1925-05-16 — Page 12

HONGKONG TELEGRAPH: SATURDAY, MAY 16, 1925, (FEATURE SECTION.

TO AMERICA

Booking made on all Trans-Pacific Lines.

Through tickets to any destination in United Tiates or Canada,

Through tickets issued via Suez Route and Europe, All tickets Issued at tariff rates.

Overland trips through North China, Korea and Japan. arranged.

Baggage and Accident Insurance.

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Radio Notes & News:

New Tube Eliminates A-Battery.

to the soraws in the clips by short places of wire.

As an experiment, try increas ing the volume on your loop set by running about 80 foot of ball. wira, or lamp cord around tho picture molding in inductive rola-" tion to your loop antenna. ⠀

Ordinarily theno grid-loak

A now tube that does sway Nevertheless, the French soien-values are correct: for 201 A tubos, with the filament and works tist, who is also a post and writer 2 to 314 megohms; UV199, 3 to 5 directly from the electric light on philosophy and psychology, is megohme; UV200, 1 to 2 megohms system is being dovoloped in the far more interested in those WD11, 3 to 5 megohms; DoForont F. S. McCullough Laboratories at studies than in his electrical DV6, 3 megohms, Wilkinsburg, noar hero, says & researches, and, as he already A good sized screwdriver, if recent Pittsburg message. 5. enjoyon a large income from the magnetized, will pick up screws

F.8. McCullough, who is work- use in Europe of his inventions, that have boon dropped in placos | ing on this innovation, has in» he has no idea, bo says, of stand you cannot reach with fingers or vented several other types of ing on his rights here so far as pliers. tubes for transmission and recop the past in concerned

MANTLA RADIO, clon. One of his transmitting. It is not at all surprising that tubes is rated at 10,000 watts and my inventions have been used is water cooled in au olastic without my consent,” he said. "If porcelain jackot.

Any reward is due to me it is because of the sudden growth of radio solando and the groat com- Plications which have attended its development."

McCullough's now receiving tube uses a beater wire outside in place of the filament. This wire gets its electricity from the ordinary house alternating current.

"

New Weekly Publication.

The first issue of a small Eng- Nsh and Spanish weekly paper, called Radio Manila Digest, is to hand: It deolares:

"Radio Manila Digest" make its bow to the radio public with Professor Latour adds, that he the confident belief of the publish- does not consider his work in the ers that it will help the people of Thus McCullough says the A-radio field as of very great the Islands to more thoroughly battery can be eliminated. If a moment; but he thinks his book, understand the great sciènco of B-battery eliminator is also used,ill make him famous a century organization

"The Mathematics of Emotion," radio. Far Eastern Radio, an formed to givo the entire receiver can be operet hence.

public service, holds.sinoors Great concerns, such as the desire that the public should American Telephone and Tele know as much about that sor graph Company and the Radio vice as possible. A medium for Corporation have immediately the discussion of radio is an come to terms with Professor essential ia a community whore Latour.

only a small porcentage of the

ed without batteries.

Ho has been testing this tube under all sorts of conditions for the past year, and says he will continue perfecting it for another year before putting it on the mar ket. Even to-day, McCullough olaims wonderful results from it. It is a good oscillator and am- plifier, he says, and is about four times as powerful as the or- dinary tuba. Yet it is silent in operation, with not a hint of the alternating current hum.

It is estimated that agreements people knows anything about an already made for the future use art which is now playing in of his inventions have a capital civilization" a tremendous part- value of more than £200,000.

a part which promises to increaso a thousand fold in the next decade,

SPECIAL SETS.

To Go On Fast Trains. Another McCullough develop

Chicago: The Illinois Central mont is the same tube in con- is planning to install superheter nection with radio frequency odyne radio raceivors on all its amplifiers of the tuned and un-fast trains. tuned type. This amplification system is built in close contact with the tube, causing extremely short leads to plate and grid and resulting in high efficiency.

MoCullough is experimenting further on this combination radio amplifier and tube

Just before the Atlantic liner

remote control.

* **

Homeric sailed for Europe, Marie Ivogun, famous coloratura 60- prano, who finished an American This decision has been made from the liner for the benefit of concert tour, sang her last song following successful teate one thousands of radio fans. Station special car between Chicago and wJz broadcast her voice by Dubuque, In. On this trip 15 stations were brought in, during a three-hour trip, while the train

The Radio Corporation is said went as fast as 60 miles an boat.

Despite high voltage wires par- to be negotiating on the construc- MILLIONS SCORNED. alleling most of the road, steal tion of one of the world's most cara in front and behind the powerful statione for the Turkish The Eraptions Better Than Royalties. special and the rumbling of the averument at Angora.

Professor Marcus A. Latour, of train, concerts from these stations government is said to have ap propriated $12,500,000 for the Paris, soon after his arrival here came in loudly. recently, found to his astonish- As a result the company will station. ment that he was entitled to install a set on each fast train, many millions of dollars in

each set to-operate from 20 to 30) royalties and as damage for the pairs of headphones. There will unauthorised use of his patents be no loud speaker, so that pas in the construction of radio sets, sengers who want to read or sleep says & New York message.

may be undisturbed.

Some of the professor's inven- tions date back as far as 1904 to 1911, during which time he was engineer of the General Electric Company at Schenectady, N. Y., long before the era of broadcasting. Since then, being familiar on'y with the smaller French radio industry, ho had not drosmed of the immersity of its development in the United States.

SHORT - CUTS. Things to Know in a Receiver.--

Mount 16-volt 0 batteries bei tween two double binding posts, The lower screws in the binding. posts secure the leads to the battery, and the upper ones are replaced with 6-32 machine. screws to support the coll and also make the positive and nega tive connection.

It appears that nearly every one of the millions of vacuum To try out various fixed con.. tube receiving sets in this country densers in a circut, mount two infringes one "or other of his clips on a piece of hard rubber so fundamental 'inventions, his you can insert the condensers at rights to which have boon will. Binding posts on the in- sustained by the Federal courts. struments then may be connected

PLATE OUTSIDE THE TUBE I

Station WRNY will be the call В new, high-power- letters of broadcasting station to take the air soon in New York. The call

lotters stand for its owners name -Radio News, New York, and. Hotel Roosevelt, New York.

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High-powered transmitting tubos, ranging from 5: kilowatts up to ovon 100 kilowatts, gat no hot that oven forcing air at them will not cool them. It is essential to koop the plato cool for good operation. Sa a water cooling. system has been devised, with the plate taken completely out of the tube and cold water run around it through a rubber hose The vacuum, howevor, is maintained inside the tubs. This photo shows the watercooling process on high-power tubes..

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