SATURDAY, OCTOBER 12, 1929
iHE CAPITAL JOURNAL. SALEM. OREGON
PAGE SEVEW
'
RADIO SQUEALS -BECOME
MUSIC
IN APPARATUS
By C. E. BUTTE RFIELD
New York (A The squeal ol radio
baa been turned into music.
Known to technicians as oscilla
tion, this electrical condition which
radio engineers worked so long to
eradicate from the broadcast re
secetver Is the foundation of the In
vention of Leon Theremin, Russian
scientist and inventor.
He has made oscillations behave.
They now come from the loud
speaker as sweet tones of music
rather than growls and screeches
which once were the bane of the
owners of regenerative and radio
frequency sets.
Professor Theremin really has
gone the meat packer one better.
The packer sells practically every
thing from the hog but the squeal.
The inventor uses the radio squeal
to make melodious tones.
How it it done? Tubes Just like
those of the radio set produce the
squeal that results In a combina
tion of tones duplicated by no other
musical instrument.
Eight tubes housed in a compact
cabinet with a music sheet rest,
generate and amplify the oscilla
tiuns. There are two circuits to
build up oscillations. These pro
duce a beat note, or a third series
of oscillations, in a mixing tube.
which Is then fed into the audio
stages and loudspeaker.
The Instrument, named after the
Inventor who has granted an option
on exclusive patent rights to the
Radio-Victor corporation, has three
227 tubes as oscillators. The mixer
tube is a screen grid- Two 171a's
are audio amDlifiers. and a 120 acts
as a volume control balance tube.
Action is entirely electrical. Un
like anv other musical instrument
there are no strings or mechanical
devices to produce musical vibra
tions. Tone variation and volume
is regulated merely by waving the
hands in the air.
To the uninititated. a person play
ing the device seems to be an or
chestra leader without an orchestra.
There Is music but no apparent
means of producing it visible ez-
ccpt something resembling a digni
fied music rack.
Movements of the hands are all
inportant. They alter the magnet'
lc fields which encircle two rods
that serve as antennae.
One rod, a straight bar. controls
tone or pitch. The other a looped
horizontal bar. rcculatcs volume.
Nearness of the hands to the rods
determines volume and the fre
quency or pitch of the music. The
closer the left hand the volume
rod the sorter the note. Hit?h tones
are produced with the right hand
near the straight bar.
AC OPERATING COST
EASILY DETERMINED
New York (T) The worried house
holder, included in whose monthly
duties is the paying of the light bill,
often wonders if it Isn't an expen
sive proposition to run an AC set.
Numerous tests have shown that
this worry is useless. The cost of
AO receiver operation Invariably
will be less than the former cost of
charging the storage battery and
buying new B's.
It is possible to make a simple
check to find exactly what is being
paid by determining how fast the
metal disk in a house electric meter
revolves.
Outlining . this scheme, George
Lewis, tube manufacturer, says:
"If with only a 75-watt lamp
turned on. the disk revolves five
times a minute, and with only the
radio set going it revolves 15 times
per minute, it is obvious that the
set uses three times as much power
as the 75-watt lamp, or 225 watts.
"Multiply this by the number of
hours a month the set is in opera
tion, divide by 1,000, multiply by the
cost of electricity per kilowatt hour,
and there you are."
DEMPSEY APPROVES
FIGHT BROADCASTS
Chicago (VP) Jack Dempsey has
enlisted broadcasting to aid In his
boxing promotion here, permitting
microphones at the ringside, a
practice that his rival Paddy Har
mon, would not admit to his sta
dium. Dempseys bouts are in the
Coliseum.
The former heavyweight cham
pion will sponsor six shows at the
Coliseum. He holds that ringside
broadcasting encourages rather
than discourages attendance, as
Harmon contends.
Jim Mulltns, who promoted bouts
In the Coliseum last year, sanc
tioned ringside broadcasts.
EFFICIENT FOUR-TUBE AC RECEIVER
DESIGNED FOR NEW SCREEN GRIDS
v
. ANTENNA C&L
5HiLDD - TAPPED
EITHER 10 OR 20
TURNS I
NOTE- ALL VARIABLE CONDENSERS
.00035 WITH 5-PLATE TRIMMERS
SHIELDED -TAPPED f SHIELDS
10 20 ' mKOANCt OWL
TURNS r- " j -r 1
'shaft p?- . ct P , . , .
