The young lady on the cover is the actress Hope Lange.
|It is refreshing to note that not all radio manufacturers in this country
believe that radio broadcasting is doomed to early extinction. It seems certain
that American ingenuity and inventiveness will do much to keep it in the
foreground for generations to come.
This is exemplified by an entirely new radio receiver - the Radio Hat - illustrated on the cover of this magazine. Communication, reception of news, time and weather reports, are a constant necessity to people in this country. So is a light and portable receiver, such as the Radio Hat, illustrated in these pages.
As a new article of manufacture, it will probably cause no little sensation in this country during the next few months. Originally the manufacturer of the Radio Hat believed that the item was geared for the use of youngsters only. It would seem indeed that on account of its low price -below $8.00- it will find a large market in this particular sphere. Boy Scouts and youngsters on their vacations, whether in the country or at the beach, will be avid buyers of an article of this type.
Grown-ups, however, will buy it as a stunt and for emergency purposes or sports, such as hiking, canoeing, and boating.
The editors made a number of tests on the Radio Hat and found it to be an exceptionally efficient receiver, particularly for outdoor purposes. In and around New York City, practically all the locals came in with excellent volume. An efficient modified ultraudion circuit is used and the separation of stations is clean and effective. The set is tuned with a control located between the two tubes on top of the hat.
The device was found to be quite directional and for this reason the rotatable loop antenna should be used, unless the wearer of the hat turns on his own axis to get the best reception.
A number of tests were also made indoors. Reception was fair, even in steel buildings; good in non-steel buildings.
The battery, incidentally, is made up of one 22½-volt B-battery and two 10¢ A-batteries. These are contained in a carton which is kept in the pocket and is connected to the hat with a flexible short lead cord.
Hugo Gernsback, Editor-in-Chief
One of the most useful and eye-catching radio novelties in a long time is the Radio Hat, a new type of personal receiver manufactured by the American Merri-Lei Corporation of Brooklyn, N. Y. It is a sensitive little two-tube set built into a tropical-type helmet with the tubes projecting from the front like two small horns.
Its tuning control is a small, streamlined bar knob mounted between the tubes. The antenna (and tuning inductor) is a 5-inch loop, 1/2 inch wide, mounted vertically on the rear of the crown. It fits into a socket that permits rotation through 90 degrees for directional effects. A single headphone is built into the inside of the hat just over one ear.
The circuit of the Radio Flat 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 circuit of the 3V4 where it provides sufficient volume for