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Exclusive TELEVISION NEWS ejection formerly HUGO GERNSBACK, Editor JUNE 1949 30* U. S. and CANADA New Hesifjn 33 TUNING CAPACITOR 3 V4 SOCKET ■GRID LEAK AND CAPACITOR I S5 SOCKET Within the hat. Interior is perfectly smooth. Hat fits well anti can be worn at almost any angle. Probably young ladies will wear it perched on the back of their heads (see this month’s cover) and youthful gay blades can wear it tipped jauntily over one eye. The phone is over the left ear but can be moved to the right if the wearer desires. The Radio Hat is made in such gay colors as canary yellow, lipstick red, turquoise, chartreuse, tangerine, lavender, blue, and cerise for teen-agers, and in tan, gray, green-gray, and blue-gray for adults. The circuit The circuit of the Radio Hat is shown in the diagram. The 1S5 is connected as a modified ultraudion detector. Its tuned circuit consists of the loop and a small compression-type capacitor with the control knob on the front between the tubes. The audio amplifier is a 3V4 pentode, resistance-coupled to the detector. Bias for the amplifier is developed across its 20-megohm grid resistor. The single phone' is in the plate cii'cuit of the 3V4 where it provides sufficient volume for local stations. The power supply is a small battery pack that supplies 1 % volts for the filaments and 22% volts for the plates and screen grids. The A-battery is a standard No. 2 flashlight cell that will last as long as 20 hours with intermittent use. Replacement battery packs will be available at retailers or from the manufacturer. These are 2% x 2% x 114 inches, housing the A- and B-batteries. The A-battery is held in the pack with spring-brass clips that connect to the battery terminals. The batteries connect to the set through a 3-prong connector and a thin flexible cable. There is no switch. The set is turned on by plugging the battery cable into the socket on the pack. The selectivity is surprisingly good. It separates stations much better than some 4-tube t.r.f. sets. Like most regenerative detectors, this one requires careful adjustment of the tuning control and antenna for best reception. The manufacturer states that when the Radio Hat is put on the market, its tubes will be coated with a tough plastic that will prevent damage from flying glass should a tube be broken. JUNE, 1949 HIRE IT IS THE AMAZING NEW COUPLING CAPACITOR IS5 PLATE BYPASS I S5 SCREEN BYPASS PHONE CONNECTORS HELMET LINER THIN FIBER BOARD 3V4 GRID LEAK DETECTOR PLATE AND SCREEN RESISTORS BATTERY CABLE REVOLVING LOOP GUIDE SOCKET FOR LOOP PHONE CORD BATTERY CABLE This ''chassis" is covered and shielded with foil-coated liner seen in photo at left. NEW AND IMPROVED TRANSISTOR Courtesy Hell Telephone Laboratories New design in the Transistor has resulted in the model above. A thin crystal occupies the central portion of a cylinder, and the two cat-whiskers press on it from the opposite ends. "VV, ae- COMPLETE 2-TUBE RADIO BUILT INTO A HAT Here’s the famous two-tube topper you’ve read about in LIFE. TIME. POPULAR SCIENCE, BUSINESS WEEK, and many other magazines and newspapers, coast-to-coast. Now, you too can own this wonderful “dream-come-true” radio hat, A perfect gift idea! Study these amazing features • • • • At your local dealer, or fill out and mail coupon below: • Covers entire broadcast band within 20 mile radius • Set weighs 5 ozs., hat 7 ozs. • Conceals in lining H" thick • Absolutely mobile...no extra aerial needed • Volume and tone equal to many portables • Regulation waterproof sun helmet... adjustable size, comes in many colors AMERICAN MERRILEI *918 Halsey St., B'klyn 33, N.Y. P/eore send me| | RADIO HATS f~i I'm enclosing $8.65 (check or money order) for each hot. ($7.95, plus 48c (ed. lax, plus 22c postage) [~] Please send me more information about this new scientific marvel. NAML ADDRESS-CITY_____ -2DHE- JIATL LATEST IN RADIO - ELECTRONICS - TELEVISION THE RADIO HAT SEE NEW DESIGN HELMET LINER AND CHASSIS SHIELD BATTERT PACK i.
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