S . j
-METAL SUB-PANEL
50.000
"M w L. '4' "
W B-0 6 B75 8- C-3 Co2 AC
Four tubes have been Incorporated in the above receiver to duplicate the efficiency of some sets
having a greater number of tube a. AH equipment is standard.
By C. E. BUTTE RFIELD
(Associated Press Radio Editor)
New York Fruitful experi
mentation has produced the Quar
to, a four-tube AC screen receiver
that works.
Selectivity, sensitivity, and tonal
quality have not been sacrificed in
the set, which gives an Indication
of the possibilities of the screen
grid tube. Its ability to get dis
tance as well as to make crowded
locals behave as demonstrated
early in the experiments.
Three of the tubes were screen
trrids, and the fourth was a 245 or
345 power output. These four were
Location of the band filter in the
first stage was necessary. When
it and the lmpedence statje were re
versed, the felectivity dropped con
siderably, although there was an
increase In volume.
With a single stage of radio, am
plification was sufficient to make a
dynamic or condenser speaker talk
entirely too loud. Besides, the
noise level was reduced somewhat.
Hum was at a minimum.
By tying all variable condensers
together with on extension shaft,
single control was effected, with a
trimmer on the antenna condenser
selectivity and a following impe
dance coupled stage gave amplifica
tion. Of course, there was consid
erable amplification in the band fil
ter, but Its primary purpose was
to sharpen the signal before it was
passed on.
bination. A band filter stage gave
another as detector.
The tuning circuit was a com-
PAKTS LIST FOB QUARTO
bCKEt.N GRID BCCE1VEB
1 Tapped antenna coU
1 Band Filter coll
1 Impedance coll
(All coils matched for .00035
condensers)1
4 .00035 variable condensers
4 Mideet condensers cut down to
three plates
1 Audio transformer (tow ratio)
I Output choke
3 Five-prong sockets
1 Four-prong socket
5 RP chokes (85 mtllihenries
1 2 or 4 mfd. blocking1 condenser
4 H mfd. bypass condenser!
1 .001 condenser
1 .006 condenser
1 .00025 arid condenser with cllpi
1 arid leak (not over 1 meg.)
1 18-inch condenser extension shaft
I drum dial
1 Shield (6x7 In.) to be cut down
1 50.000 ohm potentiometer
2 Lenetns spagettl
1 Foundation unit including 7x21
panel. 12x20 metal subpanel.
hardware, hookup wire, antr and
grd. binding posts, speaker ter
minals and two Cx7 shields. (If
wood baseboard Is used, ltema
In foundation unit must be ob
tained separately.
Experimenters desiring to dupli
cate the ormlnal layout may obtain
list or parts by addressing Radio
Editor. Associated Press. 383 Madi
son avenue. New York.
mounted on the panel for occasion
al adjustment.
Volume was regulated by a 50,-000-ohm
potentiometer in the screen
grid power supply lead. The B
power pack was designed to take
made to do the job adequately be
cause the screen grid lends Itself
to flexibility in circuit design. Two
performed as RF amplifiers, with
daily talk on newspaper work over
WTMJ, owned by the Journal. Ills
audience liked him so well that it
demanded more.
Finally he began a series which
he described as "Jazzistory" In
which he retold, in slang, important
events,, from Columbus' discovery
of America down to Abraham Lin
coln. When he reached Lincoln, he
asked his listeners if they wanted
the complete life story of the mar
tyred president. They did.
During the Lincoln broadcasts
some one wanted Lawrence to write
a book on Lincoln.
He declined, and started another
broadcast but dollar bills for the
non-existing book began to float in.
"There was nothing left to do but
write it," Lawrence said. "I had
saved my Lincoln notes and uesd
them."
Berlin, (P) Twenty Frenchwo
men, mostly teachers in Paris
schools, spent their summer vaca
tions as guests here of the League
For the Rights of Man. They
said they would tell the youth of
France that Germany is peace-lovincr.
COLLEGE-COURSES
BY RADIO PLANNED
Cleveland (Listeners of WTAM
may attend Bald win -Wall ace col
lege at Berea, Ohio, this year by
remote control.
Classes will be conducted over
the air by the local station In con-
Junction with the college. Two
semesters of work divided into 17
lectures each will be given.
The subjects will be astronomy,
chemistry, biology, physics, voca
tional guidance, English, history,
public speaking and sociology. The
lectures will require 15 minutes.
