Evening star., 1923-02-18
BY COMMANDER STANFORD
HOOPER, l.. S. n.
y Copyright, 1879

Avoidable interference among radio
stations themselves must cease.
This the radio fan insistently de-
anands, and the radio fan is rapidly
constituting the bulk of our poputa-
tion--he and she comprise public
opinion in popular radio.
Only the large governmental and
commercial radio operating concerns
can fully appreciate what vigorous
public opinion now exists through
out the length and breadth of the
land with respect to radio interfer-
encc, especially as II affects broad
casting. To the radio fan 1t is suf1i-
Gent that natures own radio nui-
which it is recognized we all are
more or less impotent, should hold
sway in the realm of radiophone
broadcasting during the spring and
summer months.
1t Is indefensiSle and unbearable to
the radio fan that its effects should
during the popular radio season of
autumn and winter by man-made in
reference in the ether. This attitude
ca the part of the general public is
hsth logical and reasonable. because
That which man is capable of Great
trg should likewise be susceptible of
belnS suppressed.
The conditions prescribed must
therefore be attained by all radio
operating agencies, whether govern
of the difficulties involved. Eirtu-
ally all radio transmitting stations
give off more than one individual
wave when their transmitters func-
ton into their antenna systems They
not only create in the ether their
regular working wave, but also from
one to fifteen or more additional
waves of shorter length.
M transmitting stations are Of
lenders in this respect In the present
stage of development of the radio
art. including the h:gh-power trans
ocean stations, the low-power coastal
stations. the radiophone broadca st
stations and the amateur station.
The high power stations are, rela-
lively speaking, the greatest offend
erS of all, because OF the greater num-
bcr OF individual superfluous waves
given off, some Of which are Of fire.
auencies equivalent to the broadcast
waves, and the comparatively great
distances from the Transmitting sta
tions these superhuous waves are ef-
fectiVe.
Suppression Is Problem.
The problem is 70 suppress these
superfiuous waves at the transmitting
stations themselves so that they will
not cause interference in the ether.
The ideal conditions in this respect
have long been recognized. and con-
siderable progress as regards their
suppression had been made prior TO
the advent of the broadcast service.
Interference by radio transmitting
stations themselves as we'll as static
have constituted the two principal
problems IN radio which the Navy
radio and other responsible radio
operating agencies have been endea-
voring TO solve for more than twenty
years.
Both features have constituted al
most unhearable nuisances in radio
toleEraphy during all this time. but
ices have been Obliged to carry on"
regardless OF them Interference or
no interference, favorable atmos-
phertc conditions or unfavorable con-
ditionsS. these essential services
could not in the past and cannot now
suspend operations: they simply have
had to. and must now. carry on day
and night throughout every day in
the year.
Obviously, therefore. if avoidable
Interference could have readily been
eliminated or its effect neutralized
suitable action toward this desirable
end would have been taken long ago.
To accomplish this result. however,
'''lbi'u luNeSlsdllOn dIu
experimentation and. what is most
important of ali. the expenditure Of
large sums of money by the various
sgencies concerned. Moreover. since
the advent of radio. some twenty
Years ago, the demand has always
been for more widely extended serv-
ice. and, regardless OF the marvellous
extensions and applications Of radio
in various lines, this condition still
exists.
The application OF radio in practi-
cal services simply went forward by