Radio Broadcast (May 1928-Apr 1929)

116 RADIO BROADCAST ADVERTISER New Aero Circuits for Either Battery or A. C. Operation Proper constants for A. C. operation of the Improved Aero-Dyne 6 and the Aero Seven have been studied out, and these excellent circuits are now adaptable to either A. C. or battery operation. A. C. blue prints are packed in foundation units. They may also be obtained by sending 25c for each direct to the factory. Aero Universal Tuned Radio Frequency Kit Especially designed for the Improved Aero-Dyne 6. Kit consists of 4 twice-matched units. Adaptable to 201-A, igg. 112, and the new 240 and A. C. Tubes. Tuning range below 200 to above 550 meters. Code No. U-16 (for .0005 Cond.) $15.00 Code No. U-163 (for .00035 Cond.) 15.00 Aero Seven Tuned Radio Frequency Kit Especially designed for the Aero 7. Kit consists of 3 twice-matched units. Coils are wound on Bakelite skeleton forms, assuring a g5 per cent, air dielectric. Tuning range from below 200 to above 550 meters. Adaptable to 210-A, 199, 112, and the new 240 and A. C. Tubes. Code No. U-12 (for .0005 Cond.) $12.00 Code No. U-123 (for .00035 Cond.) 12.00 You should be able to get any of the above Aero Coils and parts from your dealer. If he should be out of stock order direct from the factory. AERO PRODUCTS, INC. 1772 Wilson Ave. Dept. 109 Chicago, 111. Radio Convenience Outlets Wire your home for radio. These outlets fit any standard switch box. Full instructions with each outlet. No. 135— For Loud Speaker $1.00 No. 137 — For Battery Connections 2.50 No. 136 — For Aerial and Ground 1.00 With Bakelite Plates Now furnished with a rich satin brown Bakelite plate, with beautiful markings to harmonize, at 25 cents extra. See Illustration. At Your Dealers Yaxley Mfg. Company Dept. B, 9 So. Clinton St. Chicago, HI. A-FILTER Here is a new kind of DRY and HUMLESS A-FILTER, ready to hook onto any 6 volt charger, to convert your fila ■v .. ment supply to A. C. No harnesses, no new tubes required. Clip this ad. and send with your name and address today for pamphlet B-s. TOBE DEUTSCHMANN CO. N CAMBRIDGE. MASS. / The Haven of a Sea^Goinj Audion LIFE on Teraina (Washington Island) was one of complete detachment from all the rest of the world. After a thrilling ride through the surf and a safe landing on the beach, a strange sense of having been abandoned comes over you. This is followed, after a few days by a feeling of emancipation. At last life is freed from its great complications, and the mad existence of the cities is but a hazy thing of the past. Living is simplified to the fundamentals. Sleep is not only a matter of the nights but is indulged in during the hot noon-day. Food comes from cans without fuss or garnish. Eating is a necessity — not a habit. Everyone has work to perform and in so doing is called upon to exercise feats of ingenuity beyond belief. There isn't any assistance around the corner. Further and further into the background of the mind fades the worlds beyond the horizon, and greater becomes the content with the life at hand. The steamer from Honolulu arrived about every four months (once it was nine!) and brought mail, excitement, and grief, most times. For the few days the little ship lay off the island, unloaded its cargo of food and supplies, and took aboard the tons of copra we had laboriously gathered, conditions ashore were in a state of crazy confusion. The mail had to be sorted for matters of great importance requiring immediate reply; the supplies to be checked and examined, some to be returned or complained about; sometimes distinguished guests to be entertained, when every minute was so vital to personal affairs. At last the sailing hour arrives, the ship disappears, and the last surf boat is hauled ashore. There are weary sighs, some cursing, a few drinks of gin and cocoanut, and a prayer that the blooming ship will never return! Tabueran (Fanning Island) and Teraina (Washington Island), are Briti s h possessions, situated one thousand miles directly south of Honolulu, about three degrees north of the Equator, and five thousand miles west of Panama. The finest copra in the world is nutted here, but never in large quantities, because the major parts of both islands are wild, prohibiting maximum crops and efficient collection. In 1917 an Englishman was sent from London to place Washington Island on a more modern operating basis and increase production. At Fanning is located the relay station on the ON THE sands behind the coral reefs of Washington Island, in the Pacific South Seas, a thousand miles south of Honolulu and five thousand miles west of Panama, an audion bulb was picked up some years ago. There was a radio telegraph station at Washington Island, and R. A. Travers was the operator. He saw the audion bulb, recognized the handiwork of the inventor, and that night put the bulb in the mail, with the following letter: Washington Island. Via Honolulu and Fanning Island December 1, 1919. Dr. Lee De Forest, New York City. Dear Doctor DeForest: I am sending you by parcel post an interesting valve I believe to be one of you pre-war types. . . . This valve traveled many miles' through the Pacific ocean, bobbed over a coral reef, and came to rest on the sands of this island. . . . Washington island is a wee spot in the wide Pacific, having less than a dozen miles of coast. . . . From wreckage picked up | from time to time, it appears drifting objects j come from the eastward. ... I believe this 1 valve will be of interest in your collection. R. A. Travers. The foregoing paragraphs appeared in an article in the November, 1925, Radio Broadcast as introduction to part of the history of Dr. Lee DeForest. Mr. Travers here writes his side of the story and gives an interesting description and more d'etails of this "wee spot in the wide Pacific" where the "lost audion " was found. Pacific Cable Board's WASHINGTON ISLAND IN THE SOUTH PACIFIC Here the author found the audion which had drifted thousands of miles — from where? Canadian-Australian lines. The cable from Fanning to Bamfield, British Columbia, is the longest in the world, running from the warm waters of the tropics into the slate gray, choppy and cold shallows of the north — five thousand miles! All important communications between England and the Colonies were routed over this cable, and so we find one of the notorious German raiders terrorizing the South Pacific, slipping ashore at Fanning, and with some well placed dynamite, enlarging the area covered by the cable buildings. Off-shore the cable was cut. This may have had