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.RADIO BROADCAST ADVERTISER.
THE NEW C R O S L E Y GEMCHEST
Chinese Chippendale Cabinet design in three colors, Mandarin Red, Manchu Black and Nanking Green. Contains seven-tube Gembox shielded receiver (three stages radio amplification, detector, two audio tubes and rectifier) and the dynamic Crosley Dynacone power speaker (built on a different principle of armature actuation ) Without tubes $94.
THE CROSLEY RADIO CORP. POWELXCKOSLEY JR., Pres. CINCINNATI, O.
Owners of IVLIV, the Nation's Station West of Rockies Prices Slightly Higher
ONLY CENTRALAB
makes resistances like these
The construction and design of a variable resistance is of as great importance as the mere fact that it possesses a certain resistance and will carry a specified current load. CENTRALAB design is such that the resistance unit not only will handle the power but also vary it in a manner so as to derive the greatest efficiency from the receiving set or power unit.
CENTRALAB RADIOHMS
In following resistances: 0-2,000 ohms, 0-50,000 ohms, 0-100,000 ohms, 0-200,000 ohms, 0-500,000 ohms. List price. . .$2.00
The following features distinguish CENTRALAB variable resistances of the Graphite Disc type:
Rocking Disc Contact Noiseless, smooth and easy adjustment
One turn of knob gives complete variation Constant resistance
Insulated shaft and bushing Rigidly built; fully guaranteed
Made in two and three terminal units to be used as Volume Controls, Radiohms and Potentiometers. Special resistance tapers can be had for any circuit. Send for interesting booklet "Volume and Voltage Controls — Their Use."
CENTRAL RADIO LABORATORIES
24 Keefe Avenue Milwaukee, Wisconsin
The
MIDGET
of Many Uses
"HAMMARLUND, JR." has all of the family characteristics — it is as carefully designed and well made as its bigger brother the famous Hammarlund"Midline"Condenser. For neutralizing R.F. circuits; for balancing the units of a multiple condenser; for vernier tuning; for antenna selectivity — and many other places in modern receivers, here is the biggest little condenser value you can buy. Five sizes: $1.50 to $2.25.
Write Dept. R B 5 for descriptive folder showing diagrams of uses.
HAMMARLUND MFG. CO. 424-438 W. 33rd St., New York
Jiammarlund
j; I J PRECISION \.
PRODUCTS
Short Circuit and 2,000 Ohms
sound alike in the phones when you're making a circuit continuity test by t'he "click" method. How would you tell the difference?
The progressive serviceman knows the answer. He uses the General Radio DirectReading Ohmmeter.
Bulletin 931-T Describes It.
GENERAL RADIO COMPANY
30 State Street Cambridge, Massachusetts
274 Brannan Street San Francisco, California
• may, 1929
page 49 •