1924-09-20 — Page 13

RADIO NOTES AND NEWS.

·HONGKONG. TELEGRAPH.

SATURDAY, SEPTEMBER 20, 1924.

(FEATURE · SECTION).

MIKES"

DIFFER

Easy to Build Crystal Set - and Cheap.

From the beginning the crystal has never lost its prestigo as a good detector,

Vacuum tulias of all kinds are being used to-day, in all sorts of more or less complicated mannor, yot the crystal romains clearest

piece of the same wire solders: ou for connection to each of the 16 taps. Rosin should be usod as a molder flux, rather than soldering paste or fluid.

08

reads from the tapa to the panel should to no thort and

possible. most rocoption.

offlolant for local

And since the tendency seema to be toward look! broadcasting, through the unification of various stations and the strengthening of many others, the crystal will more and more become the best Jeans for good rocoption.

Oscillation noison do not trouble the fan with a crystal sot. Clearar reception than otherwise in his roward,

The grostost satisfaction of all

Decause the doteotor point is urually adjusted by hand, it should be connocted in the ground side of the circuit, as shown. to avoid body capacity effect and doadoning of signals.

Above all, a good crystal and a good receiving headset aid tho afficiency of the net,

For operation, movo the wiro about the crystal until a sharp click is heard. Thon turn the switch controlling overy tonth

In that a good orystal set can be turn until a rushing noise is produced for loan than $10, ex-hoard.

Turning tha switch for

luding cost of a good sot of the singlo turns will bring the hoadphonon. The sot to bo signals in clearly.

doscribed can be built for this NAVY HAS GERMAN

amount, and

по mechanical

gentun is required to do it.

stal not aro:

PATENT.

Washington: A German patent, The parts for this simple cry-seized by the V. S. Gov. war, ie One piece dielectric tubing. 4ormont during the inches in diameter and 6 inches looked upon as a means for end-i

ing radiation Interforence from long.

receiving nets.

One pound No. 16, D.C.C. wire, Ono crystal, mounted. One fixed condenser, 001 mfd. capacity.

As such tho U. S. navy, which Now controls the patent, has been asked to release it to the public so that such local inter- #Two switch levers.

Sixtoon switch points and four ference may be stopped.

The patent covers a "muflor" switch stops.

or "blocking tube, which is actually a vacuum tubo in a special antiradiation circuit. It was originally inated in 1914 to two ermans, from whom it was taken by the alien property custodian in 1919.

Four binding posts. The entire not can be built on a 6-inch by 8-inch panol and 6-inch by 6-inch hase.

The tuning call, mounted on .70 the

of tubing, consists turns of wiro. Tho frst 60 turns are tapped off at overy 10th turn. The remaining 10

PHONES

вете

The U. 8. Government hought it from tho alion property custodian and turned it over to the Navy Department, whore legal title now resta.

Just as there are all sorts of bo picked up by it and ampli- recoivore, there are all kinds of fisd.

This latest typo is the spark transmitters, and the instrument which shows the most vagarios glow microphone, perfected by of all is the delicate microphone Dr. Fulllips-Thomas, -Mike" for short.

In the photograph above, tho

Mike at first was round various forms of microphones are cylinder, with diaphragms and shown. At lower loft, Douglas such within to pick up sound, Fairbanks is soon talking into a suspended by two springe. In a microphone that rosts on a soft few years it has developed to so cotton cushion to avoid vibration. sensitive an instrument that the This form of Mike is prevaloat heart beats of an insect can in England.

SETS BUILT INTO GERMAN RADIO TRAIN.

Radio transmission from mov- APARTMENTS. Apartment houses in the bottoring trains was tosted in Germany! districts of large American citios recently, It was a combination the signals were made to jump' are being built for the accom of radio and wired wireless in that from the train to the telegraph linos along the track and thence by direct line to any telephone station called.

medation of racio fans.

FREAKS IN GERMANY. The kind of freak sets that came out in America two years

In San Francisco and in New or so ago aro now making their York. recently. auch houses appearanos in Germany. Thero's included specifications for a sot the matchbox receiver, one built in each apartment, along with a into a watch cass and several telephone. One apartment in the others of similar design.

ITALIAN SENATE FANS. The Italian Sonato is consider Ing broadcasting its sessions. Besides having a microphone at. the speaker's stand, there will be a receiving set at the dusk of eacli sonator.

RADIO FOR ESKIMOS. western city called for 100 recoiy- Inhabitants of places farthest ing sots and three other contracts north won't be without radio en- linked the telephone and radiotertainment when Denmark com- receiver as necessities,

RECEIVERS "SET."

plotes its four stations in Greon. land. They won't ho powerful

Distinctive in Style-supreme in quality-right in price-

These are

Co's.

