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RADIO BROADCAST ADVERTISER
115
J&.RADIO
USERS
shuts off or turns on
Automatically
THIS new device makes the A Battery switch on the receiving set automatically turn on and off, either or both the Trickle Charger and B Eliminator as required.
and it's yours for $2.00 ★
Model 13, list price $2.00 operates with 80 percent of the existing receiving sets. However, for sets using Type 199 Tubes, Model 14, list price $2.50 is required. Buy from your radio dealer. If he does not have it, order direct from us, giving name of dealer.
THE RELIABLE PARTS MANUFACTURING COMPANY
2819 Prospect Ave. Cleveland, Ohio
RELIABLE
Automatic Power Control Switch
You are Guessing
No. 135-C
if you do not control your filament voltage by the use of a voltmeter.
Improve your reception and prolong the life of your tubes by using a Jewell 135-A or 135-C portable voltmeter. Send for circulars Nos. 1015 and 1016.
OUR NEW 32-PAGE RADIO CATALOG No. 15-C is just off the press
JEWELL ELECTRICAL INSTRUMENT CO.
1650 Walnut Street Chicago 27 Years Making Good Instruments
KELFORD
Resistance Coupled
Improves Tone Increases Volume Perfect Clarity
Amplifier
$0.00
Bakelite form with all connections and wiring concealed. Completely equipped with resistances and condensers; all metal parts highly nickel plated. Equipped with the famous Kelford "Cushing" Sockets. Can be used with all circuits to increase volume and clarity.
Write for Circular on Amplification
The American Specialty Co.
Bridgeport, Conn.
Don't Neglect this Vital Point
of Contact!
A FEW spare moments, a screw driver and you have a sure, perfect connection between your aerial and lead-in wire. No noise, no soldering, no loss of "distance" due to swinging aerial or corrosion. Tip-Top cannot work loose.
Jobbers and Dealers Write Us!
JAMES F. DOOLAN MFG. CORP. 36-42 West 47th St. New York, N. Y.
25c
Eliminates Antenna
Noise
Examined and approved by Radio Broadcast