier is used, a volume control instructions, as to the mounting of in the form of a variable resistance the base portion on the turn-table

cabinet. "should be atted.

TELE

We invite Inspection

of the New Improved Type of

TELEFUNKEN 30 W

styled

TELEFUNKEN 31W

Most Suitable for Local Reception.

0.0

results, the instrument should be

a plane tangential to the record grove at the point of contact, ard that this disposition should apply throughout the run of the record. means that the This of course pick-up would have to be constantly. at right angles to the surface of the record; the carrier-arm describ ing an are and not a straight line. Such an ideal, arrangement is un- Steps fortunately not possible. have therefore to be taken to fe duce the degree of deviation from the right angle as much as possible and, moreover, to have such degree practically constant from the edge to the centre of the record.

As the path of the pick-up will describe a steeper curve with a short carrier-arm then with a long one, it is advisable to make use of the maximum distance, commen- surate with the size of the cabinet." between the centre of the tur table and the, mounting of the car. rier.

Most factory-made sets have ter minals fitted for gramophone pick- not fitted, the conversion of radio to gramophone is quite a simple

matter,

TO-DAY'S WIRELESS

PROGRAMME.

BROADCAST BY Z.B.W. ON

335 METRES. “

SALISBURY PLAYERS IN STUDIO AND RELAYS.

11 to 11.30 a..-Commercial News 11.30a.m. to 12.30 pm-Chinese

programme.

12.30 p.m.-Mid-day European Pro- gramme of Victor Recorda selected and supplied by Tsang Fook Music Co.

1.30 p.m-Weather report and local time. Mid-day programme con- tinued.

2 p.m.-Close dosa.

HAVE YOU HEARD THESE?.

Here are lata of long-wave .. and short-wave stations which should be picked up by anyone in Hong Kong who has a mode- rately good set suitable for re- calving such signals. Success in picking up these stations also depends very largely upon tav. ourable atmospheric conditions. Readers are invited to add to this list should they succeed in picking up any station not "in- cluded in either of these lists.

LONG-WAVE STATIONS.

Wave "length

(Metres) Station

260 Manila 277 Shanghai 230 Tientsin 310 Shanghai

..

+ to 8.30 p.m.-Childrens pro- gramme. Aunty Pat," Uncle Dick, and Uncle Jeff will entertain'

the Kiddies.

6.30

to 8 p.m.-European pro- of Victor Records gramme selected and supplied by The Trang Fook Music Co. "William Tell-Overture Arthur

Pryor's Band. "Letter of Love" and "At Even- Mischa Elman, Violin Solo and Piano by Josef Bouime. Simple Confession and "The Sweetest Story Ever Told," Neapolitan Trio.

"

T. C. C.

FIXED CONDENSERS

FOR

Accuracy Dependability

and Long Service

"

THE WORLD-FAMED RADIO COMPONENTS

IN

GREEN

CASES

OBTAINABLE AT

SINCERE'S

SOLE DISTRIBUTORS

Call.

Kilo- Sign .." cyclo K.Z.I.B. 1,153 K.S.M.S. 1,085 C.R.C. 1,079 K.R.C. 907

If a

320 Peping C.O.P. 845 345 Tokyo J.O.A.K. 870 353 Hiroshima J.O.F.K. 250 848 355 Hong Kong Z.B.W. 237 Bombay V.U.B. 840 301 Sapporo J.O.L.K. 830 306. Keijo

J.O.D.K. 820 370 Nagoya

J.O.C.K. 810 370.4 Calcutta V.U.C. 809.9 380 Kumamoto J.O.G.K. 790 300 Sendai J.OH.K. 770 365 Dairen. J.D.A.K 760

398 Rangoon V.U.R. 754

400 Osaka

410 Canton

413 Manila

SHORT-WAVE STATIONS.

"J.O.B.K. 750

O.M.B. TR9 K.Z.R.M. 726

Gems from Tales of Hoffman

and Ctems from Mignon," Victor Opera Co.

and." For "You, You Alone"

You," John Boles and Orches tra.

"Love Everlasting " and "In the Days Gone By Victor, Salon Orchestra.

Prison Song" and "Serenade,” ·

Amelita Galli-Curci. "Selections from Mefistofele" and

"Medstafele," Creatore's Band: Waltz in C Sharp Miner and "Etude in A Flat Major, Alfred Cortet,

7.30 p.m.-From the Studio, n Bianoforte interlude by Mr. Ronald Paget Musicial Direc tor, Salisbury Players:..

(a) Rustle of Spring (Sind-

ing).

(b) Carmen Selection" (Bizet). (e) Loose Elbows (Mayere). 7.40 p.m.-Gramophone programme

continued.

"A Little Posy!" and "My Sun-

shine," Enrice Caruso "Fogliacci-Fantasy," Marek Weber

and his Orchestra.

S to 8 p.m.-Chinese programme. 9 p.m.-Weather report and local time. Chinese programme con- tinued,"

10.30 p.m.-Close down.

