ONLY A FEW LEFT! U. S. Navy Inter-Communicating Transmitter and Receiver (Jan, 1934)
Modern headsets are just such garbage. When was the last time you saw one that came with a breast plate? And that’s SEVEN POUNDS of quality there. Today you’d be lucky if a headset weighed 7 oz.
ONLY A FEW LEFT!
U. S. Navy Inter-Communicating Transmitter and Receiver
ONLY 50 AT THIS UNHEARD-OF PRICE LEFT
This combination microphone and headset, built under rigid U.S. government supervision, and designed as a regular intercommunicating telephone system, may be slightly modified to match into a radio transmitter and receiver.
The outfit consists of a low-impedance carbon transmitter, securely fastened to a metal breastplate and a set of heavy-duty, low-impedance earphones provided with soft rubber cushions. A specially constructed switch on the back of the breastplate controls the microphone circuit. Twenty-eight feet of heavy conductor cable, terminating in a special brass plug, is furnished complete with this outfit.
The U.S. Government probably paid more than $30.00 for each of these outfits. Yet, a fortunate purchase permits us to sell them to you at $1.98 COMPLETE, as shown in the illustration above. There is no question but what considerable use can be found for these delicate, yet sturdily constructed instruments. Ship. wt. of entire outfit, 7 lbs.
No. B7216 U.S. Navy Telephone Transmitter and Receiver. YOUR PRICE $1.98
FREE RADIO TREATISE
116-Page RADIO and SHORT WAVE TREATISE
Avail yourself now of the opportunity to receive the free 1933 summer edition of our Radio and Short Wave Treatise, No. 26. 116 solid pages of useful information, radio items, diagrams, illustrations, etc. Considerably larger and more instructive than our No. 25 issue. If you had our treatise No. 25 and incidentally all our previous issues, you are familiar with the type of hook we publish: but the new No. 26—what a book! The entire editorial section is new from beginning to end—not an old word remains. Considerable space has been devoted to articles for the radio beginner. This alone is worth its weight in gold. The Superheterodyne principle is thoroughly explained in this issue in clear, simple language. No. £6 is not just another catalog. It contains more valuable and up-to-date information than can be found in any radio text book on the subject.
PARTIAL LIST OF CONTENTS Fundamental Principles of Radio—Ohm’s Law-Discussion of New Tubes—Constructing a Triple Twin Amplifier—Constructing a Tiny A.C.-D.C. Portable Receiver—All About Superheterodynes—Eliminating Man-made Static—Constructing a Two-tube Short Wave “Globetrotter” Receiver—Completely revised and Up-to-date Radio Tube Chart—$3.00 Prize Suggestions— Radio Kinks, Etc., Etc.
WRITE TODAY. Enclose 4 Cents for postage. Treatise sent by return mail.
RADIO TRADING CO., 104 Park Place, New York City