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John F. Rider, recognizing the difficulty presented by the many developments in Radio will, during the year, release a long list of new books especially written for the serviceman. Know Theory! Keep Ahead of a Fast Moving Industry.
Books on this timely subject will cover all phases — including Light — PhotoElectric. Cells — Synchronization.
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The high state of development in this field makes it necessary that you know its theory. Rider will give it to you.
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There will be SIX new books that will tell, in the easy to understand Rider style, how to save time in servicing.
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Rider Manual Volume X will be issued
in the Fall — covering 1939-40 sets.
Many New Features!
404 Fourth Ave. New York City
Leon Adelman, popular CornellDubilier sales executive, whose smiling countenance is known to parts-jobbers and radio men in every state in the U. S.
United Transformer Corp. took possession of a new and larger plant at 150 Varick St., N. Y. City, as of Feb. 1. Offices are there, too, and the setup is thirty times bigger than UTC original home, opened in 1934.
FREQUENCY MODULATION EXPERIMENTAL
(Continued from page 17)
Major Armstrong states that there will be but little increase in the cost of producing a radio set that will handle both frequency and amplitude modulated broadcasts on the ultrahigh frequencies. So from the economic angle there is nothing to feai*.
With the frequency modulated transmissions the dealers will be in a position to demonstrate real highfidelity and static-free reception. With better reception, it is very likely that the public will again turn to higherpriced sets capable of receiving the full benefit of the possible higher fidelity. But all this is in the future.
Also these TJ-H-F receivers can be used to receive the audio part of the television broadcasts, so when these sets for frequency modulation come of age, they will fit perfectly into the tele set-up.
But all these optimistic possibilities about frequency-modulated transmissions are not going to buy today's bread and butter. Smart dealers will recognize it only as something for the future — they will sell today's present receivers and broadcasting system. They will explain to the public that they should buy a radio set today, for they will continue to use it for years to come — that before it becomes obsolete because of changes in the broadcasting system, they will want a new set.
Plug-In
RESISTORS for any set
CLAROSTAT pioneered this handy type of voltage-dropping resistor for AC sets.
Largest line of exactduplicate replacements.
Comprehensive listings including cross-index of different type numbers.
Minimum number of universal types for servicing most sets.
Handy Plug-In Resistor Tester. Indispensable. Only $7.45 dealer's net cost.
J^filr local Jobber to show you the ■£»»■»■ new Plug-In Resistor Tester and complete line. Ask for latest listing. Or write direct.
CLAROSTAT
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AERIALS
ARE
EASY TO SELL -EASY TO INSTALL
Write
for new catalog of Ward's complete line of low-priced manufacturers approved aerials for car and homealso get on mailing list for free magazine packed with selling and service tips.
PRODUCTS CORR
WARD BLDG.
CLEVELAND, 0.
56
Radio Todav