6
THE SUNDAY OREGONIAN, PORTLAND, JUNE 25, 1923
lII fif F
OW FAR can I expect to
hear with my receiving
set?" is the favorite ques
tion asked by radio fans and it is
about the most difficult one to an
swer. As there are no set laws gov
erning reception distances, it is
practically impossible to estimate
correctly the range of any particu-.
lar type of apparatus.
In general there may be said to
be five or six different types of re
ceiving sets in use today for the
reception of radio telegraph and
telephone traffic. These are as fol
lows: (1) Receiving apparatus employ
ing the ordinary crystal detector
with single inductance and low sin-Sle-wire
antenna. This type of re
ceiver, provided the detector is ad
justed properly, is capable of pick
ing up radiophone concerts from a
distance of ten miles, and spark sig
nals from distances ranging from
ten to 100 miles daylight range, de
pending on the size of the trans
mitter. Amateur sparks may be
heard as far as 20 miles with this
simple receiver, while commercial
stations may come in from about
100 miles.
(2) Crystal detector receiver of
loose-couple or double inductance
type used in conjunction with fixed
condenser, galena detector, high re
sistance phones (2000 or 3 0 00 ohms)
and an antenna composed of four
wires at least 50 feet high and 100
teet Jong. With this receiver some
very good results can be obtained.
Kadiophone concerts can be heard
30 miles, and spark stations as far
RADIO QUERIES
Editor Radio Waves and Ripples: In
connecting the wires of the aerial to
the sticks across that holds the wires
part ao you just wind the wire Rround
ui should you have knobs for that. -v
li. T.B., Caldwell, Idah.i.
THE best method Is to insert a
knob between each wire and
the SDreaders on both ends of
the aerial.
Editor Radio "Waves and Ripples:
1. How can you tell whether the cur
rent is D. C. or A. C. ?
Do you add water to the ammonium
phosphate in a rectifier or do you have
make more solution;
3. How do' you tell the negative and
positive leads of the 110 A C. current?
1. Place one of the wires over
an ordinary pocket compass. If the
needle begins to vibrate or fluctuate
continually in both directions the
current is A. C. If the needle turns
to one direction and remains there,
the current is D. C. Another test
is to place both wires in a glass
of salt water so that they are a
couple of inches apart. If the water
about one of the wires begins to
bubble, the current is D. C. and
that wire is the negative pole of
the current. If the water around
both wires begins to bubble the
current is alternating.
2. For rectifier use make a
saturated solution of the ammonium
phosphate.
3. As the Ar C. current is con
tinually changing in direction,
there is no such things as a posi
tive or negative lead to an A. C.
current.
Editor Radio Waves and Ripples:
1. Where can I get blue prints
of
radio receiving outfits?
L How many plates would bo re
quired in a condensor to receive luuv
miles it the plates were 3Vix3Vi and
the set would receive up to 6U0 meters?
a rat. ail ths narts of Buch receiving
tet be made in the ordinary shop?
R. C., WJiite salmon, wasn.
1. Write to the radio dealers ad
vertising in these columns.
2. The size of trie condenser has
nothing to do with the receiving
range of a radio set. It is used only
for tuning the wavelengths of the
receiving set in accordance with
those of the transmitting stations.
A .001 M. C. F. variable condenser
which is usually made of 23 plates
of about the size you mention, will
do excellently for tuning in wave
lengths from 360 to 2000 meters,
depending also on the size of in
ductance you are using.
Editor Radio Waves and Ripples:
1. In putting up an aerial for a crys
tal set and also an audion, 70 feet high
and 60 feet long, how many wires should
be used to get the best results?
2. How far apart should each wire be
if a three-wire aerial IB used?
3. Kindly give distances for both
sets. G. D. S.. Portland. Or.
1. A one-wire aerial from 100
to 150 feet lpng will give you the
best results for receiving radio
phone. 2. About three feet apart.
3. No type set can be given a
definite receiving range. This will
depend on many other things, such
as location, type of ground and mag.
netic or other interferences.
TMitor Radio Waves anl Ripples:
On my vario-coupler there is a brass
rod which extends through the main in-ni-ctance.
