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ARCTURUS HAS Fff
LONG LIFE POWER AMPLIFIER
— that provides undistorted volume, better tone quality, humless reception, — and its life is unimpaired by line surge! Arcturus 07 1H is the first and only A-C Power Amplifier that has proven itself satisfactory in every way — because it is the only Heater Type A-C Power Amplifier on the market. Put an Arcturus 07 1H in your last audio stage — to end frequent replacement — to improve reception...There is an Arcturus A-C Long Life Tube for every socket. ARCTURUS RADIO COMPANY 220 Elizabeth Ave., Newark, N. J.
ARCTURUS
A-C long life TUBES
AmerTran
Push-Pull Power Stage for Dynamic Speakers
For best results, every dynamic type speaker should be preceded by a pushpull amplifier. This is particularly true because they reproduce frequencies as low as 30 cycles and the attendant hum from raw AC on the filaments of power tubes is greatly pronounced unless filtered out by a push-pull amplifier.
The AmerTran completely wired p-ush-pull power stage has been specially designed for dynamic speakers. Consists of type 151 input and
output transformers (2.00 for working out of 2.10 type tubes or type 362. for 171 type tubes). Both the 2.00 and the 362. have the secondary designed for connecting directly to the moving coil of the speakers. Completely wired with sockets and resistances. Also available for cone type speakers and for both 2.10 and 171 tubes.
Licensed under patents owned or controlled by RCA and may be bought with tubes.
Price complete (without tubes) $36.00
(slightly higher west of Rocky Mountains) Write us for hook-up of this remarkable instrument.
AMERICAN TRANSFORMER COMPANY
Transformer Builders for more than 28 years 287 Emmet Street, Newark, N. J.
AGood
Antenna System
wiil improve Your Radio Set/
Few set owners realize how important it is to have a good antenna system. An old, corroded antenna picks up very little energy from broadcasting stations, and the receiver cannot work properly. A Beldenamel Aerial Kit assures an antenna system of high efficiency. Furthermore, it is permanent, because a Beldenamel Aerial cannot corrode.
Bare Copper Aerial Wire Corrodes Rapidly
Beldenamel Aerial Wire is protected against corrosion
Other Belden Radio Products
Indoor Aerial Kits, Colorubber Hookup Wire, Aerial Accessories, Battery Cords, Extension Cords and many other items are included in the Belden Line.
Ask your dealer to show you the New Belden Loudspeaker Extension Cord that is flat and lies under the rug. No unsightly wiring around the room. Does not wear the rug.
Belden Manufacturing Co.
23I2-A S. Western Ave. • Chicago
Radio Broadcast. December. 1928. Published monthly. Vol. XIV. No. 2. Published at Garden City. N. Y. Subscription price $4.00 a year. Entered at the post office at
Garden City, N. Y.. as second class mail matter. Doubleday, Doran & Company. Inc., Garden City. N. Y.