Radio Broadcast (May 1928-Apr 1929)

RADIO BROADCAST ADVERTISER GET YOUR ORDER IN NOW for the new ALL -ELECTRIC SCREEN -GRID SIX Take a set that will perform such feats of selectivity as the S-M 720 does every day right here in New York — get that set as redesigned by McMurdo Silver to work direct from the light socket — with such revolutionary tubes as the new '24's and '45's — and you can take our word for it that that set is going to be hard to get! Your order placed today with Wholesale Radio Service Co. will insure your getting, within a few days, your share of the first sets or kits to reach the East. Mail the Coupon NOW! WHOLESALE RADIO SERVICE CO. 6 Church Street, Dept. RB4 New York, N. Y. Please send your new FREE catalog, listing a full line of S-M kits and parts, as well as all other standard brands of radio products for the set builder. Name WE SPECIALIZE IN ALL S-M PARTS AND KITS Every item in the S-M line, as well as other popular and high-quality radio parts, can be shipped immediately from our tremendous stock. Get out our catalog now. Best discounts to the trade. Address. Wholesale Radio Service Company A Service of Excellence to the Dealer 6 Church Street New York City Town State New Shielded Filtered f "AERO-CALL" SHORT-WAVE CONVERTER Factory-Built, Ready to Plug Into Your Present Radio Set The Aero 1929 Converter is a compact factory-built short-wave adapter equipped with special short-wave coils. It is designed for both A.C. and D.C. sets. Operates perfectly on A.C. or D.C. sets without motorboating, by an auxiliary filter system control, an exclusive feature (patent applied for) It can be plugged into any regular radio set. This amazing radio instrument now makes it possible for you to reach 'round the world — England, Germany. Holland, Australia, Panama. Java and many foreign countries are some that are tuned in regularly on short-wave. (Geo. Morcroft of Pa. received England, Australia and Holland on his initial test. ) Permits you to enjoy international programs and many others from coast to coast that your regular receiver cannot get. What a thrill it is to plug this into a tube socket on your regular set and instantly be in another world ! No change or wiring required. All complete, ready to operate, tubes and coils hidden, no apparatus in sight, except the neat, golden-brown, compact metal cabinet in crackle finish. Size, 9 x 5 y2 x 2 % in. The only converter we know of that really works on all sets. Two models — A.C. and D.C. Write for Catalog and literature, or send $25.00 less 40% and name of your jobber. Model A, without tube, for A.C. sets List Model D, without tube, for D.C. sets List $25.00 INCORPORATED 4611 E. Ravenswood Ave. CHICAGO, ILL. 1 FROST VOLUME CONTROL Gives complete, stepless and wonderfully smooth control of volume and oscillation. Wearproof roller contact arm. Bakelite case and dust cover. $2.00 and $2.25. FROST APPROVED A. C. SWITCH Single hole mount 110 volt A.C. Snap Switch. Tested to 250 volts. 3 amps. Underwriters' approved. 75c. FROST GEM RHEOSTATS Made to deliver a service that is not usually expected from little rheostats like these. Mighty good little rheostats, taking up little space and supplied either plain or with D.C. switch. Easy to solder to. Plain, 75c. With switch, $1.00. FROST BAKELITE RHEOSTATS WITH D. C. SWITCH Cleverly mounted German silver D.C. battery switch is firmly attached to Bakelite panel on back of rheostat, affording quick on and off control of filament current. 2 to 75 ohms. $1.35. HERBERT H. FROST, INC. Main Office and Factory: ELKHART, IND. Chicago San Francisco Without a Doubt The Most Complete Line of Condensers & Resistors No matter what your requirements may be in the fixed condenser or resistor field, you are sure to find an AEROVOX unit exactly suited to your needs. Filter Blocks Buffer Blocks Socket Power High Voltage & Transmitting Condensers Bypass Units "A Power" Units Bakelite Case Moulded Mica Interference Filters Pyrohm Heavy Duty Units Edison Base Pyrohms Tapped Pyrohm Resistors Universal Tapped Resistor "Adjustable" Units Wire Wound Units Center Tapped A.C. Units Grid Suppressors Non-inductive Lavites Grid Leaks & Resistors Resistofortner Kits Resistor Mountings A COMPLETE CATALOG with illustrations and detailed descriptions may be obtained free of charge on request. The Aerovox Research Worker is a monthly publication that will keep you abreast of the latest radio developments. Your name will be put on the mailing list free of charge on request. • april, 1929 page 362 # AEROVOX WIRELESS CORP PRODUCTS THAT ENDURE O