8
THE SUNDAY OREGOXIAN, PORTLAND, OCTOBER 22. 1922
Preparations Made for Installation of Equipment Which Is Due to Arrive October 30 Apparatus Expected to Be Completed by Election Day Crew of 15 Men Now Busy.
THE QREGONI AN BEGINS WORK ON HIGHPOWER RADIO STATION
BY SAUL EMANUEL.
WORK on The Oregonian'a new
high -power broadcasting
station Is already under way.
Under the direction Qf Al Cochran,
the building superintendent, a crew
of 15 men is busy around the roof
and clock tower of The Oregonian
building-'frora daylight until dark
ness preparing for the arrival of
the Western Electric radio equip
ment. Word haa been received that the
equipment Is now on its way to
Portland by fast freight. Barring
a railroad wreck or other accident
the apparatus should be in Port
land by October 30. On that date
will arrive P. L. Evans, the West
ern Electric engineer, who will su
pervise the Installation of the big
set.
Tomorrow morning will find men
fitting up the "studio" room with
layers of what is known as "ac
coustican felt," a product of the
Johns - Manville company, and
through which, it is claimed, no
sound can pierce. Over this felt
base will be laid heavy fabrics. The
side walls of ttie "studio" will be
covered, in addition, with portiers
and draperies.
Work on the new steel towers
from which the great spreads of
antenna wires will be stretched,
will also beg'.- this week. One will
be raised high ,'nto the air from
the top of The Oregonian clock
tower and the other will stand upon
the roof of the Northwestern Bank
building. T,he tower tops will be
231 feet apart and nearly 300 feet
from the' streets..
A unique feature of these latticed
RADIO QUERIES
Editor Radio Waves and Ripples:
1. I live 25 miles from Portland and
would like to know if it is possible to
hear satisfactorily with a crystal set.
2. Is this tuner large enough, made
of one layer of No. .'4 sinele cotton cov
ered copper wir (118 turn.?) wound on
4'A-inch tube and tapped every ten
turns?
3. My aerial is nbout 130 feet long
and 20 feet hlRh on one end and 25 feet
on the other end. If I use a fixed con
denser, tuner and detector, should I be
able to receive messass from Portland?-
4. How can I find my wave length?
5. What time does The Oregonian
broadcast ?
6. Would a variable condenser help in
the tuning?
7. Would four sheets of tinfoil Be
tween five sheets of mica 2 by 2 inches
make a good filed condenser?
8. Does it reduce the power of re
ceiving if the wires cross each other?
. Would it be better to fiie the
nickel plating off. the switch points?
L. N.. l"nrest Grove.
IV OTHER cor.diMons are satis
factory, yuu ou?ht to be able
to hear the Portland stations.
2. Your tuner is by far too large
for short-wave reception. Would
suggest winding a coil of only 60
turns and using No. 20 copper wire.
Tap every five turns.
3. That will depend on'other con
ditions outside of your apparatus
and aerial. Under favorable condi
tions, crystal sets often pick up sig
nals much further than 2.5 miles.
4. Add the length of the antenna
to the length of the lead-in wire and
multiply by 1.6. This wili give you
the approximate wave length of
your antenna in meters.
5. The Oregonian station will be
closed down for several weeks until
the new 500-watt set is placed in
operation. The new schedule of
programme hours will be announced
later.
6. Yes. The addition of a variable
condenser will sharpen the tuning.
7. Such condenser should prove an
excellent one for bridging around
the telephone receivers.
8. If you mean the antenna wires,
one or more of .them crossing each
other and touching each other will
cut down the strength of your sig
nals. 9. No. If the plating is clean and
not corroded, it is unnecessary to
file the points.
Editor Radio Waves and Ripples
1. Why is it necessary for me to place
the switch lever on two points of my
vario-coupler in order to hear any sta
tions?
2. I am us'ng a variable condenser in
the grid circuit of my receiving set, but
am not getting any good .results. Where
can I put the condenser to get better re
suits? R. T. A.. Portland. Or.
