HONG KONG DAILY PRESS, THURSDAY, DECEMBER 18, 1930.
ZABIO
FEATURES
COMMON FAULTS IN RADIO SETS.
NOT ALWAYS DUE TO OBVIOUS REASONS.
HINTS ON LOCATING PROBABLE CAUSES.
When a fault crops up, what do↑ Perhaps the aerial or the earth bas you do test systematically on try become disconnected. When thore various things in an endeavour to is a screened-grid valvo look at the find the fault!
supply to the screen. If this supply is missing, or if the voltage is too low, the tuning will be sharper than usual and volume less.
What is likely to be the matter when the set is noisy First take off the aerial and earth; if the noises go it is clear that they are produced in the aerial or earth circuit. It is possible that the serial or earth wires may bo frac tured or making poor contact some where. Should the sidises persist with the aerial and earth removal, pull out the first value in the sot, "then the second and so on, sons to discover, if possible, which part of the circuit is noisy.
Poor selectivity may be a sign that there is a leakage across a tuned circuit, but, as a rule, when selectivity becomes poor the fault is be found in the aerial circuit.
Intermittent reception is usually the result of a poor contact, Look for a bad grid-lenk connection, n poor switch contact or a faulty "Motor-boating” -in- condenser. dientes a faulty high-tension supply, or a discharged grid battery..
TO-DAY'S WIRELESS
PROGRAMME. BROADCAST BY Z.B.W. ON
355 METRES.
Lack of volume may be due to
11 to 11.30 a.m.-Stock quotations. many things. A run-down battery 11.30 a.m.--Chinese programme.
12.30 p.m.-European programme. is perhaps the most likely fault.
When there is a sudden fall in! 30 p.m.-Weather report, Tocal volume the fault is probably a more serious one, such as a breakdown of one of the parts. You should start with the aerial circuit, looking over the aerial, earth, switch and con- necting wires. Look-over the act for a broken wire, or a poorly
.... Mains Working..
If you find that with one of the valves out the noises cease, then examine that circuit. Look for lcose connections, a faulty coil or transformer, or a poor condenser. fitting connection.
An old dry battery, whither used for high tension or grid-bins, will usually produce noize, and, of course, a faulty connection any. where. Also look over the external connecting wires, plugs and loud- speaker, wires.
When the tuning appears to have become sharper than usual the fault may be found in the serial circuit,
If you have a high-tension mains unit and a hum is heard, try first placing the unit well away from the set. If the hur is still heard put a g-microfarad condenser across the different tappings. An over- loaded mains unit will hum, there fore, try reducing the hum by in creasing the bias on the power valve. This lowers the current, and may cut out the hum.
EVERYTHING
G&C. ELECTRICAL
wwur guarantee
TENACIOUS COATING
KEEPS YOUR SET
AT PEAK
PERFORMANCE
It's not the filament but the coating
on it that **counts -
MADE IN ENGLAND Sold by all Wireless Dealers.
Osram
Valve
Osram Valves
with the "TENACIOUS
WRITE for "OSRAM WIRELESS
time, and Rugby Press news. 2 p.m.-Close down. 5p.m.-European programme of Victor records selected and sup- plied by Messrs. Teang Fook.
Vartoty.
5
K
HAVE YOU HEARD THESE?
Here are lists of long-wave and abort-wave stations which should be picked up by anyone in Hong Kong who hai à modé- rately good net multable for r ceiving such signals. Success In ploking 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 atation not in. cluded in either of these lists.
Accordion Solo-"Italian-Spanish 81.20
LONG-WAVE STATIONS.
Wave length.. (Metres) Station
200 Maniln 277 Bhanghai 280: Tientsin 310 Shanghai 320 Peping
Call Kilo Sign cycle KZI.B. 1,153 K.8.M.8. 1,085 C.R.C. 1,070
·K.R.C. - 90T C.O.P.E
AN
870
880
848
345 Tokyo ..J.O.A.K. 843 Hiroshima J.O.F.K. 355 Hong Kong Z.B.W. 387 Bombay 301" Sapporo 300 Keijo
370 Nagoya
370.4 Calcutta-
V.U.B. 840 J.O.LK.
.830
J.O.D.K. 820
·J.0.0.K. BIO V.U.C
809.9
380 Kumamoto J.0.0.K. 790 300 Bendri J.O.H.K. 770
J.D.A.K -395 Dairen
7:00 .V.U.R....... 754 308 Rangoon 400 Osaka J.O.B.K 750 C.M.B. 199 K.Z.R.M. 788
410 Canton 413 Manila
SHORT WAVE STATIONS.
Kno
CYCLES
Tika (Hong Kong)
by WORKING
4,484 Mon., Wod. & F., 6. p.m. & 3 am. 4,900 0-10 p.m.
5,201 Not regular
6,000 | Tron, Thura, Sat, 8 pm.
7,810 Not regular,
7,780 Daily
8,108 Tue, J
9,220 Not regular 9,603
Not regular W.ZX.A.E. 0.530 Daily 7.10.
STATION
CALL SIGN
€7.66
Dobists (Germany)
AFE...
60.12
Khabarovsk (Russia)
.4.07.
56.7 Namen
GO.
Moscow
REN.
43.5
Bome
MA
5,890 Sunday midnight'
to 8 pm
43.
Porth
0.1.G..
7,147 | Daily 6,80 p.m. &. 11 p.m.
Band-The Jolly Coppersmith."