GLYN & Co's.

(44. Old Bond Street, London W.)

Soft Felt Hats

Receiving ruts in Australia are stations but they it help entertain NEXT TIME YOU ARE ORDERING A

to a particular wavelength, tuned a part of the world that has not

as fortunate as thoso in

TINY POWER IN LOOP. A fly climbing one inch up a wall useɛ as much energy as a

to a definito broadcasting station. | been PARIS PREFERS JAZZ. Part of the government license warmer climatos. When Radio-Puris got behind fee goes to the station that gets schedule recently, it eliminated a radio customer. scheduled progratames of Faust and Tannhauser and maintained it's original program of jazz music, turns are tapped off at every}· COMPULSORY RADIO. turn, making 16 taps in all.

A email portable radio receiver The tapa are made by allowing for minore is being perfected by about a half inch of the wire an Engi ishmining engineor. He home-constructed sot that was

to bave its UNG where required, then continu-hopos

HOOKUP AND PANEL LAYOUT OF CRYSTAL HET.

FAN ANNOYS KING. King George couldn't tune out soma troublesome squeals and bowls from his private receiver recently, until authorities found a fan near the palace operating a

by radiating energy. Besides com.

ing winding. The taps are then every minor in England made mitting lese majesto, the fan hadn't

short'obligatory. scrapod clean

and

♫

his set licensed.

GECOPHONE

GELDINGEN

TWO VALVE AMPLIFIER.

I

THE SINGLE & TWO VALVE AMPLIFIERS

CAN BE USED WITH GECOPHONE

CRYSTAL OR VALVE RECEIVING SETS.

BC 2620, LOUD SPEAKER

$48.

THE GENERAL ELECTRIC CO.,

OF CHINA.

QUEEN'S BULIDINGS,

HONGKONG

radio receiving loop would collect in a continuous period of 35 years, reporta Dr. W. Whitney of the General Electric Company at Schenectady, N. Y.

FADING SOLUTION.

Dr. G. W. Piorce of Harvard

University has brought out a new

kind of crystal which can be

HAT WHICH KIND WILL YOU BUY

GLYN" MAKE AND

SATISFACTION

made to vibrato as a constant Glyn's Hats

radio frequency and which is said

are

made from

to prevent the shifting of carrior Pure Fur and will give the

waves or fading.

DEVICE KILLS “HOWL".

wearer distinguished and last-

A new device mado by & Sting wear as all former users Louis arm is designed to

eliminato howls and squeals from would vouch for as well as radio recoption. It is actually a Value and Style.

radiation preventor, keeping the

air cloar of oscillation noises.

from neighbouring recoívers,

NAVAL REPAIR SHIP.

The U. S navy has a repair ship, tho U.S.s. Gold Star. which visits the navy's chain of stations on the Alaskno const and repairs their radio apparatus, It is belived to be the only radio repair ship in the world.

CLEANING CRYSTAL.

Whon the orystal gets grenay and dirty, it may be cloanod by washing and Borubbing with a toothbrush dipped in alcohol. After being cleaned it should be allowed to dry.

+

112 ARMY STATIONS. The United Statos army operatos 112 radio stations, 14 of which are of the higher class. The larger stations have a radius. of 1000 milos at son.

RE-BROADCAST RECORD.

Whon station W.G.N, Chicago, first went on the air, the owners' took phonograph records of tho prograining, Rocently the same program wha robroadcast from the records made.

STORIES BY NAPOLEON, The Sphere publishes in its ourrent mumber the first of two) recently discovered stories by Napoleon which have come into ita possession. It was written at

• |the time of the Egyptian dem- palgo, and has for its theme the career of an Asiatio"adventurur;, The second whiöli

?

GLYNS:

Prices $10.50 $12.50 $14.50

Wm. Powell Ltd.

Solo agents for GLYN & Co.

London.'

OR ORDINARY KIND AND DISSATISFACTION.

Those who have not yet worn

a "Glyn" Soft Felt Hat should call and Inspect the New Styles, They will interest you, and you will then agree as to their Value and Style.

SINGLE & DOUBLE TERAIS

STRAW HATS

TENNIS HATS

TWEED HATS & CAPS

BOWLER HATS SILK HATS

Prices $10.50 $12.50 $14.50

Wm. Powell Ltd...

Sole agents for GLYN & Co.

London.

NEW AUTUMN STYLES

NOW SHOWING

AT

Wm. POWELL, Ltd.

GENTLEMEN'S TAILORS and OUTFITTERS.

md pound story who or long E HONGKONG HOTEL BUILDINGS

to be published later bgune

PEDDER - STRE