Radio age (Jan 1927-Jan 1928)

14 RADIO AGE for October, 1927 Fig 2. Rear View of World's Record Super 10. Binding posts for a. c. filament not shown. Three by-pass condensers are mounted together beneath the sub-panel instead of two as shown in this cut The New World's Record Super Ten An Unusually Powerful and Selective Receiver with Great Volume and Fine Tone J'HROUGH the courtesy of Mr.E.H. Scott of the Scott Transformer Company, we are able to present herewith an authentic and accurate description of the new World's Record Super 10, which has just made its appearance in the autumn displays of radio dealers. We forecast that this receiver will be one of the leading contenders for the favor of the set building public this season because it includes so many unusual and worth-while features in design. We are particularly pleased over the opportunity to present to our readers this description, as we Itave followed the activities of Mr. Scott and his organization very closely, printing from time to time photos and descriptions of models previous to the new World's Record Super 10. We believe that Mr. Scott has an unusually fine receiver, tve know that he is making a good transformer, and we know that you will like this story of a super-radio, its peculiarities, advantages and performance. The Editor. By FELIX ANDERSON IN enumerating some of the advantages of the New World's Record Super 10, it is probably simplest to first discuss those most prominent, and then consider other departures of interest as they occur in our review. While there are several super-hetrodyne receivers now available, which use radio frequency preceding the first detector, the new World's Record differs from these in a number of respects, and each dissimilarity is based upon intelligent thought and thorough research. It is the purpose of this description to acquaint the reader with the New World's Record Super and such orginal char acteristics as set it apart from other receivers of the same general class. The first impression upon viewing the World's Record Super 10 is that it is a truly pretty bit of radio design. Striking in appearance, the front panel controls kept down to a minimum consistent with efficiency, the receiver as a whole has that finished business-like appearance that all set builders strive to attain. The back panel is equally neat in appearance, having a symmetrical and systematic arrangement of the parts, so intriguing that even the most sophisticated radio engineer will stop to admire the effect. The setting of the dials is easily observed through two portholes, the variation of the drums whereon the dials are located being accomplished by the rotation of two knobs slightly offset and below the portholes. These two controls form the main tuning adjustments, and are the ones most actively used. The left hand major control is that of the RF amplifier input circuit, and serves to rotate the sections of a Remled 3-In-LineCondenser, which are all operated by the adjustment of the common shaft. This ingenious arrangement obviates the necessity of seperate adjustment of each of the RF secondaries, and simplifies operation. The right hand major control is the condenser varying the beat frequency, and is the key, figuratively speaking, to the Intermediate Frequency Amplifier which follows the first detector and RF train: The three refining controls on the panel are non-active in actual operation, the adjustments being made when operation is begun and then left unattended, slight adjustments being made at times when tun ing for long distances. No filament switch appears on the panel, this having been built into a special Carter rheostat directly under the 0-8 volt Jewell filament voltmeter. This rheostat automatically opens the filament circuit when in the off position, cutting out the filament current to the tubes in the set. The knob on the extreme left of the panel is a Silver-Marshall No. 340 Midget Condenser (.000025 mfd) which is used to balance off any inequalities in the input tuning circuitcaused by antennae of unusual characteristics. It is not a critical adjustment. The knob on the right end of the panel is the potentiometer, a Carter 400 ohm, and is labled Modifier. A scaled drawing from which a drilling template can be made is illustrated in the blueprints. The back panel is equally as good looking as the front, especially to radio enthuiasts who admire conservative workmanship and sub-panel mounting. The base mounting Selectone Units, which appear on the market new this season, have several advantages that are readily apparent. All connections to these units are made under the sub-panel, and such connections are inconceivably short and direct. Wiring is eliminated, and the construction of the New World's Record Super 10 is greatly facilitated, even to the extent of being more simple than any other previous model. A bottom view of the receiver (Figure 3) gives an idea of the ease with which the set may be wired. The layout lends itself to the use of either bus-bar, flexible cable or Celatsite as the assembler may prefer. Study of the back panel photo (Figure2) will disclose the use of Benjamin base