41.8
Singapore
V.S.I.A.B.
-Arthur Pryor's Band.
38.8
Kootwijk (Holland)
P.C.L
Song" Once Was Yours I'm
87..
Bangkok (Bism)
ISAPI
Somebody Else's Now:"
Sydasy
31.65 Melbourne
#LO.
Mamio Smith.
31.48 Schenectady,
Eindhoven (Holland)
10.
Favourites"-Mario Perry, Song "Clancey's Wooden Wed.'
ding."Stove Porter. Song Christmas Morning де
Clancey's."-Steve Porter..
31.28
Sydney
2.1.0.
81.
Nairobi (Konga)
7.1.0.
23.5
Bydney
2.1.E.
10,526 Not regular
27.8
Bandoorig
PLE
11,020 Midnight-3 am, daily
25.68
Chelmsford (England) 5.8.W.
11,751 7.30 pm. & 9 am. daily, except
Baturday and Sudday..
Song 'posin"-Mildred Hunt
245
Manila
KLII
12,240 Nightly
(Comedienne).
23.36
Schenectady
W.2.X.O.
13,8504. Wed., Fri., Sat.
18,88
Bandéeng
18.4
Kootwijk (Holland)
P.C.L.
Bandonag
16.9
Bangkok
Kootwijk (Holland)
15.74
Bandoeng
P.C.K. P.LE
18.0
Nancy (France)
Pittsburg
W.6.X.K.
Flute Solo-" Wind Amongst the
Trees."-Clement Barone. Humorous Dialogue-"Is Every- 17.4
body in Your Family as Dumb as You Is Amos and Andy.
.161.8 Instrumental-Hawaiian Love."
-Kane's Hawaiians. Instrumental" Hawaiian Rose." 13.03
-Kano's Hawaiians.
.....
Song "When You Come to the
End of the Day"-Paul Oliver (Tenor).
*,
Orchestral Amaryllis.
Vie
tar Concert Orchestra. Organ Solo Dreaming the Waltz Away."-Jesse Crawford. Organ Solo-"Hello, Alohal How
Are You Jesse Crawford. Organ Solo-Barcelona."-JC880
Crawford.
0 to 0.45 p.m. From the Studio:
Children's programine. Planation Songs,
0.43 to 7.30 p.m.-
Stephen Foster Molodies-Ring do. Banjo," "Oht" Lemuel [" "Nelly Bly Of Boys, Carry Me long," "Lou'sianna Bella." "De Camptown Racee.Vic tor Salan Group." Stephen Foster Melodies Open Thy Lattice. Love," "Uncle Ned," Village: · Maiden," "Beautiful Dreamer."-Victor Salón Group. Stephen Foster Melodies"Hard Times Come Again No More:" "Angelina Baker," "Gentle Annie," "Old Dog Tray," "Samo Folks Like to Sigh."-. Victor Salon Group.: Stephen Foster. Melodica-Nelly
Was a Endy," "Jeanie With tha Light Brown Hair," "Oh! Susanna,Come Where My Love Lies Dreaming."-Victor Salon Group: Stephen Foster Melodien- Old Kontucky Home." Victor" Salon Group.
Stephen Foster Melodies" Ola Black Joo."- Victor Salon Group
Stephen Foster Melodies" Mas sa's in Do Celd Ground."- Victor Selon Group.
Stephen Foster Melodies" Old Folks at Home Victor Balon Group.
Musical Comedy Selections. 2.20, to 7.38. p.m
"Show Boat Selections.-Paul Whiteman and his Concert Or chestr "Show Boat.”—Old. Man River
Paul Whiteman and his Concert Orchestra.
Rose-Marie Gems,
Light Opera: Company.
No, No, Nanetto "Gems-Vie
tor Light Opera Company. Orchestral.
17.38. to 8 p.m.→→→
P.LC.
P.LF.
ELS.1.P.J.
9,020 Fr. 8 A., Sat 9 am. & 10 a.. 0,600 Not regular
9,077 Midnight daily
10,102 Daily 6.80 p.m. to midnight 16,804 Dally 7.p.m.
17,280 Daily 8 pm to midnight
17,761 Sundays 7 p.m, & midnight
18,404 Each afternoon
19,220 Daily 5.30-7 p.#a.
19,051 | Daily 8 km.
21,640 Not regular
[Allowance minst be made for "summer-time ” în most Euro- pean countries, which is one, hour ahead of true time.)
MUSIC FROM MANY COUNTRIES
by wireless with
TELEFUNKEN 40
Long range All-Electric receiver with station selector for use with batteries ✨✨ or ⠀ "lighting. mains,
with TELEFUNKEN LOUDSPEAKER ARCOPHON
For Demonstration and further particulars apply to
SIEMENS CHINA CO.
Victor
TELE FUN KEN
"Zamisa-Overture.-Victor- Sym
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Waltz Dream." - International.
Novelty Orchestat se promene nam Irish banaady"-Victor Sem.
phony Orchesten.
8 p.m.-Chinese studio concert. 0p.m.-Weather report, local time, 10,30 p.m.-Close down.
Sent Past Fran: dc A
Office-Pedder Building, 4th Floor. Showroom-27, Nathan Road, Kowloon.
Canton Office- Shameen. Swatow -Gebr. Roese.
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*MAZDA” Valves, large stock newly arrived
RADIO batteries made by new process minimis- ing deterioration "TERTRIX" 150, 100, 60, 45 volts and C. batteries,
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