Since it is not threaded,
when turning It, the tickler coil refuses
to rotate Inside the larger coil. What is
there that I can do. so tnat tne tickler
coll will stay fastened firmly to the
brass rod? H. v., Portland, Or.
If you use a little judgment you
can easily find some way to fasten
the tickler to the rod. Might sug
gest that you fasten a small brass
elbow drilled for screws on both the
rod and the rotor ball. If the tickler
is not a wooden ball but a cardboard
tube, you will have to thread the
rod and fasten the rotating tube
with nuts both inside and outside.
Editor Radio Waves and Ripples
(1) I have wound a transformer coil
from an old Ford coil, as described in
Radio News for June, but when con
nected to a dry cell, neither primary nor
socondary coil will pass a current, la this
a siffn that the wires are broken?
2) 1 have a vibrator with good plati
num points. Is there any use I can put
sais to in the wireless game?
E. P., Castle Rock, Wash.
(1) Tes; evidently there is an
open circuit in both of your coils.
(2) The vibrator can only be
used to make and break a current
for a spark coil.
Editor Radio Waves . and Ripples:
1. Will the following set, consisting
rf 0-300 Cunningham detector tube, dou
ble slide tuner, potentiometer, grid leak,
variable condenser, 2000-ohm phjr.es,
iheostat, allow me to hear Portland aijd
Seattle? I live 50 miles south of Port
lard. 2. Will an inductance coil with 100
turns, of No. 24 wire increase the wavo
length ?
3. Which would be the best aerial, one
S0O feet long, 45 feet on one end and 65
"H'
as 500 miles at night or even far
ther at times. The Catalina phone
has been reported heard a distance
of over 703 miles with this kind of
receiver, but of course such results
can be attributed to exceptional con
ditions. (3) Simple auditon receivers of
non-regenerative type using small
antenna. This style of receiver is
very little better than the forego
ing crystal apparatus. It is sim
pler to handle, however, in that the
detector will hold its adjustment
under excessive jarring. It also may
be slightly more selective than the
crystal.
1 (4) Regenerative type of receiv
er with antenni- composed"' of two
or four wires 80 or 100 feet long
and at least 40 or 50 feet high. This
lsthe ideal receiver for the amateur.
For simplicity and reliability it has
no equal. One of its chief charac
teristics is that it will amplify a
weak distant signal until it is al
most as loud as a nearby station.
Radiophones can be heard satisfac
torily if there is no interference 100
or 200 miles in the daylight and
fairly well 500 miles at night using
headphones. Spark stations can be
copied as far as 2000 or 3000 miles
at night. "
(5) Regenerative receiver em
ploying two or three-step amplifier
and loud speaker. For public en
tertainments this is the logical re
ceiver. No headphones are required,
the incoming sound being carried
out into the room or hall through
a horn with the same degree of in
tensity as reproduction from a pho
nograph. Concerts from points 500
miles away or even farther should
be heard clearly at night. If geo
graphical conditions are favorable
radiophones may be heard 200 or
300 miles in daytime. If the re
ceiver Is of the long-wave type and
capable of tuning up to 25,000 me
ters, wireless telegraph stations in
Europe, Hawaii, the Philippine is
lands and all over the United States
can be heard atany time with this
apparatus.
(6) Audion receiver employing
both radio-frequency and audio-frequency
amplification. Limits to the
range of this style of receiver are
governed by atmospheric conditions
and interference troubles. It is the
most sensitive receiving apparatus
yei devisod and is fully able to de
tect low-power amateur stations
3000 or 4000 miles.
AND ANSWERS
feet on the other, or the other 85 feet
long and 75 feet on both ends?
4. What is the difference between In
ductance and honeycomb coils?
5. What is the difference between an
auditron amplifier and an auditron de
tector tube?
6. Please send hook-up for the set de
scribed above.
O. L. E., Gervaia, Or.
1. If connected in a regenerative
hook-up and with favorable condi
tions present, you ought to hear the
Portland stations and possibly Se
attle. ,
2. Yes, if used as a loading coil
in the aerial circuit.
