Indianapolis Times, Volume 37, Number 122, Indianapolis, Marion County, 21 September 1925 — Page 31

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KILOCYCLE NEW WORD FOR AIR FANS TO LEARN

Will Take Place Soon of Wave Lengths, According to U. S. Bureau. Hit Time* Special WASHINGTON. Sept. 21.—1n radio the “kilocycle” is taking the place of “wavelength,” the Bureau of Standards discloses. The making or logging of dials is found to have certain advantages when in newer terms. Already one of the oldest stations is announcing its broadcasts on the “kilocycle” or frequency rating. It is simple, for frequency (waves a second) replaces wavelength (in meters). Asa musician can vary the number of oscillations of his vocal chords, but can not control the length of the sound waves, which vary with the medium, so a radio station can vary the number of oscillations a second and let the wave lengths be what they will. Example Cited A high tenor “C" gives sound waves two feet in length, but the standard rating is frequency, or pitch, in this case 512 vibrations a second. Frequency is the number of waves produced a second, the number of waves on the air after one second of transmission. “Kilocycle” means a thousand cycles, hence a broadcast on a 500-kilocycle frequency produces 500,000 radio waves a second. To aid radio amateurs and experts the Bureau of Standards will issue a table so that at a glance any one may translate from the old rating by “wavelength” into the rating by frequency, and vice versa. Radio waves travel with the speed of light, about 300,000 kilometers a second. This la the sum of all waves emitted in one second. Dividing this by the wave length gives the frequency, dividing by the frequency gives the wave length. Rule Given The bureau gives the simple rule to obtain the frequency when the wave length is known: Divide 300,000 by the wave length In meters. The answer is In kilocycles. Likewise the other way around: Divide 300,000 by the number of kilocycles to find meters. It is interesting that the ratio is the same both ways. One hundred meters equals 3,000 kilocycles; 100 kilocycles Is 3,000 meters. As the new system proposed some time ago by the international and national radio conferences is taken up by the broadcasting stations and placed into effect by the Government In •assigning station frequencies, it will become increasingly important to translate from wave length to frequency to tune. SINGI-iE (CONTROLS Single control receivers are growing in number. Last year, it is said, twenty-four leading radio manufacturers embodied a single-control feature in their receivers.

The Circle Theatre Management INVITES The Radio Audience TO LISTEN-IN On Their Radio Programs EVERY Monday and Friday THROUGH MONDAY iWFBMf FRIDAY Concert 11 to 12 p. m. Program M erchants / i to 8:15 p. m. II eat aild Requested Organ Ftoatnring Light Program played The Circle Concert ~ . ,■ Orchestra unde'r the Company by M,ss Dessa direction of Baka- Byrd, Circle Theleinikoff with as- N Wave Le north atre Organist ' • sisting artists. o gg 8 1 urgawst. , It is the desire of the Circle management to present to the Radio audience only the best of entertainment Talent for these programs is selected with care. It is our constant aim to please and entertain you. Suggestions for these programs are always welcome.

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HENRY FORD IS LATEST CONVERT Flivver King Declares Radio Is Great Thing. Radio is a great evangelist. Thousands of men and women have been influenced by religious uplift a Iks given on the air. The newest convert is Henry Ford. But strange to say, the Detroit manufacturer declares that his conversion is In favor of dancing. Says Ford: “Radio brings excellent dance music into the home and I am in favor of dancing within the home circle. At the present time I am learning all the new steps and recalling many of the old ones. Waltzing to the music of “The Blue Danube" is my favorite, but I am experimenting with the Charleston and all the other new and intricate steps and I must say I enjoy the innovation. Radio seems to be the cause of this fad for dancing in the home, and as the fans say, “it is coming over fine.' “The best of a book is not the

THE INDIANAPOLIS TIMES

By Roy Grove

thought which it contains, but the thought it suggests; just as the charm of music dwells not in the tones, but in the* echoes ,in our hearts.” BIG WINTER PLANS Station WTIC, at Hartford, Conn., is planning a greater fall and winter broadcasting schedule. Saturday and Sunday will be the only silent nights.

See Them on Display at the Indianapolis Radio Exposition

Superiority of the Radiola Super-Heterodyne is an Acknowledged Fact The Super-Heterodyne Is Produced by the Radio Corporation of America Why Not Have the Best? N Indianapolis Electric Supply Cos. DISTRIBUTORS Radiolas Radiotrons For Sale by Dealers Everywhere

Helps For the Amateur

'i OUR safety pins mounted on 1 1* I * be baseboard so the small JA.—J ends will be spaced to act as tube terminal receptacles can be used as a socket for experimental work. The big ends of the pins can be screwed to the baseboard so the screws and the “heads” of the pins will form binding posts. • • • Try using a tree as an aerial and a wire fence as a ground when you take your portable to camp. The aerial binding post on the set is connected to a spike driven into the trunk of a tree. • • • If troubled with hand ca'pacity. place the condenser farther away from the panel by mounting it on two-inch machine screws over which have been slipped I'4-inch pieces of bakelita tubing. • • • When tubes fit improperly in sockets assure good contact by putting a pointed match stick between the socket and tube to act as a wedge. • • • Phone tips and phone-tip jacks will make a battery connector that will save many minutes of sorting the wires. Use the jacks in place of binding posts on the terminal board and fasten the tips on another terminal board of the same size In such a way will insert nicely in' the jacks. The tips of course are soldered to the battery leads. • • • If your set squeals it may bother your neighbors' reception, so don't let it squeal. Find the point on the dial Where this oscillation starts on a given signal, and then always keep it below thus point. • • • It is better to connect your ground wire to the water pipe before it reaches the water meter, if possible, for there is considerable resistance in the meters. • • • If your “B" batteries won’t fit In the cabinet because of the cilps, cut off the binding posts anil solder leads to the stumps left on the battery. • • • Grid leaks, one of the moat important things in a set, wear out and should he replaced every six months.

Radiola 25—One of Many Models

KOISY SET MAY BE CAUSED BY POOR CONTACT I Distant Stations Kept Out When Dirt Works In. Poor contact will make the radio set noisy, and will keep out distant stations The contact should be perfect from the far end of the aerial right through the set to the ground. There are two general types of contacts used in variometers and condensers, as well as some of the other apparatus. Friction Contact The first and most common of these is the wipe, or friction, contact, and the second is called the “pigtailed” contact. The wipe contact will be all right as long as the place is kept clean and there fs no dust or soldering flux that can work into it. On the other hand, the least little dirt may hold the contacts apart, and when the happens the set will not only be full of peculiar little clicks, but it will also be impossible for extremely weak signas to get through at all. Some variometers have a contact between the shaft and a brass bearing plate, which is apt to cause trouble, and the only cure Is to solder a piece of wire to the end of the shaft and then direct to the rest of the set. Wire Should Re Flexible If this is done the wire should he stranded or flexible, and stops arranged on the variometer so that it will not turn too far around and break the wire. The same thing holds for the movable plates of a variable condenser, which frequently cause more trouble than the variometer. They should also have a piece of wire soldered to them. This is called the pig tail, because it usually has a couple of twists in it like the tail of a pig. FRENCH PROTEST French radio manufacturers and the Paris Chamber of Commerce have protested against the .postoffloe department’s purchase of American equipment for its sending station. They say they produce just as good material at home