. BTTW 9 MA M"X TB "
THE OREGON STATESMAN. SALEM, OREGON
SUNDAY MORNING, AUGUST SO, 1S25
Bra
ICE IS BIG
FEATURE UIO
- I -
I ..
" -V ..... r... ... - K.,
Proper Working of Set De
pends on Good Connec-
tions in Circuit
Pjr HARRY J. MARX
Resistance are an inseparable
ractor in all electrical circuits, it
may not be there In the form of
a rheostat, potentiometer or other
piece of resistance aparatus, bat tance
tuning and therefore Improves
selecttTlty. Bat In radio frequency
circuits it multiplies the tendency
ot tubes to so into oscillation, pro
ducing the assortment of. squeals,
howls, and whistles which not
only come out of the loud speaker
but back rip and so out in the air
to play havoc with the neighbors
reception.
The old and incorrect .practise
was to add a potentiometer in the
secondary circuit of the radio
frequency stages. This was equira
lent to replacing the resistance
back info the apparatus. It reduc
ed the oscillation tendency but it
likewise killed the selectivity that
was desired and in addition mate
rially reduced the volume. Resis-
shonld not be added where
--if!
Sg5f ,3?T c .
t- as ' ted 05T4T
-,01 . .,
plate or primary coils vf the radio
freauencr transformers and the
B battery to prevent oscillation
by reducing the plate voltage on
the radio frequency tubes. Now
by connecting a MFD conden
ser the B terminal of the primary
on the radio frequency transmor
mers and the filament terminal ot
the tubes, this artificial resistance
can be shnnted out of the tuned
circuit. This condenser closes the
plate circuit to the filament of
the tube for the radio frequency
currents. In other words, on ac
count of the condenser these cur
rents don't have to pass through
the resistance Whence the resist
ance does tot effect the
and selectivity. -
This variable resistance prov
ides a means of reducing the plate
voltage and therefore controls
oscillation. This means of control-
Ins oscillation was f;rst utilized
LOuG TRIPS U
Tivrri in
II
im nor
uujnnHicHor.
every Vart .of the circuit whether
it is Just copper wire connections,
condensers, coils or any other unit
has some resistance value. It may
be great' or small as the case' may
be, but j it exists and is a factor
In the Circuit. .Copper wire is a
good conducter meaning its resls
!ance iaj low, while a non-conductor
simply means something that
has a very high resistance.
Present day radio apparatus is
so designed as to reduce as far as
practicat all resistance In the tun
ed circuits. 4
Oscillation
This ! elimination of surplus
Superior Riding Comfort and
tase of Driving Makes
Tour Easy
Today the average motorist
thinks no more ot driving his car
30 to 200 miles for even a week
end trip than he did a decade ago
tuning '.if driving 24 miles. A trip through
four or five states or even halt
aci'oss the continent in a motor
car Hi considered an ordinary
event for a two or three weeks'
summer vacation. ..
This has been brought about by
commercially by E. F. Andrews in i the remarkable durability or cars
ibe lKresnadync receiver. The today, together with sraootber
ue of this control for radio re-irldlns qualities which have been
iving seta is covered by patent enhanced by full balloon tires, and
it becomes an integral part of the
radio frequency circuits.
:The fundamental cause of oscil
lation! Is due to a great extent to
the amount of voltage across the
plate Ic'rcuit.' If this voltage
controlled so that it can be ad
justed to a value just below the
noint 'where oscillatio nstarts then
radio! frequency amplification can
bs used to full advantage. But
this control 'must not .be such as
to add resistance in the tuned cir
cuits, j - -
J'lnte Voltage Control
Oscillation ' can be effectively
prevented if a variable resistance
resistance vermita much sharper j is connected in series between the
:nfHcations but its use by the fan
iu building his sets or for reme-
yln-x; trouble in a set he has made
s encouraged.
Mr Andrews has now developed
be ue of th's by-passed plate cir-
'ult resistance as a volume con
trol, as well as an oscillation con
trol, j This is done by using an
extremely high variable resistance
having a maximum value of sev
eral megohms. The circuit Is Just,
the sa me as for the control of
oscillation. The first part of the
resistance can be used for oscilla
tion control, and the high resist
ance part for controlling volume.
