The radio dealer (Apr-Sept 1922)

June, 1922 THE RADIO DEALER 55 NEW NON-MAGNETIC FILAMENT RHEOSTAT The new filament rheostat, manufactured by the Central Radio Laboratories, 303 16th St., Milwaukee, differs from other rheostats designed for radio equipment in that no magnetic material is used in its construction. Genuine Thermoplax of extremely high insulating and heat resisting properties is used for the base. The resistor is made of a special non-corroding alloy which presents a polished surface. Its ohmic value is calculated to give maximum sensitiveness within the required range and its current capacity is ample for the control of any receiving tube without heating. Each turn of the resistor is firmly anchored so that there is no possibility of noisy or scratchy operation. The control shoe is broad and flat with its edges turned up to insure smooth, quiet, step-by-step action without stubbing. The hexagon binding posts are locked in place so that they cannot work loose when connections are made. All metal parts are nickeled. The operating knob is Thermoplax like the base. Its sides are gracefully curved and the top polished. The nickeled pointer indicates the amount of resistance in the circuit. An open position on the high resistance end makes a filament control switch unnecessary. The new rheostat, known asCRL No. 100, can be mounted on any panel, the thickness of which dos not exceed Yt inch. Its overall diameter is only 2}i inches — an important feature because of the limited space usually available. TURNEY CATALOGUE It is a pleasure to look through the catalogue recently put out by the Turney laboratories, for every piece of apparatus of the excellent and modern receiving set which they have placed on the market to be sold whole and in parts, is illustrated with a clearness incomparable. .Lvery line and dot strike the eye. li the Clearness in style of writing can be compared to the clearness of illustrating then the same can be said of the manner in which the apparatus are described. Every thought is grasped at a glance. It is a catalogue to be proud of ; one which should bring them business. The Turney Laboratories have increased uieir sales to such an extent that they have been obliged to take on a large plant, located at 357 6th Ave., Newark, N. J. This plant will give them production of their entire line and will take care, it is believed, of a very large volume of their business. DURKEE Variable Condensers GIVE VERNIER ADJUSTMENT Grasmere, CHAS. H. DURKEE Boro. of Richmond, N. Y. C. KRAMER RADIO CO. 4713 SHERIDAN ROAD CHICAGO, ILL. Mid -fV est DISTRIBUTORS of Radio Equipment REPRESENTING LEADING MANUFACTURERS INTERNATIONAL VARIABLE CONDENSERS The Last Word in Perfection and Beauty of Workmanship Built with the accuracy of a watch by men who are experts. Cost a little more than ordinary — but worth more than they cost. Will work smoothly for years without short-circuiting of plates. Are certain to assure permanent satisfaction. List price : 43 plate, $4.50 ; 23 plate, $4.25 ; 17 plate, $4.00 Liberal discount to dealers. Crystal Detectors Glass enclosed crystal detectors. Universal joint variable contact. Dustproof. Lowest priced glass enclosed detector on the market. Immediate deliveries. Liberal discounts to dealers. List price $1.50. Let us tell you about our SAMPLE. ORDERS consisting of a varied assortment of radio parts which should be in every radio store. International Radio Corporation 42 Branford Place Newark, N. J.