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Big boy — you've learned your service lesson well when you've memorized this page. For it leads on to page "P" for PROFITS and page "S" for Success. Be wise — stick to CENTRALAB for ALL replacement work.
A. Resistor strip on inner circumference
B. Non rotating metal band
C. Oilless wood be
A. Center core of resistance material
B. Core & jacket fired together
C. Pure copper end contact
Gentsalab
Milwaukee, Wis.
BRITISH CENTRALAB, Ltd.
Canterbury Road, Kilburn
London, N.W. 6, England
CENTRALAB
68-70 Rue Amelot
Paris, France
Volume Controls
Fixed Resistors
Sound Projection Controls
SERVICE NOTES
(From page 62)
5. Grounding rear edges of the hood when using roof aerial
6. Ground the steering column, if necessary, especially in Chrysler ears and in cars where the distributor suppressor is omitted
"If caution is used in securing better ground connections at the above points, the balancing of the Magic Eliminode and elimination of interference become a very simple and interesting procedure."
WHAT RESISTOR TO USE
* On page 46 of this issue is a chart compiled by the editors of Radio Today showing how to determine the values of resistors for various radio purposes. It tells what any two of the following are, if the other two are already known : RESISTANCE, CURRENT, VOLTAGE, WATTAGE. No calculations are required.
ZENITH SHADOW METER
* Circuit for the shadowgraph tuning meter in Zenith 12-L-57, 12-L-58, 16-A-61, 16-A-63 sets differs widely from conventional method.
A separate tube is employed to operate the shadow meter mechanism. AVC control voltage is applied to grid of 6C5 tube. As AVC voltage goes negative (as station is tuned in) the current in the plate circuit decreases causing the shadow to narrow.
CONDENSER CARE /
DON'T let excessive humidities and temperatures worry you!
Cornell -Dubilier Electrolytic Capacitors, triply sealed, are scientifically designed to withstand the most abnormal summer conditions.
Retain your customer's confidence by insisting on C-D electrolytics. Available in a complete capacity range from 25 to 500 volts D.C., at all CD authorized distributors.
THE MOST COMPLETE CONDENSER LINE IN THE WORLD
WET & DRY ELECTROLYTIC • MICA • PAPER • DYKANOL
CORNELL-DUBILIER
CORPORATION
4360 BRONX BOULEVARD NEW YORK
R0IM0 PARTS
Zenith tuning meter circuit.
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1 S33 W. Jackson Blvd. I Chicago, Illinois
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Radio Today