The Indianapolis times. [volume] (Indianapolis [Ind.]) 1922-1965, 1928-02-28

WAYS and means for accom-
w modating million more
radio broadcaSters, without interior
ing with each other and with less
interruption from static than here
tofore known, are proposed by DR..
Lee De Forest, through an extension
Of the short wave channels by double
tuning in both transmitting and re-
ceiving apparatus, so as to afford
plenty of room for all.
The constantly increasing en-
beavers of numerous industries TO
secure allotments and the right 10
use short wave lengths in their
operations is making it impossible
for the Federal Radio Commission
to meet all demands along this line,
as there are only 5000 channels of
short wave communication now
available between 200 meters and 10
meters, under present operating
methods, for the whole world. DR..
De Forest has made it apparent,
however. that at least 100 channels
for each of the present Short-wave
- operating waves may be opened up
for use by system of heterodyning
or double tuning" in both trans
hitting and receiving sets, so that
100000 and more channels can thus
be created to meet the rapidly
growing needs of Short-Waye COM
munication.
by means of system of double
tuning, this problem can be solved
very satisfactorily for all" says the
inventor of the radio tube.
Taking the railroads as one
group, for example, the fifty-meter
wave would be sufficient, with this
system, to cover the needs of 100
or more railway organizations.
Another wave, only few kilocycles
away, might be assigned to another
industry and by means of double
tuning become available to more
than 100 different companies in
that activity. And so the assign
mentS might go on almost indefi-
nitely throughout the immense new
field opened up by the application
of this system.
system, the frequency of operation
is about 5000 kiIocycleS, and hence
channels ten kilocycles apart,
namely 6,01O, 5000, etc, conserva-
lively assigned, could be made to
carry 100 or more messages each
At a separation of five kilocycles,
as is now practiced on short waves,
about $500 channels would be avail
able, a single one of which would
be sufficient for the needs of an
entire industry through the double
tuning method"
F. M. Anderson, KnightstoWn, says
that he has received on his Erla
five-tube set stations in every State
in the United States excepting Ida
no, Montana, Arizona, Nevada and
South Carolina. He has logged %
California stations: five in Oregon,
nine in Washington, two in Utah
and one each in Wyoming and
Arizona. He has received IA Cana
dians and two Cuban stations.
Anderson and Fishing the Air in
vite better list.
Adherence by the United States
to "The World Court as expressed
in the subject, "In or Out of the
World Court" will be discussed in
the "Voters' Service" broadcast
through the MIC Red network
The subject will be discussed
from various viewpoints by James
G. Mcdonald, chairman of the
executive committee Of the Foreign
Policy Association, and Senator
Frederick H. Gillett of Massachu-
sets, together with third speaker
yet to be announced.
In connection with this discus
sion, the American Library Asso-
citation has recommended that the
radio audience read 1.-THE sAmeri-
can Peace Policy" by Kirby Page,
and two articles in recent maya
zines-"Peace Talk" in The Out
look for Nov. 80, 1927, and "A
Proposal for an American Doc
trine of World Peace" in the Cur
rent History magazine for Decem-
Der, 1927 The American Library
Association, from time to time, is
issuing book lists bearing on the
subjects brought forward in these
weekly broadcaSts.
Tune in stations listed in Dial
Twisters under WEAF, New York.
Jacques Singer, Polish violinist,
will play the famous Nightmare
SOnakao Of Tartini "The DEVILS