1. This is most likely due to poor
construction of the coupler in that a
fine degree of tuning cannot be ob
tained. When you place the lever
on two taps at once, you probably
obtain an inductance value which is
closer to the wave-length of the re
ceived signals. If you connect a
variable condenser across the coil,
you will be able to get a sharper de
gree of tuning when using only one
tap at a time.
2. A variable condenser in the
grid circuit increases the wave
length of the circuit, throwing it
out of resonance with the aerial cir
cuit. For short waves, the small
fixed condenser'in the grid circuit is
the best, and the variable should be
placed across the phones and "B"
battery.
' -
Editor Radio Waves and Ripples:
What is there I can use for a small and
compact inductance without resorting to
honeycomb or spiderweb coils; one that
I can tune in to 3tlo and 400 meters? 1
prefer a fixed inductance of some kind
to use with two variable condensers.
Hotv can I make such a coil?
N. R., Woodburn
The honeycomb or spiderweb type
coils are the very best compact in
ductances, as their capacity is wide
ly distributed so that it does not
affect their inductance values. You
might construct what is known as a
"pancake" coil, although you will
not get as good results as with the
honeycomb or the spiderweb. To
make such a coil you will have to
make a wooden form with sides or
"end" about one-quarter inch apart.
The coil is wound in an ordinary
way in layera between the ends. For
short-wave work from 360 to 400
meters, you will need only 35 or 40
xurut ror a primary coll and about
10 turns for a secondary coil.
. .
Editor Radio Waves and Ripples:
I live about 60 miles southwest of
Portland. Could I hear The Oregonian
new station with a crtal detector using
a catena crystal ;
A FAN, Sheridan, Or
Thia question was answered
last Sunday's Oregonian. It is quite
possible that you will be able to
hear The Oregonian s 600-watt sta
tion with a crystal detector. Con
certs from several hundred miles
away have been heard with a crys
tal detector when they have been
broadcast from a high-power station
using 600 watts or more of power.
Editor Radio Waves and Ripples:
1. What number of turns are required
in Honeycomb cons using one as apri
mary, the other as a secondary and th
third as a tickler?
2. What size variable condensers are
necessary in this type of receiver?
3. Will such fti receiver give me as
good results as the variometer regen
erative types?
4. Can I build honeycomb coils very
easily or would it be more practical to
buy them? A. It.. Vancouver. Wash.
1. For re-ceivlng radiophone
broadcasts at 360 or 400 meters, the
primary coil should be of 69 turns.
steel towers will be the steam-pipe
system for melting ice during' sleet
storms. Five steel pipes will run
throughout the towers, one in each
corner and the fifth in the cen
ter, running clear to the top. Dur
ing heavy winter weather steam
will be sent through these pipes,
keeping the towers at such tem
perature that no ice will be able
to form upon them.
Four heavy copper stranded wires
150 feet long and stretched between
16-foot bridles will form the an
tenna spread of the new Oregonian
station. These will be led into the
apparatus room just below the clock
tower roof, in the form of a cage.
Both the antenna proper and the
lead-in will be heavily insulated
from the supports and the build
ing. About 100 feet below the antenna
will be stretched another to a6t aa
the counterpoise or "ground" for
the high frequency electric currents
This also will be heavily insulated
from its supports.
An unusuaf piece of workmanship
preliminary to the installation of the
apparatus has just been "completed
This was the 190-foot long copper
pipe of one inch diameter, which
was run !n a straight line from the
topmost floor of the tower through
every Jloor of the building and fi
nally submerged in a base of char
coal 12 feet below the building Base
ment. Eaelj. floor of the main build
ing and the floors and stairs of the
tower is connected electrically to
this copper pipe. This P'pe will be
both the radio and lightning ground
of the new station.
According to Mr. Cochran the new
station ought ,to be ready for opera
tion by November 7, election day.
AND ANSWERS
the secondary of B0 turns, and the
tickler of 75.
2. Variables of 23 plates or .0005
micro-farad capacity will serve in
both the primary and secondary cir-
cuits.
3. Yes, if correct adjustments are
made in all the circuits.
