Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-06-04
RADIOS MAGNITUDE
SHOWN AT CHICAGO
Exhibition Notable for Many
improvements Made
in Sets.
BY MARTIN CODEL.

CHICAGO, Ill, June 4-This amaz-
ing radio industry, resting fundamen-
tally upon the tenuous basis of quality
and appeal in broadcast programs for
its growth to nearly 81 100000 900
magnitude, presents picture OF grasp
and vigor-grasp for anything that Ia
new and vigor in putting it over. The
expression of these qualities, though
they are perhaps indigenous to Ameri-
can business enterprise generally, Is
found in the adaptation of multitude
of new devices designed to Improve
radio reception.
Three huge exposition floors, covering
10000 square feet of space in the three
largest Michigan avenue hotels, are
filled with bright young men from the
laboratories, ready and willing to an
SWer any kind of technical question
about their products. Alongside these
young men are scores of high-preSsure
statesmen of the highest pressure sort,
who are here TO take orders from the
thousands of dealers gathered from all
parts of the continent to see what is
new in radio.
Essentially the annual Chicago radio
trade show is intended to offer an OPP
portunity for producer and distributor
to get together. Since the dealer is the
publics contact what he sees here is
presumably what the radio-buying pub
lie wants to know about.
Makes Interesting Show.
It is an interesting show, notable
mostly for the exhibition of multitude
of improvements that have been
wrought in radio receiving sets. No
inventor of simpler and better radio
devices need go begging to the radio
industry. 1t takes up his patents If
they are meritoriouS and quickly puts
them into production. The competition
today is a competition between the
ia kerS with newer and better things
tG offer. Radio is probably the least
static of any American business.
Perhaps nothing radically new will
be offered in radio until tubeleSS sets
are evolved and television is accom-
piished. The new things here at the
Chicago show are mostly in improved
circuits, improved tubes and improved
quality of reproduction. Simpler opera
ton, of course, is the order of things.
But as one ineXpert observer remarked
today. the Chicago show is noteworthy
mostly for the many new 'gadgets' it
has introduced.
Screen grid tubes, the shows Sensa-
ton, has obviously improved the ability
to receive programs with truer tone
values. The band pass filter system,
adopted by at least four large manu-
facturers, gives better tone quality be-
fore the detector stage. Shield grid
tubes, giving more amplification and
more stability with minimum number
of tubes, have been generally adopted.
Among speakers the electro-dynamic,
an improvement of last year over cleo
tro-magnetic, has been improved still
further this year by the inductor dy
manic and condenser speakers. The in
ductor dynamic gives more faithful re-
production without outside sources of
currents and with its parts one-half to
one-third lighter.
The condenser speaker is much in
evidence in the hotel Hobbies, on the
exposition floors and in the showrooms.
It is hung in different parts of the room
to give full and ample sound values
throughout.
The foregoing mentioned designs,
tube and speaker improvements and
1nnumerable new accessories are on
display, ranging from more efficient
broadcast receivers to novelties like
table lamps that act as indoor antenna
and are called "lite-tenna."
Kilocycle numbering. rather than the
old arbitrary numbers Of to 100, are
generally found on the set dialS now
Dials are lighted effectively and artis-
tically with the switch-on. Automatic
tuning has been adopted by a number
of the larger manufacturers.
The public will get "a verbal glimpse"
into the doings here on Wednesday
night, when the National BroadcaSting
Co. sends out the program of the an
nual banquet of the Radio Manufac-
turers' Association through a Nation
wide network. Philips Carlin will an
nounce a program that includes Nine
Schumann- Heink, Reinald Werrenrath
and Charles Marshall. opera and con-
cert stars; Billy Jones and Ernie Hare
the Happiness Boys; Gladys Rice,
formerly Of the Roxy Gang, and the
Chicago symphony. Orchestra. The
program win last from $3.50 to 10 pm,
Central standard time.
(Copyrisht 1929. by North American
Newspaper Alliance)