3. The aerial 85 feet long and 75
feet high on both ends will be the
best for short-wave reception.
4. A honeycomb coil is one form
of an inductance in which the turns
are wound so that they are spaced
apart as far as possible within a
small radius, in order to avoid ca
pacity effects.
5. The detector tube is used as a
detector only while the amplifier
tubes are used in amplifying units
for the best results.
6. The hook-up has been mailed
to you.
M?dlvh .Radio Waves and Ripples:
(1) WhlCh WOllM ho thA K . T
. , .u ucbi uiU K1VC
rcete?? ' 10086 couP'r t a vario
us.?,? t V ?I diaeram in last Sunday's
5,'8, ?. "-fund and the detector
were attached. Are they attached to the
rod running through the variometer?
wire ST U)d you attach ground
wire to a moving automobile?
. A FAN, Portland. Or.
(1) The variometer is the most
f0r snort-w radiophone
-""" conjunction with
crystal detector.
A ength of lamp cord with
Sn luh'.? 18 "8ed t0 C0Dnect
up with the routing coil so that
Xl t f,asily rvolve in and out of
oLatiunary cou.
(3) The best plan is to use the
- lIJe gTouno.
Editor Radio Wavp, h mnnu.
(1) What Size WlrM Ib the Ki-. j
,r"K up regenerative receiver?
t-J COUid 1 Set inv ittr w..
raising the detector tube about 3 inches
from the base and placing the grid con-
RADIOPHONE SET AT VANCOUVER BARRACKS
NOW IS ON REGULAR BROADCASTING LISTS
Vocal and Instrumental Musical Talent and Phonographic Records Will Serve Audiences Two Nights
Each Week, According to Schedule, and Great Concerts Assured to Fans.
VANCOUVER BARRACKS RADIO STATIOJT AT VANCOUVER, WASH., WHICH IS NOW BROADCASTING
MUSICAL PROGRAMMES ON A REGULAR SCHEDULE.
J ANCOUVER Barracks radio
I station, CL8, as it is known
among Portland radio fans, is
now on a regular broadcasting
cheddule two nights of each week
Thursdays and Sundays between 8
and- 9 o'clock. Vancouver musical
talent, both vocal and instrumental,
will be used to entertain the fans
one of the nights, according to Ser
geant Benjamin Silvermaster, radio
operator in charge of the station,
while the other night will be given
bver to the broadcasting of newly
released phonographic records pro
vided by a local musical firm.
Although station CL8 is of low
power as compared to several Port
land radiophone stations, it has been
VISITORS AT AUTO CAMP GROUNDS ENJOY
RADIO CONCERTS SENT BY THE OREGONIAN
High-power Receiving Set and Magnavox Are Installed in Community Store Music Is Heard More Than
600 Feet Away Feature Is Proving Attractive to Restless Autoists.
xsmxtii,vr - .'' .rj:.t j
PORTLAND AUTO CAMPERS BNJOYlJfG A RADIO CONCERT BROADCAST FROM THE OREGONIAN
R'
ADIO concerts both afternoon
and evening is the latest con
venience offered to the visit
ing autoist stopping at the Portland
auto camp grounds.' A high-power
receiving set and magnavox lately
installed in the camp community
store is now proving one of the best
Inducements ever offered to the
restless autoist to stop and linger
denser under it, thus making a short con
nection?
S) Would a variable condenser of .001
capacity produce as good results as one
of .0005?
A FAN, La Center, Wash.
(1) No. 24 double cotton covered
magnet wire is the best all-around
size for winding of tuning coils.
(2) Any method will do very
well as long as the grid lead is
run as short as possible.
(3) This will depend upon what
wave lengths you desire to pick up.
For short-wave radiophone recep
tion the .0005 capacity will be ex
cellent. For longer wave lengths
use the .001.
Editor Waves and Ripples: 1. Would
the super-selective receiver described in
the April-May issue of the Radio News
receive a radiophone around a 1000-mile
range or as good as the regenerative re
ceiver using two variometers and one
vario-coupler, all other conditions being
good and the same for both sets?
