Show THE SALT LAKE TRIBUNE JUNIOR SUNDAY MORNING JULY Page Eight 1938 28 BOY$ LEARN MUCH ABOUT PLANES Walter Ross prominent memof the Tribune-Telegraairplane club Is shown In the photograph above getting firsthand information on how to operate an airplane His instructor is Jack Douglas authority on plants and plane ber m well-kno- building Not long ago 150 members of the airplane club were taken in big trucks to the airport where they inspected planes were taught what each part of the gigantic' Instrument panel is used for Many other treats and surprises are in store for aviation club members It is not too late to join as new members are enrolling when the club meets in auditoThe Tribune-Telegrarium every Saturday at 9 a m m Do Bees Bizz? Anne my little sister and my cousin Barbara were swinging qne day when Anne said: “1 "hear a bee” Barbara replied: “It isn’t a bee it’s an ant” Anne said: "It isn’t an ant because ants can’t fly and they don’t bizz” KNIGHT JEAN BENNION 12 Salt Lake City - Do you know that parrots sometimes livt to be two three and four hundred years old? Now Radio Has Cone ‘High Hat’ Radio has gone “high-hat- ” Until the other day when anyone was described as “talking through his hat” he would feel anything but complimented as he was charged with not knowing what he was talking about Today however the radio announcer and for that matter anyone having the necessary equipment can talk through his hat a feat whlGh is a real and amazing scientific achievement The miniature transmitter designed for this purpose is the smallest and lightest apparatus of its klhd ever made The complete device weighs only 11 ounces Installed Into the crown of a high silk hat The transmitter uses extremely small radio tubes well known among amateurs as “acorn tubes” because they resemble an acorn in shape and size This midget broadcasting station operates with a frequency of 270000000 cycles per second (about 11 meters wave length) In describing a parade or other outdoor event the announcer speaks Into the hand microphone The transmitter radiates Its radio impulses to an automobile relay station which picks up the waves coming from the silk hat transmitter and relays the ahnouncer’s voice by means of a more powerful transmitter to the broadcasting center The problem of proper power supply for this miniature transmitter also has been solved The transmitter with an output of of a watt Is about furnished with the necessary two-tent- hs - SHORT- - WAV TRANSMITTER METER WAVELENGTH ANTENNA HOLLOW ALUMINUM ROD 6'2mm “ HEIGHT ULTRA- Id Ll'STURNS BARE COPPER Nf 14 COIL DIAMETER Wt ft XVI-10N- 4 7Vi SILK TCP HAT X Rl TIUMMI1I SWITCH SWITCH Battery of somuj mmamome im FEEDS THE 7RAN$ WITTER WTTN ELECTRICAL POWER UIPIEftAMD fSTAGE Of ii 4 Turns is s15 14 mm bake copper wite'fouFMM olt six-vo- MOOULATOO TRANSMITTER small carbon microphone The belt Is further equipped with two switches to control the battery currents and convenient terminals for the microphone cord A single Inconspicuous V'4'OttFMM A THE electrical power from a pair of batteries Installed into a wide leather belt which Is worn by the announcer under his coat At the left side of this belt 18 Installed a battery in form of a cartridge The box at the batright side contains a lt for of filament circuit the tery a tubes the and standard type small-siz- e flashlight battery of one and one-ha- lf volts which is used as exciter battery for the 90-v- 6V0LT BATTER HEATER CUR RENT FOR TUBES cable connects all the circuits With the transmitter and antenna in the hat A hollow aluminum rod sticking from the top of the silk hat is the antenna used to trans- waves to the mit the ultra-sho- rt automobile which is equipped with receiving and sending apparatus The acorn tubes type 955 are of the triode type The dimensions of the tuning circuit coils LI L2 and L3 are as the diagram shows quite small The two colls marked as L4 are to avoid trouble by unwanted radiation The set assembly in the lower box outlined by dashes is the modulator unit which is installed in the center of the leath' er belt so-cal- led Rf-cho- |