The Indianapolis times. [volume] (Indianapolis [Ind.]) 1922-1965, 1929-02-28
Radio -
SURVEY BARES
new TYPES OF
RADIO TROUBLE
Minor Interference Found in
Several Sections of
City.

New sources of radio interference
constantly are being discovered by
The Times investigator. During the
course of his research, major
sources of interference showed up
easily and were, of course, found
very easily. Interference caused by
moving signs operated electrically
have been watched with a suspicious
eye by the interference man for
long time, but as they contribute
only what is called minor interior
ence, his campaign has not been so
relentless until the major cases had
been cleared up.
He began h Investigations on
interference of this character Mon
day and discovered his first one in
an electric sign operated at the
Madden and Copple garage, 1888
Capitol avenue. Most electric signs
operate by making and breaking a
series of electric circuits This is
accomplished by motor driven de-
vice which in turn motivated set
of contacts which in time become
worn and begin to spark, giving rise,
by virtue of their poor contacts and
subsequent sparkling, to radio waves
that impair reception for the radio
fans.
This interference was tested and
found to be of sufficient intensity to
handicap listeners for a distance of
two squares.
The investigation especially of the
downtown district brought to light
another type of interference much
the same as the moving electric
signs. The Quick Tire and Service
Company was the offender in this
case.
The motors driving their tire
buffing machine and their air
pumps were found to sparkling badly
at the brushes, transmitting inter-
ference perceptible for a distance.
In this section there are a num-
Der of large apartment houses and
hotels, where a large number of
the guests and residents own radio
sets.
With variety of intereferences,
that have not been discovered and |
tn e that have been found and not |
cleared, this newly found type of |
interference serves only to aggravate
an already serious condition with |
which radio in this section has had |
to contend for year.
Continuing this all-night survey, |
The Times interference man went to |
another section, Sherman drive and |
New York street, from where the |
radio listeners of this district have |
sent in many letters. After a careful |
recheck of this section, w. A. Jacoby
found the neon sign operating in
front of the Sherman Inn was Gre
ating a noticeable interference,
caused by bad contacts in the switch
box.
The manager of the inn stated |
that he was sorry that this hap
pened, and said that he would have
it repaired at once. If the fans who
live in this section experience a re-
currence of this interference, notify |
The Times radio interference man by |
mail.
During the last six months many |
letters have reached the interior
ence editor complaining about am
ateurS sending code on the broad
cast wave band. In several cases
the editor has found them really |
off wave and notified D. H. Angus
of the A. r. r. l. Of this city. The
station then was given a check to
determine whether it actually was
causing the interference.
The last two nights Jacoby has
been tracing different sections of
the city where the interference
seemed to be of the greatest inten-
siity. After laborious hunt he
found amateur station 9BHC off
wave length and apparently on a
broadcast wave length. This will
be reported to D. H. Angus, the sta
ton will be inspected and made to
return to its assigned wave, and
at the same time be so tuned as
TO emit a wave that will not cover
the dials.
A mass meeting Of the Radio
Listeners League Of Lebanon has
been called for Saturday night at
7:3o at the courthouse by Virgil
Buntin, president of the league. The
meeting is to be held to see what
can be done about clearing the in
reference found by The Times radio
interference man last week.