4. Honeycomb coils are not very
easily built by the average radio
fan. It would be more practical to
buy them, as they are really inex
pensive. -
Radio Pockets Puzzle to
Wireless Experts.
Some Portions of Ocean Included
- In Dead Arena.
RADIO shadows, or "pockets," as
they are more commonly called,
have long proved a profound mys
tery to scientists. TJiese shadows
are practically dead spots in the.
atmosphere through which the electro-magnetic
waves are unable to
penetrate. Parts of the eastern
coast of the United States, a spot in
southern California and certain Bec
kons of Oregon are included among
these shadows.
These pockets are not confined to
land only. They are also known to
be in certain localities on the
oceans, many miles from the near
est land. Radio operators of ocean
going vessels have often reported
that at such and such longitude and
latitude all the signals being re
ceived by him faded out entirely,
and for perhaps three or four hours
all was silent as the grave save for
an occasional splash of static.
In some of these "pockets" sig-
nals can be heard from one or two
directions only, while even close-by
stations cannot pierce through the
invisible walls in the other direc
tions. In other "pockets" signals
can only be heard during certain
seasons of the year. In the vicinity
of Astoria and Seaside the Portland
stations can only be heard during
the summer, which is usually the
worst time of the year for any
wireless work.
Theories have been presented to
explain this mysterious phenomena,
but up to the present time little is
J known as to the cause. In some
localities it is believed to be due to
the presence of large deposits of
metallic ore, which divert the
waves and extinguish them.
There is only one method of over
coming these dead spots today, and
that is to use enormous power in
transmitting ' the signals. With
strong impulses to start with, there
is a possibility that the invisible
walls around the dead spots may be
DroKen down to some extent.
Stations in Oregon which have
been pocketed . and therefore been
unable to hear the Portland broad
casting stations may be able to
hear The Oregonion's new 600-watt
station when it is completed in a
few weeks hence.
It was also suerereRterl in ihnsn
living in a "pocket" that they
stretch their antenna eo that it's
lead-in end will point toward the
transmitting station they desire to
receive. This will often overcome
some of the difficulty.
Two Portland ers Invent
Ever-Set Detector.
Device Said to Eliminate Xecea
ity of Finding the "Sensitive
Spot."
A LITTLE device that its inventor
says will add great impetus to
radio telephony has just been pro
duced by two Portlanders, Bert L.
Dolloff and Seid G. Back, native
born citizens of Chinese ancestry.
The invention is called the "ever
set detector." Its chief advantages
are the elimination of the necessity
of finding a "sensitive spot" and of
adjusting a "cat whisker." The
new detector is not any larger than
the ordinary penny match box and
consists of very simple parts. Its
inventors declare there is nothing
about it that can get out of order
no matter how rough treatment
may be given it.
Patents have been applied for and
until these are granted the inven
tors are withholding any informa
tion that might betray their secret.
They eay, however, that the govern
ing principle of the detector is the
manner in which it is connected up
witn a carborundum equipment.
This material is not being used
successfully in the prdinary small
detector.
A factory for the production of
ever-set detectors on a large scale
is in contemplation, say. the inven
tors. At, present they are turning
out a limited quantity at their
laboratory, 308 First etreet. The
claim is made that the ever-set de
tector rectifies eignals better than
any "crystal" detector on the
market.
The flrt radio broadcasting sta
tion In Alaska was recently licensed
by the department of commerce. It
is operate by the Northern Com
merclal company and is located at
Fairbanks. The new station will
broadcast a programme of enter
tainment for the benefit of citizens
within a radius of about 600 miles.
The call letters are WLAT.
RADIO ENGINEERS DEVELOP VACUUM .'
TUBES OF 100-KILOWATT CAPACITY
With? Such Giants, It Is Believed That Long-distance Wireless Telephony Will Soon Be an Assured Fact.
Carrying of Voices Across Oceans Is Anticipated.
wr?s,: 7v Sf - Jill 4
IkjMiiinA -
The giant vacuum tube of 100-ktlowatt capacity which was recently developed In 'the Western Electric labora
tories and which Is expected to revolutionize radio telephony.
