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RADIO BROADCAST ADVERTISER
Replaces your present dials without alterations to your set
"improves selectivity
Just where you need the finest adjust' ment — a highly geared, absolutely accurate Tuning Control. Accuratune Controls give sharper tuning and improves any set. Particularly valuable for sensitive receivers where sharp tuning is essential. Equipped with pat' ented friction clutch. Requires no set alterations.
★ Your set deserves the best! At your dealers otherwise send purchase price and you will be supplied — -postpaid.
MYDAR RADIO CO., 9-D Campbell St., Newark, N. J.
Accuratune
$3.50
Write for descriptive folder*
MICROMETER CONTROLS
DO FLEX
Jlways HgadMiko
Just one number to log — or eliminate logging and dial by wave-lengths. Made as Bureau of Standards specifies, and guaranteed. Rugged, with wearproof bearings, Built for accuracy. Packed in matched sets. Sealed, to remain untouched until used.
DUPLEX Matched condensers assure you the most out of your radio set. Ask your dealer.
Interesting illustrated folders on request* DUPLEX CONDENSER & RADIO CORP. 46 Flatbush Ave., Extension Brooklyn, N. Y.
Use the Empire Phone Arm
in Your Phonograph Receiver
The Empire Phone Arm is a scientifically constructed combination phonograph re' producer and radio loud speaker unit that has been tested and approved by experts.
It is easy to mount, and is simplicity itself in operation. The Empire Phone Arm is a highly polished nickel unit that is distinctly attractive in appearance.
These reasons combined with the fact that it produces more than satisfactory results, is why it was used in the original experimental models of RADIO BROADCAST'S New Phonograph Receiver.
Complete, Nickel Plated, $12.75
THE EMPIRE PHONO PARTS CO. 2261 East 14th St. Cleveland, Ohio
RADIO
MASTS MASTS MASTS
60 ft. £20.00 40 ft. £10.00 20 ft. £5.00
We pay the freight anywhere in U. S.
At last a reasonably priced mast is on the market, made from select tamarack and pine poles. To fa' cilitate shipping, they are cut in 20 ft. lengths; wire and staples to wrap the joints included; the masts should last 20 years. No circulars or dealers, order direct from this ad. Send money order to
RADIO MAST COMPANY
Big Falls Minnesota
CONDENSERS
For Real Radio Reception
Write for Literature HEATH RADIO & ELECTRIC MFG. CO. 206 First St., Newark, S. J.
Wmm for joining
radio antenna and lead-in wires in one minute without solder, tape or tools.
Many other uses. A million perfect joints have already
been made with these new Wire -Nuts.
Listed by Underwriters' Laboratories. Booklet free.
Ask your dealer for Wire-Nuts. We will send 3 Wire-Nuts post paid on receipt of 25c, B. TORK COMPANY, 8 W. 40 St., New York
^ Tested and approved by Radio Broadcast ^