STAR

COMMENCING MONDAY

THE GREATEST MYSTERY SHOW EVER IN HONG KONG

•

THE GREAT MAGICIAN

NICOLA

BEAUTIFUL GIRLS-MUSIC-MYSTERY-COMEDY.

1,000 NOVELTIES 1.50·

500 SURPRISES

150 STARTLING

ILLUSIONS

OF GORGEOUS SCENERY AND

TONS EQUIPMENT.

A GORGEOUS REVCE OF INTERNATIONAL WONDERS

BUY BRITISH & BE PROUD We have just unpacked a Shipment of

ALUMINIUM BASE-BOARD & PANELS. Suitable for Short Wave Receivers and other ssta that require Screening

OTHER RADIO & WIRELESS PARTS (Guaranteed British Made).

ORIENTAL COMMERCIAL & Co.. LTD.

BANK OF CANTON BUILDING,

Tx£. 24405.

NOT A NOTE

IS LOST-

So Perfect are the Reproduction "Qualities LOEWE FE 63 9 tüber

is used

REQUIRES FRAME AERIAL ONLY WITH NEW BARIUM TUBES, CAN ALSO BE USED WITH LOEWE SHORT WAVE ATTACHMENT.

set

STATION

CALL BIOX

KILO

TIME (HONG KOxo)

OF WORKING

67.65 Dobintz (Germany)

A.F.K.

4,494 Mon, Wed. & Fri, 6 p.m. & 2.

66.7

60.12 Khabarovąk (Bussis)

Nanen

RA..

4,000 | 0-10 pm S

A.G.J.

5.201 Not regular

50.

Мовсот

B.F.N.

6,000 Tues, Thurs., Sat., & p.m.

Demonstration Hours:

11-11.30 a.m.

12.30-1.30 p.m.

5-5.30 p.m.

43.5

41.3

Reme Ferth Singapore

1.M.A..

6.306 Sunday midnight

7.8.1.1.B.

7,310 Not regular

37. Bangkok (Slam)

32.v

Bydooy

2.B.L.

81.56 Melbourne

3.1.0.

31.13 Schenectady

31.20 Eindhoven (Holland)

P.C.J.

31.28 Sydney

Z.F.C.

81. Kairobi (Kenya)

7.1.0.

0,677 Midnight daily

28.G Sydney

2.M.E.

10,626 Not regulir

27.8

Bandoeng

P.LL

11,020 Midnight--8 am, daily

25.53 Chelmsford (England) 5.8,W.

11,781 7.30pm. & 8 am, daily, except

24.5

Manila

KLIR.

12,240 Nightly

23.35 Schenectady

W2X.0.

12,850 4m, Wed, Fri, Sat.

18.88 Bindoong

P.LO.

18 Kootwijk (Holland) POL

174 16.9

Bandoong

Bangkok

TELE

18.3

-KEN

16.88 Halsen (Holland) :

Kootwijk (Holland)

15.74 Bandong

15.5.Nancy (France)

13.83 | Pittsburg

P.LE. H.8.1PJ PKL

P.OK.

18,404 Each afternoon

P.LE.

19,361 | Daily 8 km.

WAX.K.

21,540. Not regular

38.8. Kootwijk (Holland)

P.C.LL

7,142 Daily 8.20 p.m. & 11 p.m..

7,730 Daily 11 p..

H.SAP.J. 8,108 Tues. &, 9 pm-1 s.,

3,230 Not regular

9,503 Not regular

WX.A.F. 9,530 Daily 7.1.

9,520 Fri. 3m, Sat. 3 a.m. & 10 a..

0,500 Not regular

Saturday and Sunday

16,102 Daily 6.30pm, to midnight- 16,804 Daily 7 pm..

17.280 Daily 8 pm to midnight

11,751 Sundays7 p.m. & midnight

17,700 Delly 10 p.

19,220 Daily 6.30–7 p.m...

During demonstration hours expert European advice is given

on all Wireless matters.

Loewe R 533 A.C. set $126 without Loud Speaker, with Loud Speaker $150-

gives splendid volume.

"Pertrix" High Tension Dry Batteries

150 volts, 100 volts, 60 volts and 45 volts. Heavy Super Duty and Grit Batteries 9, 12 and 30 volts.

NEW PARTS, RECEIVING SETS. and LOUD SPEAKERS.

CANTON TRADING ASSOCIATION LTD. CARL SCHROTER, Manager-5TH FLOOR, CHINA BLDG. TELEPHONE 24610.

SIEMENS CHINA Co..

PEDDER BUILDING, 4TH FLOOR, HONG KONG.

Bhowroom!-

KOWLOON

PEKING BUILDINGS,

NATHAN BOAD.

Also Obtainable- Mesura. WAH HEI ELECTRIC CO.,

185, DES VEUX BOLD. HUNG MING ELECTRIO CO.,

157, Dra Yarr ROAD.. ANDERSON MUŠIO Co., ST. GEORGE'S BUILDING, ICE HOUSE STERET,