A'
FTEE several years of experi
menting the radio engineers
of the Western Electric lab
oratories have developed vacuum
tubes of 100-kilowatt capacity. With
such giant tubes it is believed that
long-distance radio telephony will
soon be an assured, fact.
According to the engineers who
developed the tubes, two of them
connected in parallel will undoubt-
efliv parrv the voire umti th
NEED OF IMPROVING RADIO
APPARATUS IS EMPHASIZED
Lack of Public Interest Is' Blamed to Dealers Foisting Too Much
Poor-quality Goods on Buyers.
THE necessity of improvements
in radio apparatus is strongly
emphasized by H. Gernsback.
editor of the Radio News, in an
editorial appearing in the October
Issue of his magazine. "
Too much poor apparatus foisted
upon an unsuspecting public was
the cause of the tremendous falling
off of interest in radio during the
summer months, according to Mr.
Gernsback.
"To revive the interest, the radio
industry must clean house, and
make aN clean sweep," he declares.
'Every instrument, every piece of
apparatus that leaves the factory
without giving 100 per cent satis
faction to the user will prove -a
boomerang six months hence, when
the public will refuse to buy. There
has been too much poor equipment
and flooding of the -market with
junk, and we cannot be too strong
in our denunciation of such malprac
tice as was, and still is, rampant.
"Another thing that has destroyed
sales and taken away the confidence
of the public is the loud - talker.
Unless this instrument is carefully
constructed, not only by radio ex
perts, but acoustic experts as well,
such an instrument will drive more
prospects away than is imagined In
some quarters. We have actually
seen people standing in front of
stores and after listening to some
of these atrocities they turned away
in disgust, saying, 'If that is radio,
I want none of it.'
. "The fault 4wthis case is not al
ways in the loud-speaking device,
but in the ignorance of the dealer
or the man" who displays the in
strument, and who does not know
how to get results from it. When
amplification reaches beyond a cer
tain stage, particularly where the
regenerative effects are used, it be
comes exceedingly difficult to avoid
distortion. Even the best loud
talkers distort pretty badly, unless
operated or used by an expert who
knows radio from the ground up.
But when the average person buys
one of these instruments he very
seldom gets results that are worth
while and that will make for future
Bales. When a novice in radio op
erates one of these horns or loud
talkers, there is not one chance in
ten that he will get the proper re
suits, and then, when his friends
come to listen to the news, music
or lectures, they may marvel at It,
but as a rule they are not favorably
impressed, and they do not often
wish to invest their money in a
similar outfit.
"These conditions have killed lit
erally a hundred thousand sales all
over the country, and it is up to
our manufacturers to rectify these
conditions. With the exception of
two or three loud-talkers, there is
none that gives real results.
"The mischief becomes even great
er when horns alone are sold, made
for the purpose of attaching a head
set or single receiver to them. The
reason , is that no two makes of re
ceivers will work the same with
such horns. The size of the dia
phragm and the strength of the
magnets, besides a hundred other
factors, contribute toward distor
tion, and it is impossible for a
manufacturer of a horn attachment
to know in advance what phone will
oceans. Tests made by the engi-.
neers indicate that even larger tubes
with greater power can be made if
necessary. , ..
A 'feature of the new type of tube
is that the "plate" forms the outer
wall. - Made of copper, the plate is
a cylinder which is sealed to the
glass in such a way that it will
not crack under ordinary working
conditions.
The high temperatures caused
when enormous voltages are applied
be used with his product. There
fore, the chances are overwhelm
ingly against obtaining results from
such a horn.
"A horn that will work moder
ately well with a phone having a-2-inch
piaphragm, will not always
work with a phone that has a lVt-
mcn aiapnragm. etc. The moral.
therefore, is that manufacturers of
horns should not put them out alone
In any case whatsoever, but fur
nish the phones or other electro
magnetic appliance built into the
socket of the horn itself. This would
be the only way to get fair results.
Ana while we are on the subiect
of horns, we want to call to the
manufacturers' attention that 90
per cent of them are not only de
signed wrong from start to finish,
mechanically, but most of them have
no acoustic properties whatsoever.