CONVICTS BUY RADIO
Greensboro, N. C. (P; Prisoners
at the central North Carolina pris
on camp have joined in the pur
chase of a radio receiver on the
installment plan. They hear church
services Sundays and are allowed to
listen in on other programs during
the week.
HISTORY IN SLANG
IS AUTHOR'S WORK
Milwaukee. Wit. (TV-Radio has :
turned Larry Lawrence, newspaper
man and ' historical broadcaster, '
Into an author.
Lawrence started out on the Webb
City, Mo., Sentinel, going to Mil-1
waukee from Chlcigo el3ht yeara
ago to Join the staff of the Mllwau- 1
ee Journal. There he remains ex
cept when the radio beckons. I
Radio first began Its attempt In j
ehanglng his course of life two years ,
go when he was asked to glv a i
Vibbert & Todd
Templetone Radio
ELECTRICAL SUPPLIES CONTRACTING MOTOR
REPAIRING REWINDING! INSTALLING
Telephone 2112191, S. High Street
AN OPEN LETTER
Sec'y of State Office,
From Vibbert & Todd, Salem, Oregon.
To Mr. B. B. Williams, State House,
Salem, Oregon
Dear Mr. Williams:
Thru Radio Station KGW, Vibbert & Todd. Salem's Franchise
Dealer for the Templetone Radio Receiver, have just learned that
your letter giving the reasons why you liked the Templetone Radio
Receiver, received the unanimous approval of the Judges appointed
by that Station for the Temple Letter Contest just concluded.
It Is not only our pleasure to congratulate you but to present
to you a Lowboy Templetone Receiver in compliance with the term
of the Contest. This Receiver is complete In every detail ready for
service in your home.
Your Templetone Radio Receiver is now on display in our win
dow at 143 N. High street, there also you can see your letter along
with letters from other contestants, who listened to a Temp'.e.one
Receiver and too enjoyed Its marvelous pure tonal qualities,
It Is our hope, Mr. Williams, that you and your friends, along
with our other many Temple Radio Owners, will continue to secure
the enjoyable entertainment that you aptly expressed in your letter
Cordially,
, VIBBERT fc TODD.
into account this additional resist
ance, which in effect was shunted
across part of the voltage divider
of the pack.
The AC filament supply lead
was common to all tubes, as each
operates on 2.5 volts. Only four
plate and screen grid supply leads
were necessary, 25, 180, and 75
volts. Two other leads supplied
C bias, 3 volts lor the screen grids
and approximately 50 for the 245.
In the original layout a metal
subpanel was used, although a
wooden baseboard will do. The
metal subpanel came already
punched, but some additional holes
were required, as it was not orig
inally designed for this outfit. If
wood is used, it should be mounted
on cleats and raised an inch to
permit subpanel wiring and the
mounting thereunder of several of
the bypass condensers.-
All coils and condensers should
be as closely matched as possible
to permit accurate tuniav? with a
single control. To overcome any
discrepancies, trimmers were in
cluded on each condenser, all but
that at the antenna being mounted
on the shields.
SEALS GUARDED.
BY (I. Si NAVAL
RADIO STATION
Washington WV-On St. Paul la
land, where only the bark of seals
and breakers of the Bering Sea dle
turb the stillness of "the top of the
world," radio binds a small com
munity to the outside.
An Isolated outpost, Ice-bound for
many months and even without a
cable to Join It to the mainland, Its
only connecting link Is the radio
station maintained by the U. 8.
Navy.
The radio'a mission is to enable
strict governmc .it surveillance of the
seal herds whose only land home lies
on the islands of St. Paul and St.
George, 40 miles distant.
By wireless, representatives of the
bureau of fisheries keep In contact
with the revenue cutters which po
lice the waters, and with the other
government stations In Alaska and
the United States.
From the primary function of
guarding the seal herd, the station
has assumed further Importance as
the only link binding the bleak
community to the world. It Is an
outpost of military value to connect
Siberia to the western hemisphere,
and has been equipped to give com
pass bearings to vessels.
Thirteen men. under charge of a
chief radio operator, run the station.
The station has two transmitters,
one of two kilowatts, operating on
medium frequency, and one of a
single kilowatt, operating on high
irequency.
Press news Is copied by the oper
ators and programs broadcast by
commercial stations are easily heard.
Reception is good, with little trou
ble from static.
