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THE WORLD OF RADIO
IMPORTANT NEW DEVELOPMENTS IN RADIO
RECEIVERS TO BE EXHIBITED IN CHICAGO
M
ORE new radio products than at any
period during the last five years, ac-
cording to predictions of radio in-
dustry leaders, will be disclosed to the radio
industry and trade at Chicago, May 23-26,
during the Eighth Annual Convention and
Trade Show of the Radio Manufacturers'
Association.
The big annual "Radio Week" of the in-
dustry, including broadcasters, jobbers and
dealers, as well as manufacturers, engineers,
etc., is expected to draw from 15,000 to 20,-
000 visitors to Chicago. Over 100 leading
radio manufacturers have Teserved space in
the Trade Show, again requiring both the
large exhibition hall and grand ballroom of
the Stevens Hotel. For the overflow of trade
visitors expected, the Blackstone Hotel also
is an official headquarters. Admission to the
Trade Show for view of the new radio prod-
ucts will be limited to the radio trade. The
public will not be admitted, as many of the
new products will not go into distribution
for a few weeks or months. Refrigerators
and other electrical products will also be
displayed by the exhibitors.
In addition to the new tubes, new short-
wave apparatus, new automobile receiving
sets, new loud speakers and amplifiers, new
cabinet designs and other new products are
promised.
Many prominent speakers will address the
Convention. There will be numerous tech-
nical, trade and group meetings during
"Radio Week." At a joint open meeting
Tuesday morning, May 24, with J. Clarke
Coit, of Chicago, President of the RMA, pre-
siding, and following an address of welcome
by Honorable A. J. Cermak, Mayor of Chi-
cago, there will be several prominent speak-
ers.
Honorable Harold A. LaFount, of
Washington, Federal Radio Commissioner,
will speak on "Television in Its Present De-
velopment," including a discussion of many
broadcast and other radio problems.
"How Is Business" is the subject of another
address by Merle Thorpe, editor of "The Na-
tion's Business," of the Chamber of Com-
merce of the United States in Washington.
"Some Broadcast Problems" is the topic of
another address by Harry Shaw, of Water-
loo, Iowa, president of the National Associ-
ation of Broadcasters, whose Board of Direc-.
tors will meet in Chicago during "Radio
Week." The officers and directors of the
National Association of Broadcasters and
other official guests will join with the RMA
in a joint luncheon meeting following the
program Tuesday.
On Wednesday the Annual Membership
Meeting of the RMA, and the election of
officers for the ensuing year will be held,
with President Coit, of the RMA, presiding
and addresses by Frank D. Scott, Legislative
Counsel for the RMA in Washington, and
16
Judge John W. Van Allen, of Buffalo, Legal
Counsel of the Association.
Several Tadio and allied organizations will
hold meetings at Chicago during the indus-
try gathering. On Tuesday afternoon, May
24th, the Annual Convention and election of
officers of the Newspaper Radio Editors' As-
sociation, of which E. L. Bragdon, of New
York, is President, will be held. Also on
Tuesday evening, there will be the semi-an-
nual meeting of the Institute of Radio Serv-
ice Men, the national organization of which
K. L. Hathaway, of Chicago, is president.
During the week there will also be many
meetings of RMA Committees, engineering
and other industry groups.
Reduced railroad rates of one and one-half
fares for the round trip to Chicago on the
certificate plan are in effect for the radio
visitors and plans for their Teception and en-
tertainment are being made by the RMA
Convention Committee, of which Leslie F.
Muter, of Chicago, is chairman. In addition
to the business at Chicago, there is much
entertainment planned for the thousands of
visitors expected. From New York, there
will be a nineteen Pullman Radio Special on
the New York Central, in charge of Leonard
C. Welling. AnorheT Radio Special train
on the Pennsylvania is being arranged by
Walter Perry, of Newark. Special cars from
many other sections, including the Pacific
Coast, are planned.
RCA VICTOR CO., INC., ANNOUNCES NEW
DEVELOPMENT IN RADIO CIRCUITS
NNOUNCEMENT of a new radio
receiver, incorporating radical ad-
kvances in circuit design that are said
to be the most important since the advent
of socket-operated receivers, has been made
to the trade by the RCA Victor Co., Inc.
The new receiver, which will be known
as the RCA Victor R-78, embodies an en-
THE NEW RCA-VICTOR R-78
tirely new circuit, utilizing 12 entirely new
Radiotrons, especially designed to provide the
extraordinary range of frequency response
and volume which is claimed for it. Because
the unique features of the new circuit have
resulted in many major acoustic improve-
ments, the new receiver has been termed the
"Bi-Acoustic Radio." According to its spon-
sors, the new "Bi-Acoustic" circuit provides
twice the power and twice the tone range
of ordinary receivers, hence the use of the
THE MUSIC
prefix Bi. Tone equalization, automatic tone
compensation, dual automatic volume control,
increased musical range and the application
for the first time of the new class "B" audio
amplification to a socket-operated receiver are
all important factors in the new Bi-Acoustic
radio, according to the announcement.-
Among the features of the new "Bi-Acous-
tic" radio which stand out as major develop-
ments are:
1. The application of the new principle
of class "B" audio amplification, which makes
it possible for the first time to provide within
the confines of a comparatively small radio*
cabinet, and at an economical cost, a system
of superior amplification that has an output
of over 10 watts, as compared to the output
of from 3 to 4 watts of ordinary receivers.
This means that a reserve of power is present
in the receiver which gives superior per-
formance without distortion over practically
the entire volume range.
2. Automatic Tone Compensation, by
means of which the reproduction of high
and low frequencies are automatically bal-
anced at every level of volume.
3. A new system of cabinet tone stabi-
lizers which eliminates the "boomy bass" and
the "shrill highs" to preserve the clearness
of the original tones. Special tone chambers
with pipe openings of correct, scientific size
establish the proper acoustical balance of the
entire cabinet.
4. Dual Automatic Volume Control which
is instantaneous in its operation and holds
the volume at an absolute level over the
entire operating range.
5. Extended Tone Range which makes
possible the reproduction of an additional
octave at each end of the tonal scale.
6. The new "Bi-Acoustic" R-78 was es-
pecially designed to utilize the potentialities
of the new Radiotrons, including the new
Mercury Vapor Rectifier, the new Dual Grid
{Continued on next page)
TRADE
REVIEW,
May, 1932