The size and shape, acoustically,
are wrong, and the materials them
selves are ill-chosen. Tou cannot
expect a thin, tin horn to give any-
imng out a tinny sound, which, in
fact, it does. We have seen horns
when used with phones that started
to vibrate at their fundamental
stage, giving off a note of their own,
ana you can imagine the noise that
issued forth from such a horn, in
stead of music. The materials are
usually entirely too thin, and if
metal is used It. should never be
less than 1-32 inch in thickness.".
The patent.office is feeling results
of the widespread interest in radio.
According to an article in the Dear
born independent, more than 1000
patents have been granted, with
Increase the Efficiency
of your set by repairing your antenna.
Stranded wire 90c per 100 feet.
ALL MAKES OF INSULATORS,
LIGHTNING PROTECTORS, ETC.
The
INC
-S0B5
(The Oldest Exclusive Radio Store In Portland)
Mail Order Service Write for Catalog.
310 Oak Street (Installer KCrW) Portland, Oregon
OEXOI
O
ibnoi
YOU ARE
The wonderfully improved radio concerts and other broadcasted
programs. The local stations are all installing larger and better
broadcasting equipment, and getting away from phonograph'tnusis
to programs furnished by talented local and visiting artists.
2 DO TOr KSOW THAT WE WllX SEIA YOV A tOTD-SPEAKI'VG
n RADIO SET ON MONTHLY PAYMENT TERMS f
n ' Write or phone for our new catalogue.
Radio Service Bureau
Gaaco Building
KYG
WE ARE NOW
OPERATING
DEZOI
I0E30I
to the plate are taken care of by
placing the tube in a tank of water
which circulates through a radiator
One of these tubes stands 3 feet
high and is 3 inches in diameter
at the bottom. 'To heat the filament
6000 watts .of, electrical power is
used.
' The use of these tubes will make
unnecessary the large and costly ap
paratus of the present-day ; high
power, radio stations. Only two or
three of these tubes will operate the
largest station in service today.
.
many others applied for'. Five men
have received patents for basic
conceptions and improvements: Mar
coni, J. A. Fhsmlng, who contributed
to the vacuum tube; Lee DeForest,
the audion inventor; Edwin Arm
strong and Edwin H. Colpitts, whose
repeater was patented in 1915.
Secretary of Labor Davis started
broadcasting on October 2 for the
department of labor through the
naval air station at Anacostla,
N. O. F. The service ' will be for
three 15-minute periods each week,
from 7:15 to 7:30 every Monday,
Tuesday and Thursday. The secre
tary in his first broadcast presented
a short exposition of what the de
partment of labor can do and is
doing for American wage-earners,
A definite programme will be an
nounced later.
Plates Not Only Factor in
Condenser's Capacity.
Erroneous Idea Declared Held
by Many Radio Fans.
MANT people have become so ac
customed to buying apparatus
of a certain make or specification
that when they want a condenser of
.001 microfarad capacity, they at
once' think of one that has 43 plates.
Or if they want one of .0005 micro
farads, the 23-plate type comes to
their miiia.
This is an erroneous idea, for there
are several other factors besides the
number of plates that determine' the
capacity of a condenser.
The essentials of a condenser are
two metal plates separated by an in
sulating medium or dielectric, which
in this case Is air. Now the capacity
of such a tondenser depends on
three factors the area of the di
electric, the nature of the dielectric
and the thickness of the dielectric.
Store
J. B. WEED, Mgr.
MISSING
Main 4.VSH
THE FAMOUS
HAWLM STATION
IOBOZ
IOXaOE
Dielectrics have what la known aa,
an inductivity value or oieiectrici
constant, and this value is calculated
by the relationship of the capacity
values of the different dielectrics to
that of air at ordinary pressure,
which is considered as having a
value of 1. On this - basis a di
electric of paraffined paper would
make a condenser having a capac
ity 3.5 times that of air; mica would
make a capacity from 4 to 8 times
that of air; hard rubber about 2.5
times, etc. Tou can now readily
see how such very small condensers
can be made having a comparative
ly high capacity by using a mica
dielectric.