2. Can this receiver be used only for
one wave length because of neither the
primary and secondary coils being
taliped?
8. If it can be used for different wave
lengths, what would be its wave length
range ?
4. If it cannot be used for different
wave lengths, should the primary be
tdpped, or the secondary, or both?
5. What kind of one tube V. T. set
which does not cost over $40 or J45
would vou recommend to get the best re
sults for. short-wave reception?
A FAN, Vancouver, Wash.
1. For all-around short-wave ra
diophone reception, the variometer
regenerative receiver is the best
known today.
2. The super-selective receiver
described in the April-May Radio
News is tuned to different wave
lengths by varying the condensers.
3. From 100 to 600 meters.-
4. The type receiver described
does not require tapped inductances
as the wave lengths are varied by
the use of condensers.
5. The single-circuit regenerative
receiver using a vario-coupler with
the secondary coil as a tickler is an
excellent type outfit for long-range
work and can be assembled for
around $35 to $40, including bat
teries and telephone receivers.
going "great guns," according to
hundreds of Portland radio fans who
report receiving the army station's
radio programme extremely well.
The apparatus consists of a signal
corps set manufactured by the West
ern Electric company. By means of
a few adjustments in the set itself,
and the use of a six-wire counter
poise system, surprisingly good re
sults have been obtained. The modu
lated C. W. radio telegraph signals
have been reported heard in Hawaii
and successful voice communication
has been easily maintained with sta
tions in Idaho and California.
Under the direction of Sergeant
Silvermaster, chief radio operator at
CLS, the station is used as a school
for training radio operators and sig
TOWER FOR THEIR ESPECIAL BENEFIT IjAST
awhile within the vicinity of the
Rose City.
A recent report phoned in from
the ca;mp grounds to The Oregonian
during the broadcasting of a con
cert rfom The Oregonian radio
tower, stated that the music was
coming in so loud and clear at the,
camp that it could be heard more
than 600 feet away from the mag
navox. Several Terms in Radio
Explained to Fans.
Amplification, Filament, Yario
Coupler, Plate Battery Defined.
THE following are explanations of
several terms which some of the
new fans are meeting amd finding
difficulty in understanding their
application in radio telephony:
Amplification. Amiplif iers em
ploying the vacuum tube may be
divided into two classes, the radio
frequency amplified- wMch increases
the strength of the radio-freq-uency
signals In a receiving set before it
passes through the detector tube,
and the audio-frequency amp-lifiier
which increases the strength of the
signal after it has been changed
by the detector tube from an in
audible to an audible frequency.
The Vario-Coupler This type of
inductive tuner functions very effi
ciently as a receiver of short waves,
partioularly when combined wi'th
two variometers and a vacuum
tube, one of the variometers being
connected in the grid circuit and
the other in the plate circuit.
A Filament or "A" Battery. A
storage battery when used as a
source of filament current is com
monly of the lead plate-sulphuric
acid type and is provided with a
variable resistance to limit the
amount of current flow. The po
tential is usually 6 volts and the
capacity may vary from 36 bo 100
ampere hours. The battery should
be recharged at the normal rate
when the specific gravity has fallen
to-1.175. The level of the electro
lyte must be maiintained at least
one-half inch above the tops of the
plates by the addition of distilled
water.
The Plate Batten-y. In a receiv
ing circuit using a vacuum tube,
the plate of "B" battery supplies
the current which actuates the dia
phragms of the receiving tele
phones. This battery may be of
nal men for headquarters companies
of the brigades, regiments and bat
talions. The entire radio station has
been practically built by Sergeant
Silvermaster, who is an overseas
veteran and who has been stationed
at the Barracks Bince last fall.
A four-wire inverted L which rises
at one end from a 125-foot pole to
the heighth of 150 feet at the other
end fastened to the top of a pine
tree, is used at the present time as
the station's antenna. A specially
constructed symmetrical ground has
been built, terminating in a deeply
buried mass of metal. For radio
phone transmission, however, a
counterpoise stretched directly un
derneath the antenna ' is used en
tirely. "
WEEK.
