Radio today (Apr-Dec 1939)

UNI-DIRECTIONAL pick-up FIELD COMPENSATOR UP By moving up the Acoustic Compensator, you change the Amperite Velocity Microphone to dynamic operation — without peaks. At the same time you reduce the back pickup, making the microphone practically UNI-DIRECTIONAL. With the Acoustic Compensator down, the microphone is BI-DIRECTIONAL ... 120 degrees front and back without frequency discrimination. Rotating the microphone until it parallels the ceiling makes the microphone NON DIRECTIONAL. ES3Cg3EBaESEEgMiEgis a regular feature of these models: RBHk (hiimp); RBMk (200 ohms) LIST $42.00. RSHk (hi-imp); RBSk (200 ohms) LIST $32.00 Sell "Contact Mikes to Professional and Amateur Musicians New high output model can be used in the home. Professional musicians are buying Amperite "Contact Mikes" because "it makes an ordinary violin sound like a Strad". Now amateurs, too, can benefit by the "Contact Mikes". The new HIGH OUTPUT MODEL SKH can be used in the home. It operates on most radio sets made since 1935. It is connected to the phono-input, or to grid ground of detector tube, or across the volume control. Note new clamp, making the mike easy to attach to guitars, ukes, etc MODEL SKH (hi-imp); SKL (200 ohms) $12.00 LIST. Any number up to 5 SKH's can be put in parallel and fed into one input. NEW FOOT PEDAL $12.00 LIST. CLAMP for Contact Mike, $1.00 LIST. FOR TOP-NOTCH QUALITY AND AMAZING RUGGEDNESS, AT LOW COST SPECIFY MODEL RAH (OR SAL) Here's why this popular Amp erite Velocity Microphone leads the low-price field: (1) it is excellent for both speech and music; (2) has flat response without undesirable peaks; (3) reduces feedback; (4) stands up under rain, wind, heat, and rough handling . . . Frequency range 60 to 7500 CPS. Output, —68 db. MODEL RAH (hi-imp.), with 12' of cable; MODEL RAL (200 ohms) with 8' of cable. $22.00 LIST Write for Complete Illustrated Bulletins and Valuable Sales Helps A M Bea ,rr/T 561 BROADWAY. N. Y. AMPERITE 56 MICROPHONES ..HOE BETTER Tn Radio transformer replacement guide and catalog lists power, audio transformers, and Alter chokes for all radio receivers. Standard Transformer Corp., 1500 N. Halsted St., Chicago. Booklet of new 1,100 series test instruments including tube tester, signal generator, and multi-meter. Superior Instruments Co., 136 Liberty St., New York, N. Y. Complete tube complements and IF frequencies for all model radios are included in new handy size book. Price, 25c. Hygrade Sylvania Corp., 500 Fifth Ave., New York, N. Y. Alloy components and melting temperatures of solders and an English wire gauge table are available in a circular from Gardiner Metal Co., 4820 S. Campbell Ave., Chicago. A 56-page catalog with complete listings of all RCA sound equipment has been announced by the Commercial Sound Section of RCA Mfg. Co. All items are indexed and cataloged with photographs, prices, specs, and descriptions. Included is a chart of six basic sound systems covering every standard application. Special sections are devoted to electric chime systems, recording and playback instruments, complete sound systems with single master control units and wired and wireless inter-communication systems. Also included is a directory of RCA sound jobbers. Illustrated catalog of dials, name plates, and control knobs available from Crowe Name Plate & Mfg. Co., 3701 Ravenswood Ave., Chicago. Leaflet of variable voltage transformers with circuit diagrams and ratings. General Radio Co., Cambridge, Mass. A complete replacement guide listing vibrators for auto radios is published by Meissner Mfg. Co., Mt. Carmel, 111. Coaxial transmission line and fittings leaflet showing line construction. Isolantite, Inc., 233 Broadway, New York, N. Y. Bulletin 13-1 showing rotary converter line, ratings, and applications. Janette Mfg. Co., 556-558 W. Monroe St., Chicago, 111. • The combination of high tensile strength that assures a lasting bond, and faster, cleaner work made possible by quick acting flux of pure water white rosin, has given Gardiner Rosin-Core Solders an outstanding reputation for efficiency and economy on radio work by expert or amateur. Yet, due to modern production methods and big sales, Gardiner Solders cost less than even ordinary kinds. Made in various alloys and core sizes . . . and in gauges as small as 1/32 of an inch ... in 1, 5 and 20-lb. spools. Eastern Sales Office and Warehouse: DAVID M. KASSON & CO., 401 Broadway Sew York. N. Y. 4815 S. Campbell Ave.. Chicago. Ill &***§#*** • No drilling Ihru car body, mounts under hood • Rattle-proof with Ward'« patented anti-rattle leature • Streamlined design topped OR WRITE FOR with "antistatic" ball tip SEE YOUR JOBBER FREE CATALOG jrdv br • Gives better reception WARD PRODUCTS Corp RADIO TODAY