Brownsville herald. [volume] (Brownsville, Tex.) 1910-current, 1929-09-01
NAVAL RADIO

NOUlLiIutQ TIQIl EdAt ~
and telegraph lines. pole changers
and converters. motors. sign flashes.
Under household appliances come
electric pads or any similar ther-
mostat, controlled devices, violet
ray machines or any high frequency
apparatus. flat irons or any type Of
resistance heaters. door bells, light
switches and motors such as used
on vacuum cleaners, washing ma
chimes. electric fans. etc.
Miscellaneous: x-ray machines.
storage battery charges, ignition
system. elevators. moving picture
equipment, waffle irons. percolators,
vibrating rectifiers, leaky cables.
bad connections in lighting system.
soda mixers, corroded or loose con-
nections in radio set, printing press
es, hair clippers, electric refrigera-
tors, vacuum cleaners. telephone
magnetos, le-ky transformer fuses,
defective light sockets.
And many more too numerous
to mention here end no doubt
Brownsville has pie ny.
THE most important step in elm
mating or reducing interference Is
70 trace it to a definite point or de-
vice. The means for accomplishing
this are not always within the pro-
vince OF the radio set owner and the
course may be pursued as follows:
IF your radio set IS Of The type
which uses an antenna system faer-
ial and ground, the wire connecting
70 the aerial and the wire connect
ing to ground should be removed
$om their respective binding posts
Hnd a small piece Of wire subss%-
tuted. Connect this wire directly
across the aerial and ground posts.
Such procedure then leaves the
radio set effectively without an an
tenna system. which is the collec-
tor OF energy for the set. The re-
suit is that any interference being
picked up outside the radio set It.
self, Is reduced or eliminated when
the collector system IS removed.
IF the case is such that the In
reference Is reduced or eliminated
you may decide Immediately that
It Is from an outside cause and not
due to your radio set.
IF the ease is such that the in
interference continues with equal
volume. a careful analysis Of the
radio set should be made. Any rep
utable radio service organization
will make this examination for q
reasonable fee.
When 1t Is decided that the noise
II due TO outside causes and your
local radio service organization has
carefully checked the source hay
ing found IL due 20 electric light or
transmission wires. you should call
the local power company and ask
for assistance in reducing or elm
mating the interference.
IF your radio Sc. Is OF the loon
type and variation Of the loop posi-
ton changes the strength of inter-
ference, it may be considered as
coming from a source outside the
radio set itself.
Tuning
Improper tuning OF your radio
set may cause many kinds OF in
reference. This kind Of interior
ence bothers you. your nelchbors.
and. In some instances, radio sets
q considerable distance away. Fol-
low. carefully. the instructions &C.
companying the radio set. III none
are included secure the services Of
q competent radio service organ
izaticn and have its operation ex-
planned.
"A properly tuned and operated
radio set is a pleasure.
Due TO the s~electivity and SEN
&.tivtty OF some radio sets and TO
the frequency ALLEGATION Of broad