The magnavox has been placed
with its mouth pointing outside of
the store so that there is room for
several hundred persons to sit or
stand about and hear the music
comfortably. It is reported that im
promptu dances are held at the
camp now and then whenever dance
music Is broadcast from The Orego
nian and other local transmitting
stations.
the storage or dry cell type amd is
required to rurnich but a smal
amount of current. A type in een
eral use consists of 15 small dry
ceiis seaiea in a block with an in
sulating compound. These ceils are
connected in series giving a total
voltage for the -block of 22V, volts.
Taps may be taken from interme
diate cells to secure a lower volt
age. A new scheme for "wired wire
less" is in contemplation by certain
radio experts, by means of which
millions of farmers now out of the
regular broadcasting range will be
enabled to "listen in" to market and
agricultural reports with small
crystal sets, which have a receiving
range of 15 to 25 miles. This scheme
takes into consideration the broad
casting of speech by means of the
electrical power lines which cover
the country with a network of wires.
A sending station may be at one
end of the wire which penetrates
many miles into the "backwoodsi'
and any farmer who is located less
than 30 miIes or so from this wire
can listen in' with ase with a low-
priced crystal outfit.
Radio Notes.
EFFORTS- of experimenters to
work with indoor loop antennae
hai developed the conclusion that a
loop will not work properly unless
it is built according to some kind
of system. One loop will work mag
nificently and another will not work
at all, or. if it works, will operate
poorly. What is the correct speci
fication? The best practice seems to indi
cate that a loop four to' six feet
square, having six turns of wire
spaced one-quarter of an inch apart,
will outwork any other forra of
loop on the market, for shortwave
work. For longwave work, the loop
FREE
DAILY
PERFEGTONE
TMAOC HARK (
Radio Frequency and
Audio Frequency
SET
Lcctro Mfg. & Sales Co.
331 Oak St., Portland, Or.
-HALQWA"
COMPLETE PARTS
For a
SINGLE CIRCUIT
REGENERATIVE RECEIVER
$21.00
INCLUDING HARD
RUBBER PANEL
HALLOCK & WATSON
Radio Service.
183 Park St Portland, Or.
Beautiful finish panels.
Black, brown and mahog
anite. Best insulation for
radio, resists warping.
Standard Dials 3 in. and
1 in., knobs, sockets, bases,
etc.
Dealers write
, GOODYEAR RUBBER CO,
Pacific Coast A sent
Portland - - 1 Fourth St.
Americas Hard Rubber Co.
We are manufacturers of the Beet
Cryetale, Mounted and Unmounted
Positively Sensitive, gold with Guarantee.
Insist on U. K. rwtji.1u-
Everythlng !n Radio Supplies.
U. 8. RADIO CO. OF PEUSTA., Inc.
Ferry and Diamond St. Pitteburf. Pa.
is not worth considering, and is
more of an experiment than a success.
i .
The following constitute a radio
receiver in its simplest form: A
crystal detector, aerial and ground
and head receiver and battery.
The crystal detector is a small
piece of sensitive crystal such as
galena, silicon, etc, embedded in a
piece of solder f lead.
The aerial may be a bedspring, a
wire fence, a length of wire dropped
from a high window or that of the
customary construction.
The ground wire may be con
nected to a water pipe, a piece of
copper plate burled in the ground
or to a water pipe driven in the
ground. '
Across the circuit between the
aerial, detector and ground the tele
phone receiver should be connected.
This instrument will hardly pick
up the spoker. word, although under
excellent conditions and when close
to a transmitting station it may,
but it will pick up spark signals
and is a very good and inexpensive
set for the "little fellow" to experi
ment with.
A good rule for estimating the
wave length of the antenna Is as
follows:
Add the length to the lead-in. Add
to this ground and if there is more
than one wire, one-third of the
length of the aerial. This is ili feet.
Divide this total by two and add
the result to the addition already
made. This will give the approxi
mate wave length in meters. Ex
ample: Length of aerial, 65 feet;
lead-in, 12 feet; ground, 20 feet; 65
plus 12 plus 20 equals 97; add 22,
equals 119; divide by 2. equals 59;
add 199 to 59, equals 178. equals
wave length. Here the fixed factor
is to add to the length of the aerial,
the ground and the lead-in one
third of the length of the aerial.
