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EXPLAINS NEW WABC HALF-WAVE ANTENNA
The following has been received from Harry 0* Butcher, Director of the Washington office of Columbia:
"In your Business Letter of October 2 you have on page 8 a brief paragraph stating that the Columbia Broadcasting System will construct a novel antenna for the new 50 k. w. WABC trans¬ mitter in Wayne Township, New Jersey. The paragraph continues:
1 It is to be a 700-foot steel tower with the antenna wire proper hanging down inside the metal lattice-work construction. 1
"It is true that we shall have a 655-foot tower made of fabricated steel, but the tower itself, more properly called the mast, will be the antenna. Bell Laboratory engineers and Columbia engineers have cooperated in making tests to determine the practicability of such a mast. It will be the first to be erected in this country, and we believe the first one of its kind in the world.
"Technically, it is known as a half-wave antenna. The base of the mast will rest in a porcelain insulator and the mast will be guyed at only one point, the center. The engineering dif¬ ficulties involved may be appreciated when you consider that the mast will be 100 feet higher than Washington1 s monument.
Will Use Reflector Light
"Special plans for lighting the top of the mast so it may be seen at night by aviators are being drawn by the Bureau of Lighthouses, Department of Commerce. It will be impossible to have a satisfactory gas or electric light at the top of the mast so we plan using a cone-shaped chromium-plated reflector, upon which beams of light cast by four searchlights on the ground will shine consistently at night.
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"We plan to use the same type of antenna for WBT, at Charlotte, providing the one for WABC proves satisfactory, of which we are quite confident. We figure use of this mast will increase the service of the station to the public by 40 to 70 per cent."
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