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RADIO BROADCAST
Fig. I. Illustrates complete 5 watt radio telephone and buzzer-modulated radio telegraph transmitter. The assembly is entirely made up from stock parts and designed for use with direct current power supply. A motor-generator
is employed for supplying the plate voltage.
types of equipment and in no case exaggerate the results which are hkely to be obtained.
There is a growing tendency, even on the part of employees of the most representative radio companies in the country, to treat customers with little or no consideration. This is more or less natural, for the demand for radio apparatus is so great that if a sale is not made to Bill Jones, Dick Smith races in with a check in his hand all primed to relieve the radio dealer of any superfluous material he may have on hand.
Sales people in radio supply stores naturally become tired explaining to Tom, Dick, and Harry that their stock of What Nots is exhausted and that it is not likely to be replenished for a few days or a week, especially toward the end of the day after the same story has been told many many, times. However, the customer may also have put in a rather strenuous day in his office or at his bench, and is likely to resent the indifference on the part of the salesman.
Indifference of this sort grew during the boom time in business in the late war. The sales people in practically all the stores in the country became very independent, as did the
stores themselves. The natural reaction was that the public soon found that it was possible for them to do without some of the material they formerly considered necessary, and when the stores eventually secured quantities of the material, previously very scarce, the public had learned to do without it. This very same condition is rapidly growing in radio circles, and it is very regrettable. Can we not nip this tendency in the bud?
RADIO DISPLAYS
The accompanying illustrations serve very well to indicate the parts necessary for assembling a complete wireless telephone and telegraph transmitter for use with either alternating or direct current. Where direct current electric light systems are found, it is necessary for the amateur to use a motor generator for supplying the necessary plate voltage for the vacuum tubes. Where alternating current is available, however, a suitable method for transforming and rectifying the current is supplied by units now on the market which offer the dealer a very attractive source of revenue. By assembling a complete transmitter upon the base, having the wiring plainly