I (jonaensers lor tuning purposes
frith receiving sets almost invari
ably have a dielectric of air, as this
substance incurs the least losses, so
that factor we need not further con
sider. But there are two other
factors that are of equal import
ance the area of the dielectric and
spacing of the plates. The greater
the expanse of the diilectrlc between
the plates, the greater the capacity,
and also the closer the plates are
together, the greater the capacity.
Mechanical considerations must be
met with when spacing the plates
so that a Certain distance must be
allowed for the sake of mechanical
stability to prevent the plates from
touching. , .
When buying condensers keep
these thoughts in mind and choose
by the capacity rating Instead of
by the number of plates. Some vari
able condensers of .0005 mfd. capac
ity have 23 plates, while others of
the same capacity have but 15, and
the condensers with the lesser num
ber of plates will serve every pur
pose as well as the one with the
greater, constructional details be
ing equal.
Nearly All Tubes Require
Filament Voltage Under 6.
Wentinghonse Aerlola Seta Need
But 1.S Voltn en Filament.
W1
HAT is the capacity of a grid
condenser? How many ohms
resistance should the receivers be
for best results? Will ight volts
be all right for the tube filament?
Such questions constitute a large
part of those sent in by anxious ex
perimenters. ' Practically ail of the receiving
tubes now on the market require a
filament voltage of not more than
six. The tubes made for use with
Westinghouse Aeriola sets require
but 1.5 volts on the filament. The
majority of the standard tubes re
quire a plate voltage of 22- Some
of the other tubes may require a
critical voltage adjustment that
may rise up to 60. The plate voltage
of amplifier tubes should be be
tween 45 and 60.
Rheostats for use with receiving
tubes should .have a resistance of
about six ohms and should be so
made that they will . withstand a
continuous current of at least one
ampere without heating.
Receivers or phones are usually
rated according to their resistance,
but this rating should not be taken
as an absolute indication of quality
or sensitiveness. The constructional
details of the phones must also be
taken into consideration. A well
constructed and properly designed
phone for radio use will generally
be most sensitive if wound with
enough wire to indicate a resistance
of from 20O0 to 3000 ohms.
A condenser to be shunted across
the phones to afford a by-pass for
radio frequency currents should .
nave a cap
microfarad;
have a capacity of from .002 to .003
or simply mfd. The
grid condenser should be about .005
mfd., while the grid leak should
have a resistance of about one
megohm. These last two figures
will vary with different tubes.
Variable condensers for general
tuning purposes can well have a
capacity of .001 mfd. If a lower
range is desired you can use a .005
mfd. condenser, and If . a greater
range is needed you can use one of
.0015 mfd.
Ordinary dry cells give a voltage
of m, so if you wish to use such
cells to light your tube filament you
will have to connect four of them
in 'series.
Storage battery cells normally
give a voltage of two. Three such
cells in series are necessary to give
six volts. '
Until the advent of thei mod
ern regenerative receiver, the term
"shielding," as applied to radio ap
paratus, was quite unknown. The
regenerative receiver, however, be
ing super-sensitive to 11 electrical
influences, has been found to re
quire protection against external
electrical disturbances. Shielding
accomplishes this. It is the process
of surrounding the entire receiver
and sometimes even the individual
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449 WahlnTton St- Near 13th
Broadway 0145
.RADIO CONCERT
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204 Alder St. Main SOIL
NEW, SIMPLE REGENERATIVE
RECEIVER EASILY HANDLED
Two Variometers and One Variable Condenser Properly Installed
Produce Satisfactory Results in Amplification of Signals.
'Vi I I
Tbls vlmplified reirenerativ receiver in eatty to control, as bat two
variometer and one variable condenser are used to adjust the circuits.
A SIMPLIFIED regenerative re
ceiver can be ' easily made
with two variometers. One of
the variometers is used as a tuning
Inductance for both the primary and
the grid circuit, while -the other is
placed in the plate circuit.
; The advantage of this type of re
ceiver is in the simplified control.
Only three controls are used the
condenser and the two variometers.