This will help the amateur to de
termine the natural wave length of
his aerial. If he will not have this
longer than about 160 meters, he
will not exceed his allotted 200 me
ters after he has added the addi
tional length to his antenna circuit
by the secondary of his transformer
and the condenser.
Radio receiving stunts are being
reported almost every day. Not very
long ago a young radio fan "built"
a receiver that was small enough to
go in a matchbox. One clever girl
reporter felt she must have her
radio to beguile the tedium of
"waits" in the ante chambers of the
great and at public meetings! So
a colleague devised a radio garter
for her use. The receiver is in the
garter and is connected with the
ground and the woman's ear by
eyeglass snap-chains.
Another tiny set is sold in the
form of a ring, and a third is exactly
like a slim pocketbook.
Some New York hotels now give
you radio to tea.. The radio appa
ratus keeps "my lady" informed of
the world's doings when the orches
tra isn't playing.
There is a new hotel going up on i
Long Island which is to have radio
in every room! There are to be 600
rooms and 600 radio sets. The own
ers expect to pay 1150,000 for this
privilege. But who doubts that they
will get It back?
Nor Is old Europe so far behind In
the matter of radio as many imag
ine, although every government
holds a practical monopoly of its
particular ether. Several of the
Berlin-Hamburg trains have radio
stations on board which are at the
disposal of passengers. And two
French railway companies are to
install radio phones1 c-n their trains.
WHAT OTE1R8 SAT
Hears BIS Hilfti
With your Cramer Receiver
I have heard Chicago. Kan
sas City. Lincoln and Dea
Moines frequently. Couwi
in fins. T. O. Warfield.
Omaha. Kebr
Bad It Woridnf in
Tan Minatai.
With a loop hunt from the
picture moukfcnx I wa
hearing a concert ten aun
utea after the Cramer Re
ceiver reached my home.
Ernest Weymuller. Omaha,
Nebr.
Relieves Loneliness
1 am a lease-boa for ah oil
company on the job day
and night tea miles from
town. Your receiver sure is
a cure for loneliness. W. T.
Blanchard, Rosalia. Kansas.
Music Without Aerial.
Your set is so efficient I
heard (KTW Chicago) mu
sic using my body as an
aerial. Perry McArthur
- Chicago.
The Cramer receiver is a one
tube outfit consisting of s
variometer and detector tub
arranged in a new circuit thi
excells any hook-up yet dis
covered. Price so low it will
surprise you not complicat
ed like some. You can't go
wrong, even if you never saw
a receiving set before.
BlBlllal.BlgBaS.BagaHaBBaS
We Carry a
Complete Line
of
RADIO
and SUPPLIES
WRITE FOR OUR FREE RADIO CATALOG, NO. 29
Si at II S ! EAST FIRST AND
RADIO FOR CAMPING TRIP
CAN BE ARRANGED EASILY
Two Types Are Most Successful and Will Bring Concerts From
Twenty-five to Two Hundred Miles Away.
''r : r
ARB you taking a radio set with
you on your camping trip thil
summer? i
If not, why not? The world's news
and musical entertainment beside
the biasing campfire are yours if
you will but take advantage of
them. It woi't take up an awful lot
of room in your little old flivver, and
as for an aerial, a roll of wire car
ried along will do the trick nicely.
There are two types of sets on the'
market today which are very satis
factory for the camping and vaca
.tion trip.
If you're handy with tools, you
can easily make them. The first type
is the simple variometer crystal set,
the construction of which has been
described several times in these col
umns. With this type of set the con
certs can be received from stations
25 miles away. The parts required
for this type are a small variometer,
a variable condenser and a crystal
detector. If you make the set your
self connect it up as in diagram
No. 1 and assemble it in a small
portable case. t
Type No. 2 is the regenerative re
ceiver, which is very sensitive and
will bring in stations as far as 200
miles away. The parts for this set
are a loose-coupler or a, vario
coupler, a variable condenser, and
an audion control panel consisting
of a tube socket and filament switch.
