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Radio Broadcast
LIEUTENANT F. H. SCHNELL Traffic manager of the American Radio Relay League. Mr. Schnell has been commissioned a Lieutenant in the Navy, assigned to the fleet on its Pacific cruise this summer. He will experiment with short radio waves and communicate with transmitting amateurs all over the world. The American Radio Relay League has about 20,000 members, excellently organized for intercommunication by radio. Members of the organization have communicated great distances using short wavelengths and very low power
a tremendous saving in the cost of the initial radio installation. The average amateur transmitter can be put together for about $250. while the high power navy set may average somewhere around $6000. It is even possible that if the tests made by nrrl
are quite successful, we may see the Navy changing to low wave sets in preference to the longer wave, high power transmitters they are now using.
The reader should not interpret from this that the Navy is just now beginning to show an interest in the short waves, for it has been working hand in hand with amateurs for some time. Some of the most important experiments ever made in connection with low power transmission have been undertaken through correct cooperation between the Navy and amateur operators. The Navy has been using short wave transmitters on certain ships for many months and as long as two years, ago, the short wave station of the U. S. S. Ohio was heard on the west coast.
The theory of daylight transmission previously mentioned in this article was a direct result of tests conducted by John-L. Reinartz at South Manchester, Connecticut, and Dr. A. H. Taylor of the Naval Research Laboratory at Bellevue, Washington, D. C. The experiments which they started a year ago are still in progress. As a result Reinartz has demonstrated repeatedly that with a low powered transmitter using 2 1 meters, great distances can be covered in daylight. While transmitting from his station at South Manchester, Connecticut, about noon, Eastern Standard Time, his signals have been heard by amateurs on the west coast, in Florida, and in England, and he has several times conducted two-way communication direct with the Pacific coast at noon.
This gave definite proof that the very short waves travel farther in the daytime than they do at night, which is the reverse of what has already been known, that the long
THE 200 WATT TUBE TRANSMITTER For use on very short waves which Mr. Schnell will use for experimental communication while he accompanies the Navy fleet on its Pacific cruise this summer