The Coconino sun., 1926-01-29
Radio Receivers and Loud Speakers
From talk by Arthur NJ Flagstaff Rotary Club
January 19

i / am going to confine myself to
making few remarks and giving a
few suggestions about two parts of a
radio receiver which are seldom given
consideration at all by the purchaser
of q set, and far more seldom given
due consideration in relation to their
Importance.
There are three parts TO every ra-
dio receiver; first the system used
for the collection of energy from the
air; second the set itself; and third,
the loud speaker, or reproducing de-
vice.
am going to pass over the set it.
self with but few remarks, as the set
is usually the thing given the most
consideration. Radio is stabilized to
point today where all manufacturers
/ are putting about equal satisfaction
into the operation Of their sets for a
I dollar, or in other words, two sets,
made by different manufacturers, sell
ing at similar price, are almost as
much alike in operation as two sets
of the same manufactures. One is so
! nearly as good as another that the
purchaser of some particular set can
be practically assured that he has
bought just as good a set for the
money as he would have gotten had
1 he bought another set for the same
price-but no better. After a man
/ has decided how much he is willing
to pay for set, there is little choice
from the standpoint of operation, and
you know as much and probably a
good deal more than | do about what
characteristics you like best from the
standpoint of design of cabinet and
the like.
The collection system is a thing
which is seldom considered by the
buyer of a set Most buyers pick the
set they want and use the collecting
system for which the, set is designed
very frequently to their great disau-
pointment after they have had the
set for little while. There are two
! systems in general use, the aerial and
the loop. If you want the most satis-
/ faction money can buy, use loop set,
but II you want the greatest distance,
Tor the money, use an aerial. How
ever, II you want the greatest dis
tance possible, and are willing to pay
! little extra for 1t, again saw. use
a loop. Al good aerial picks up about
ten times the amount of energy which
the loop picks up, which has naturally
given rise to the misconception that
/ it stands to reason that more can be
! gotten with an aerial than with q
loop. Reasonable as that sounds. II
| Is not true. It is not what the col
lecting system feeds to the set which
operates the loud speaker, but what
comes out Of the set.
1t is obvious that If d signal
strength of one is fed to one SET ana
signal strength of ten to another,
the one receiving the strength of one
being capable of ten times the ampli-
/ fication that the other is capable Of,
the result in the speaker will be the
same.g The fact is that. the amplifica-
/ ton and the sensativeness of a set can
be carried to almost infinite limits,
4 SO it is obvious that the actual
| amount of energy picked up has litale
/ If anything to do with it, for the SET
can be designed to make up for any
lack Of signal strength in the collect.
/ Ing system. The one thing that makes
| the big difference is the noise level
/ The amount Of static in the air on 3
| given night is called the noise level
On about $50 nights out Of 365 there
/ is noise level. Sometimes it is high,
sometimes low, but it is extremely