You will also need for this type a
B battery and a six-volt storage bat
tery. However if you are going
camping in your auto, you can use
the storage battery of your machine
for the A battery.
Connect up this type, as in dia
gram No. 2. The sketch underneath
this diagram shows a good method
of assembling such set in a portable
case so that it will take up but little
room. The secondary of the coupler
acts as a tickler on the plate circuit
and produces regeneration. Be care
ful to have the negatives of your
two batteries connected together as
shown.
A two-stage amplifier and mag
navox can be connected to this type
set if it Is desired to entertain a
big crowd with the radio features.
When you make camp for the
night, attach a rock to one end of
the coll of wire and throw one end
of it as far up into a high tree as
you can. It will be better if at least
25 feet of the wire is insulated so
that tt will be clear of any of the
tree's branches. -
For a ground drive a metal spike
1MM
THE air today tonight will be full of enter
taining, informative events Music, Concerts,
Grand Opera, Classical, Jazz, etc., also news events;
baseball scores; market reports; weather forecasts.
Why let all this go over your head why let yout
neighbor enjoy all these advantages when for a small
sum you too can hear them all absolutely frer'
With a Cramer receiver you can
Hear Concerts, Music, Ball Soores
Anything Within Si Miles of You.
Farmer will find this set will
ttftv in itaelf many times oven
Bring th weather forecast
daitv. enabling them to pro
tect orop in advance; brines
hourly market reports, eVw
Vaotiotitt find it ids si to
tak in o- Mit camnint,
Gv tllutrat9i Circuia
ni -ricev
Send your nam today (pocfat vtt do awt tr mr F RE I
UluttnUd circular inA pru ( M nfwu
your denier" wwu.'
W. R. CRAMER COMPANY
4104 IJo. Twenty-fourth Stroe' .
OMAHA. KESK
'JONES LITTLE WONDER'
Crystal Set
Mounted Special
la stock:
Double Siik
Magnet Wire.
Radlotron V. V.
Tubes. Spe
1 for One
Week, M-B5.
Head Sets
1000 Ohms
Single
2000 Ohms
Double
$4.95.
.MORRISON STREETS
, $C.15
QOZ
A
I fir' ' -ill
Diagram 1 Hook-op for variometer
crystal net for short-range recep
tion. Diagram 2 Hook-up for
portable regrenerative receiver and
sketch, of case In which such net
ean be assembled for taking along
on a camping trip.
in wet earth. Or better yet, attach
one end of a wire to a piece of metal
and throw it in a nearby stream or
lake.
Radio Fans Need License.
CLEVELAND. Radio enthusiasts
here must now paY a license fee of
50 cents, both for sending and re
ceiving. City council recently passed
an ordinance requiring licensing and
inspection of all radio stations, pro
fessional as well as amateur, in this
city.
SEE THE NEW
General
Electric Set
Now on display in our store.
Come in and hear the
BROADCASTING
Daily from 1 2 noon until 6 P. M.
COMPLETE SETS
OR THE MAKIN'S
See Us
Ten Years in the RaJio Business
ELECTRIC CO
75 Sixth St. Operating K.Q.Y.
Stock Situation
IMPROVED!
We can make im
mediate delivery
on practically all
radio equipment.
Complete InMtallation
If Dvaircd.
(InNtallern of
Oregon In a Radiophone)
Ship Owners
Radio Service
J. B. WEED, Manager.
Broadway 1931.
310 Oak Street.
E.L. Knight & Co.
449 WashinKton St.. Near 12th.
Brondway 145.
Just received the new Western
Electric two-stage amplifier and
Loud-Speaker
$161.00
We Carry a Complete stork of
All Radio SuppIieH.
Concert Every Saturday Night.
"KNIGHT BAKES DAY THE ELECTRIC WAY"
COMPLETE
RADIO SEft
$14.50 up
We carry all the makin's
and show you how.
Chown Hardware Co.
147 Fourth Street
t& to IPO