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How Far Have You Heard on One Tube?
windings are tight and will stay so. Paste-board tubes should be treated with parafme, shellac, or other such substance in order to exclude moisture, so that they will retain their original shape and size. Bakelite or formica tubes are much to be preferred as coil forms. Loose windings experience sudden erratic changes in capacity and inductance, are liable to spring off their forms, cause mechanical annoyances, and are generally inefficient." I
Another contestant, Carrol Nason, of Livermore, California, echoes the "solder everything" advice of Mr. Johnson and cites an interesting example. " Before wiring with copper strip and soldering every joint," he says, "number 18 bell wire was used. This worked fine for two or three days, but after that the set began to hiss.
All the connections were shined up and the
hissing stopped! Another thing that is apt to produce undesirable noises is poor A battery connections, both at the battery and on the rheostat. Keep your eye on them all the time. In conclusion, I might say that it takes some patience to get distant broadcasts, but you feel repaid and then some when you hear an announcement 2000 miles or so away. There is no trick in it. It requires a good set and a decent aerial and a little close tuning.
THE HOLMSES, OF PRESTON, ONTARIO, WITH THEIR HOLM-MADE SET
One other thing: When you use a detector alone you get to know your set much better than if you use two steps to start with. Then, when you do put in one or two steps you have a real set." Mr. Nason's aggregate mileage is 56,477, made with a standard regenerator.
One of the highest mileage reports received is that of Milton L. Johnson, who seems to be bringing in about everything worth hearing from his conveniently central home in Atchison, Kansas. He has heard 175 stations in all and has piled up an aggregate of 110,755 miles. His set is a standard 3-circuit regenerator.
Several reports were received in which the stations heard on a single night were recorded.
RALPH S. RAMSAY, IN MADISON, WISCONSIN, HEARS LOS ANGELES WITH THIS It employs the twin-variometer, variocoupler arrangement, and the tube is a WD-i i