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The "How Far Have You Heard?" Contest
diagram shown, should enable the experienced radio fan to build a similar set (the 3 coils and coil mounting may, of course, be bought if desired) :
" My set is a home-made one and consists of a detector and one stage of audio-frequency. It is mounted on a bakelite panel 6| inches by 1 5 inches.
" 1 use three honeycomb coils of 35, 50 and 75 turns each, in the primary, secondary and tickler respectively, with a 43-plate vernier condenser across the secondary coil.
"The only thing to bother about my set was to get it to oscillate on 400 meters without an extra amount of current on the detector. To overcome this trouble, I placed a .001 mfd. fixed condenser across the primary of my amplifying transformer which helped considerably in cutting down the filament current.
" I made my own honeycombs and also the mounting, which is similar to a Remler mounting except that the contact is made with spring brass clips instead of brass plugs.
" In tuning, I set the coils nearly closed, get the wave with the condenser, then tune in clearly with the vernier condenser and vernier rheostat. One thing that gives me lots of volume and very little noise is a large-ratio (9 to 1) transformer.
"My aerial, about 30 feet high and 150 feet long including lead-in, is made of the copper ribbon from the field coil of a Ford magneto. It works fine because of its extra surface.
" The set is wired with No. 14 copper wire, and all joints are soldered.
"All measurements for mileage were taken on a Rand-McNally & Co. copyrighted map. This map checked closely with Cram's official radio map.
" Being located in the very northwest corner of the United States and therefore unable to get any stations north or west, 1 consider my aggregate mileage better than the same mileage at some central point. Some stations, such as Atlanta, Birmingham, New Orleans, etc., are as far from Ferndale as they are from any place in the United States."
MR. W1THERBY S SET IS SIMPLE But it has reached out 2500 miles
YOUNGSTER AMONG THE LEADERS
ROSCOE ROBINSON of Ponca City, Oklahoma, who is but fourteen years old, has run up an aggregate mileage of 93,475. He uses a Murad Type MA13 receiver with a loop antenna. Among the stations he hears are KHJ, Los Angeles, Calif., WGY, Schenectady, N. Y., WFI, Philadelphia, Pa., PWX, Havana, Cuba, KDZT, Seattle, Wash., CKKE, Toronto, Ontario, WDAL, Jacksonville, Fla., KUO, San Francisco, Colif., CJCE, Vancouver,
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MR. W1THERBY S HOOK-UP — A GOOD ONE TO TRY