Volume can thus be adjusted with
out the slightest distortion, and
with j great saving In B battery
current.
This combination control- Is
known as the "Anostat," derived
from '"anode" meaning positive or
plate and the word rheostat. Fur
ther details about the Airostat and
new j developments will be told
about shortly.
the four wheel brake which
made such trips, even at high
speed, comparatively safe
Yet one undesirable feature -of
motor car performance remained
in taking such long trips engine
vibration. At the high speeds ne
cessary on long runs, ranging
from 25 to 45 miles an hour, the
vibration of the average motor is
particularly noticeable.
eliminates all torsional engine
vibration.
This exclusive feature of the
new Oakland six has been ecclalm
ed by experts aa the greatest me
chanical achievement of automo
tive engineering that has been In
troduced this year, comparable to
the introduction ot the two other
great developments In motor Car
constructn. the four wheel brak
es and the balloon tires.
Though the new Oakland six
was Introduced only slightly more
than a month ago, thousands of
letters have been received by Oak
land dealers throughout the coun
try from vwners who attest to
their Joy of touring in this prac
tically motor-vibratlonless car.
The harmonic, balancer Is sim
ple in both principle and design;
is non-wearing and requires no
adjustment. It consists of a light
steel bar. pivoted to the shaft at
Its center and tensroned by stiff
springs at both ends. The weight
of the bar and the stiffness ot the
springs are so selected that the
harmonic balancer has a natural
frequency of vibration practically
the same as the crankshaft itself.
When there is the slightest move
ment of the shaft, the harmonic
balancer picks it up and vibrates
in the opposite direction, thus neu
tralizing all torsional vibration
The principle of its operation
might be stated simply by saying
that the simplest way to stop any
It was to eliminate this objec-1 object ttaatis moving is to push
tionable feature that engineers of It in the opposite direction with a
the Oakland Motor Car company force equal to the force of the
and the General Motors Research moving object. That, in essence.
corporation developed the har- is what the harmonic balancer
monic balancer which positively does.
CHEVROLET TO USE
nnnnrniTiirp ni m
lUMilUtfUll
i
Dealers and Factory to Work
Together in Advertising
Campaigns
1 The Chevrolet Motor company
has announced a co-operative ad
vertising campaign in connection
with Us large dealer organization.
' This campaign Is a further move
by the Chevrolet Motor company
in Its effort to obtain the most
economical distribution ot its
product. It is probably the most
comprehensive and efficient of the
great advertising campaigns in
the automotive Industry. Approx
imately 4.000 newspapers are be
ing used.
Under this plan the Chevrolet
Motor company in reality has be
come the advertising department
of each of its dealers whom it pro
vides with a highly efficient and
consistent advertising campaign
In addition. It become possible
to key local advertising with na
tional advertising and thus broad
cast a single advertising message
at one time In both national and
local publications.
The cooperative feature of the
plan does not apply In a financial
way to the national advertising
nsed by the Chevrolet Motor com
pany In the principal magazines of
the. country. This advertialn; Is
paid for the 'general advertising
appropriation of the company
without expense to the dealers.
The dealer continue to receive
gratis the tales literature and the
effective window display service
of the company. These display
supplement the unified advertis
ing plan. .
In brief the plan Is this:
The Chevrolet Motor company
charges a small amount for each
car shipped to dealers and credits
It to the Chevrolet Dealers' Adver
tising fund. ' To this fund the
company then adds a substantial
contribution from its own adver
tising budget.
The company plans the dealer
advertising campaigns, buys news
paper space, purchases and pre
pares art work, sends the adver
tisements to the newspapers, di
rects the printing and display ot
outdoor advertising handles in
voices and pays bills. The deal
ers thus are relieved of a vast
amount of detail.
A desirable angle of the plan is
a guarantee to each dealer that
very dollar which he pays into the
fund will be spent in his district
for newspaper or outdoor dlsfplay
space, all of the cots ot prepar
ing and placing the advertising
matter being more than covered
by the Chevrolet Motor company's
contribution to the fund.
WALES LIKES HEW' HUP
- - -
IIEIR TO BRITISH TIIIIOXE AD
3IHIES STRAIGHT EIGHT
The Prince of Wales, who has
beea termed the world's foremost
salesman, sold himself on the ad
vantages of the Hupmobile eight
during h'S stay in Potchet Strooa.