Even though the possibility for
critical adjustment of primary and
secondary circuits and the coupling
of these two circuits is eliminated,
this set will be found to be quite se
circuits therein, by a metallic sur
face. This usually takes the form
of a copper lining in the receiver
cabinet and on the rear of the panel
itself. This shielding absorbs any
electrical influence which would
normally find its way to the wind
ings of the receiver and induce in
them an electric current, in the same
manner that radio waves induce
electric currents in a receiving an
tenna. Radio Notes.
UNCLE SAM'S "sell it by air" plan,
the first practical application
of broadcasting to business, is de
veloping rapidly, department of
commerce officials announced today.
Following the , broadcasting from
Boston of the department's trade
opportunities throughout New Eng
land, many chambers of commerce
in the country have asked for simi
lar service for their broadcasting
stations. Several of the high-powered
radio stations have offered their
services to the bureau of foreign
and domestic commerce for this new
and unique method of making public
trade opportunities in foreign lands.
The Ridgewood (L,. I.) Times
broadcasting station is anxious to
serve the territory around New
York. Another station, W F O at
Dayton, O., desires to receive in
formation on the world's markets
that it may be broadcasted to the
exporters in the Miami valley. A sta
tion at St. Louis has already begun
to broadcast foreign trade notes to
10,000,000 fans, and the chamber of
commerce at Buffalo wants the
data for use in two of its local
stations'. v
It is understood that the bureau
of foreign and domestic commerce at
Washington is considering sending
wekly data to other localities, where
it will be distributed by radio to in
terested manufacturers and ex
porters. Marvelous are the powers of the
radio compass, almost limitless its
pathfinding sense over pathless seas.
Many technical descriptions of It
have been broadcasted by the press
of the-world, but littl has been told
of its erie sense, its weird opera
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lective and to produce satisfactory
results in the amplification of sig
nals. The use of a variable condenser in
series with the. aerial circuit will
permit independent tuning of the
aerial circuit apart from the sec
ondary circuit.
A hook-up of the simplified re
generative receiver accompanies thia
article. The variometers are the
standard short wave type, while the
variable condenser is of .001 micro
farad capacity. If another variable
condenser of .0005. mfd. capacity is
placed around the primary vario
meter, a still greater sharpness of
tuning will be had.
tions, its uncanny transmission of
spemingly occult knowledge that
nothing else can accomplish.
Very recently Commander David
C. Patterson of the navy communi
cation service elucidated over the
radio some of the marvels of this
most recent invention and develop
ment of radio. This compass was
developed by the United States navy
and has taken an advanced place
in marine navigation and the art of
warfare. When two or more enemy
fleets seek each other for battle the
radio compass will point the direo
tion of the one to the commander
of the other fleet. The fleet com
mander, gay of an American fleet,
desires to learn the location, course
and speed of an enemy squadron. He
swings his radio compass about un
til it comes to a Vause at the direc
tion of the enemy. He is then able
to figure out the direction by the
simplest of processes and the speed
's determined by a set of fixed rules
that are as certain as death and
taxes.
"Hello, all ships and stations! This
is the radiophone broadcasting sta
tion of the Oriental Radio company
at Tokio, transmitting. Today's ra
dio programme inaugurates our reg-
With this announcement the first
radio telephone broadcasting station
in Japan was opened September 6.
The company has been granted per
mission by the Japanese government
to carry on this work in the same
way as the radio stations in this
country, and a regular programme
vill be sent out daily.
As soon as Tokio passes the first
stages in its radio education the
company will extend its activities
to other parts of Japan. Osaka being
the next city where a station will
be established. The plan is to have
13 sending stations in the largest
cities of the empire in operation by
about January 1, 1923.
For a home-made storage battery,
mix a solution of 2 per cen sul
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Do not make the mlBtake of pouring
the water into the acid. That would
be disastrous. Pour the acid into
the water. Water, when poured
I into sulphuric acid, develops a high
temperature.
Fills the popular demand
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Antenna & Batteries $6.20
Operating
KQY
Portland, Ore.
Portland, Oregon
Station KGG '
Station 7X1