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68 A. B. DuMoNT [j. s. M. P. E.
date our present-day so-called high-definition television will compare only with the crystal detector, head-phone days of radio. At that time, however, there will be a tremendous investment by the public in television receiving equipment, and the obsolescence of such an investment will not be very cordially received. It is necessary, however, that such changes take place, and the problem of the present-day engineer is to design his receiving equipment in anticipation of such changes.
It is impossible for any man to predict the future, but it is possible for the engineering profession to exert every effort to eliminate, if
FIG. 2. Film pick-up panel.
possible, or to reduce to a minimum, every future trouble that may conceivably occur. When this reasoning is applied to our present set of tentative television signal standards, they fall far short of this ideal.
All advances in television receiver design will be directed toward increased picture detail. As the result of engineering activity, it is quite possible that within the next few years developments in intermediate-frequency amplifier design, and in video amplifier design will readily permit the economical reception of pictures having detail corresponding to an 800-line picture. With standards adopted, however, for a 441 -line picture, and with every television receiver on the market equipped with synchronizing and deflection circuits capable of operating at only these scanning frequencies, little advantage can be made of engineering progress.