Radio Broadcast (May-Oct 1922)

Record Details:

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RADIO BROADCAST ADVERTISER TYPE C-300 GAS CONTENT DETECTOR ^5 oo TYPE C-301 HIGH VACUUM AMPLIFIER $6 so The Heart of Your Home Receiving Set AMPLIFIES AS IT DETECTS — enjoy clear reception by using Cunningham Tubes Cunningham Detector Tube known as type C-300 insures clearest reception for all radio messages, concerts, press and weather reports. The rigid specifications to which these tubes are built in the General Electric Laboratories determine their uniform operation and perfect clearness. Cunningham Amplifying Tube known as type C-301 is conceded to be the most efficient amplifier ever produced. For complex and multi-stage circuits, freedom from distortion and absence of all tube noises as well as for the operation of loud speaking telephones and devices requiring considerable power, this tube has no equal. If your dealer cannot supply you wiite us direct for the name of a Radio Dealer who can. PATENT NOTICE Cunningham tubes are covered by patents dated 11-7-05, 1-15-07, 2-18-08 and others issued and pending. Licensed only for amateur or experimental uses in radio communication. Any other use will be an infringement. Trading as AUDIOTRON MFG. COMPANY 248 First Street, San Francisco, California 154 West Lake Street, Chicago, Illinois The trade mark GE is the guarantee of these quality tubes. Each tube is built to most rigid specifications.