South Africa. The royal visitor
sad visiting press correspondents
gathered about the car and Hi
Roysl Highness plied the chaffeur
with question regarding it motor
and other phases ot It construe
tlon. In so doing, the prince dis
played an Intimate knowledge of
automobile engineering and of the
latest and best engineering prac
tices. Having asked that the hood be
lifted the prince had the local
Hupp dealer explain the engine to
him thoroughly. He especially
commented upon mhot he called
the amazing . quietness ot the
motor and the ease and surprising
power It displayed in action.
The royal examination of the
Hupmobile eight took place after
a parade in which His Royal High
ness had ridden In the Hupmobile
eight through the street ot Tot
chef Stroon.
This parade was very largely a
Hupmobile procession tor follow
ing the Hupmobile eight sedan
came aix new Hupmobile fours.
The Hupmobile eight mad a fit
ting leader tor thi procession. It
carried the royal standard and
bore the Prince f Wale' plumes
! in real ostrich feather on the
FACTORY MAX HERK
R. W. Bush, factory represen
tative of the Chevrolet company.
was in Salem. Friday, conferring;
with the Newton company, Chev-j front, with dainty streamers flow
rolet distributors for this city. I ing from wlndshlelfd to radiator.
CorvalUs Bids opened for a
$300,000 woman's gymnasium for
OAC.
Own a QiiMiuy
Automobile
v i m mm M.m. t l.
7 M Lgfc g I Ccrtitcataufrd
IE M I hr themiisiit
M -Ml'- ' CherraUc
. ;
. - I - ".;!'. -;v
0P
no
DEE JdROTH
MOTOR. VEHI
BR
5
4
U
tt
i.
i
Now vou can own a aualitv auto
mobile-ahd weVwill make it so easy
J for .you to buy it that you will never
miss the money Here s how you
can:
it:
S'"
i
t
i
i
i
t
1 Come in and select the model of
car that you like best. j
2 Bring us the coupon below and
$4-00 and we will credit you with
$5.00 on a Chevrolet 6 Purchase
Certificate you earn 6 on all
the payments you make on this
Certificate. )
' j ' : j -....w -,
3 You make regular weekly pay
ments of as little as $5.00 if you wish.
4 ln a short time these payments,
plus the interest that you have
earned, will equal the amount neces
sary for the actual delivery of the
car. After you get the car you pay
the balance in regular monthly
payments, i j
b-iln addition if you already own
a car, we will credit you with b
mi 11 service, repairs and accessories
wnich you purchase from us.
, ' 'I
Touring ............. J . 15660
Roadster 655
Coupe 845
We deposit your money in a separate
trust account at a bankand to
assure absolute protection for your
funds, both the bank and we, our
selves, are insured by a strong, well
known insurance company. Y6u
can make no finer, safer investment.
You will.be surprised to find how
easy it is to buy a Chevrolet thi
way. Thousands of happy owners
are now driving Chevrolet cars pur
chased on the Certificate plan. To
day is a good time for you to call on
us. You will have time to look over
the cars carefully and get fully in
formed on the remarkable value
that they offer. :
Without question Chevrolet is the
finest kw-cost quality car in the
world and represents an automobile
value that is unsurpassed.
See us today. i
Coach $865
Sedan 945
Commercial chassis.. 520
Lower prices, announced on August
17th, represent the most impressive
values Dodge Brothers, IncJ, have
ever offered to the public. j
i ' - j
: if
Wider markets, mounting sales and
steadily expanding output have
made possible these reductions. !
. i
i i
They come at a time when Dodge
Brothers product has achieved a
new and impressive standard of
excellence in four basic particu-j
lars in beauty, in riding ease, in
smoothness of operation, in depend-!
ability. !
! ' . i I
i
Consult us today on these new
prices and the extraordinary
value they represent
Bonesteele Motor Co.
474 South Commercial St. I Phone 423
i 1
1
Express truck chassis....: .'.$650
Mewtoi ChewoletGo
'"-"- N :;--L r '-' ... ' :
CORNER CHEMEKETA AND HIGH
0