Radio Broadcast (May 1929-Apr 1930)

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usm I the opinion of George Lewis, vice-president of the Arcturus Radio Tube Company, the success of the 245-type power tube Axcturus 145) will put a stop to the expensive clamor for higher-powered receivers. The way in which the demand for greater power output changed with time is shown in Fig. 1, and Fig. 2 gives Mr. Lewis' figures which show the relation between power output and cost of home-made B-power units. It is possible to build a 90-volt B-power unit for about $20.00 (retail cost of parts), a 180-volt power unit for $30.00, a 250-volt power unit for about $45.00, and a 450-volt power unit for about $120.00. In other words, a supply device that will furnish enough power for two 145-type power tubes in push-pull can be constructed for less than fifty dollars while a similar device for a single 250-type tube, which would furnish approximately the same undistorted power output, would cost over twice as much. "Proportionate savings will DYNAMIC SPEAKErt be experienced by manufacturers," says Mr. Lewis. Readers of "Strays from the Laboratory" may recall that in that department appeared Mr. Lewis' statement that the usefulness of a tube increases according to some "high-powered" function of the number of elements within the glass bulb. This statement, appearing at a time when many thought the screen-grid tube was a "dud," did not create the impression it should. Those who scoffed at the screengrid tube will probably change their tune in 1929 — this four-element tube will probably be the general-purpose tube of the next few years. Who knows but that the receiver of the future may be a threetube set with a single stage of screen-grid r.f. amplification, a screen-grid detector, and a pentode power tube? No Tube Shortage in 1929 Everyone knows that 1928 saw an enormous shortage in tubes and nearly everyone is wondering whether or not 1929 will see similar difficulty. After examining many statements from all of the well-known tube manufacturers about their expanding production plans, we believe that there will not be a tube shortage in 1929.. According to M. F. Burns, sales manager of E. T. Cunningham, Inc., there will be ample tubes for all present and contemplated receiver sockets in 1929. "The Cunningham organization will produce as many tubes during the first six months of 1929 as during the entire year of 1928, the banner year in the company's history. Our company delivered 61 per cent, more tubes in 1928 than in 1927, during which time production facilities were increased consistently until we were able to enter the present year with production capable of meeting demand. "At present our personnel has been increased to 5000 employees, with factory space and equipment added to maintain full schedules. We are providing a tube supply well in excess of the trade's most optimistic estimate of the market's growth," he declared. Readers may find other signs that there will be no dearth of tubes in the following items gathered from various sources. A new plant has been projected for the Perryman Electric Company, Inc. It will cost $300,000, will have a capacity of 50,000 radio and electric tubes, and will double the company's output. Unfilled orders (May 13, 1929) amounted to 2,000,000 tubes. Daily production is expected to be at the rate of 25,000 a day by September 1. The Hygrade Lamp Company, of Salem, Mass., which produced 5000 tubes a day in May, expected to be in daily production of 10,000 tubes by the middle of July and 15,000 tubes by September 1. Large orders on hand and demands from large set manufacturers have forced the Cable Radio Tube Corporation to add to their Brooklyn plant. The new plant is located at 80-90 No. Ninth Street, Brooklyn. The daily capacity of the Cable factories is now 25,000 tubes. The Schickerling Radio Tube Corporation has been incorporated in Delaware to acquire the business and assets of Con rad Schickerling, Inc. To provide for the expansion of the company's Newark plant, the company will offer 100,000 shares of no-parvalue capital stock. The principle 4140 120 £ 40 o 20 n 1 v ■ 1 ■ 1 • Curve showing increase in cost of power suppfy — cnninmcnf ivifn VYiltloO lit the associa powers f ed with ' 'enerally .nese vol tage I 100 200 300 400 500 PLATE POTENTIAL IN VOLTS Fig. 2 600 product of the company is the "Noblow" radio tube. The CeCo Manufacturing Co., of Providence, R. I., maker of radio tubes, in a balance sheet issued as of March 31 (end of its fiscal year) shows current assets in excess of $600,000. Cash on hand and in banks exceeds one-half million dollars; the remainder is in call loans. The ratio of current assets to current liabilities is as of 6 to 1. Patents, processes, and trademarks are carried at only one dollar. The CeCo Manufacturing Company has just completed plant improvements costing more than $500,000. Its new factory covering three and one-half acres will be occupied this month. It will have a capacity of 45,000 tubes daily. In addition to the Providence, R. I., plant, CeCo has purchased recently a property at 1312 South Michigan Roulevard, Chicago. It will be used as district headquarters office for the territory surrounding Chicago, and warehouse facilities will be added. Financial Statements of Tube Manufacturers The data in this table have been gathered from various sources, chiefly from statements issued by the companies in question and from announcements of new stock issues — of which there are many. These figures have been obtained from sources believed to be reliable, but are not guaranteed. TUBE MANUFACTURER Ken-Rad Corp, Inc. DeForest Radio Co. Northern Mfg. Co. Arcturus Radio Co. Cable Supply Co. Marvin Radio Co. Perryman $976,486 119,670 1,096,323 1,029,624 1926 1927 1928 (First Quarter) 1929 6 mos. ending Mar. 31, 1929 July 1, 1928 to Jan. 31, 1929 1927 1928 1928 1928 1928 3 mos. ending Dec. 31, 1928 $392,380 315,213 347,010 138,675 176,829 191,072 (77,998) 93,909 92,829 263,030 207,581 177,017 SHARES OUTSTANDING 150,000 • JULY 1929 5 s 0 820,543 150,000 50,000 (pref) 600,000 200,000 146,000 250,000 • 177