Decision to hold the annual
trade show of RMA In Atlantic
city In 1930 was based on a de
sire to bring the exhibition east
after three years In the middle
west. The date is to be selected,
but it will be some time in June.
Majestic Radios
Don't buy until you bear them
Your own terms In reason.
Vibbert & Todd
GET GOOD RECEPTION
KANSAS SALT MINE
Hutchinson. Kas. (P) Radio re
ception has been accomplished at
the bottom of a salt mine 045 feet
below the surface.
An ordinary set was used, with a
wire stretched to adjacent Umbers
as an antenna. Resting on a crystal
salt floor, the set picked up seven
stations within half an hour. In
cluding broadcasts from Chicago.
Kansas City, Cincinnati, Louisville
and Des Moines. No special attach
ments were used.
191 S. tilth St.
I'bone 2112
-SI
,Hr -"j J' am it M aV - ' 5f T LfW I 7 iilX A IB m Bi'-i ' Ji
Mighty 1
i Monarch oj the Air
iifrpl QH Power Defection and the new -45 tube ptu four
' tuned stages of radio frequency. Abtolulely qo
hum or oscillation at any wave length. Automatic sensitivity control gives
uniform range and power all over the dial. Improved Majestic Super
Dynamic Speaker. Heavy, sturdy Majestic power unit with positive voltage)
ballast Insures long life and safety. Early English design cabinet of Amer
ican walnut. Instrument panel overlaid with genuine Imported Aus
tralian lacewood. Escutcheon plate
and knobs finished in genuine silver.
TIME PAYMENTS ... In the pur- J
chase of Majestic Receivers are
financed through the Majestic Plan
at lowest available rates.
Complete With Tube
Grigsby-Grunow Company, Chicago, U. S. A.
World's Largest Manufacturers of Complete tadlo Sets
t tam Lrm
miranniina
a
3
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.. - ...... in
lit
RAD
Imperial
Furniture Cauis
'nilUJlllIliiEMlU lli:ilUiIliil!ll(TIU111 !t!tf III lIITllIHTUril till M1IIIlli:UUaUIUlliUULimilUUUllUUlUa
SALEM -LEAMKN
Crosley
m
A
DD
tuua
iiaV
SCREEN GRID
8 TUBES
PRICES:
$122 t0 $172
When you think
Radio
think of
RADIO
Headquarters
175 S. High St. rhone 1101
FACTORY MAN HERE
TO PRESENT AWARD
Vibbert and Todd, Salem's fran
chise dealer for Che Templetone
radio receiver, reported a visit from
Artbur 6. Detach, factory repre
sentative of the Temple corpora
tion, Chicago, mixers of the popu
lar named Temple receiver.
Mr. Detach came to Salem
expressly to congratulate B. B. Wil
liams of the ittcreetary of state's
office and to assist Messrs. Vibbert
and Todd in presenting Williams
with a Templetone radio receiver
that be won recently through a
Temple letter contest Initiated by
radio station KGW of Portland.
Both Vibbert and Todd stated
that so many excellent and worthy
letters were received from Salem,
contestants that they regretted
very much that they only had one
Templetone radio receiver to pre
sent.
BUN CLOCKS BY RADIO
Washington (P The federal ra
dio commission has granted the EU
gin Watch company the use ot a
wavelength to conduct experiments
in the regulating of watches and
clocks by radio.
ou
IS EVE1
law
mmuimiiMi'.ii
imms:
J:;.i!;;ivla
imuwrnm
iiBplp
k P -ssSSKS
1
19. S. n';h St.
tYTIIINC f0
1 . a radio .L.tbcu
-.tuck" .
. to eao"0. A flavor
Taos"
Osocat and
aitlant switch prrmits trtmem
dout volume of TempU to
bt to tent d for local mm,
WIT1I TUBES
VIBBERT & TODD
Phone 2112 Salen
0 1" TKMPLB COD
Salem, Oregon
O TKMPLB CORPORATION
utility I&adio at a Price!
ni
BALANCED - UNIT
All-Electric
THE LOWBOY
Genuine Oriental walnut and bird's
ye maple give this cabinet a rich
distinction such as yoa bad never
hoped to find at the price. Pbilco
matched Blectro-bynamic 8 psalter
and Acoustic Equaltsera, built-in,
give It anaur pasted tonal fidelity.
Furnished either with NraUodyna.
Plus or Screen Grid circuit.
JVeuf rodyne Hits
Screen Grid $150.00
Complete with all Tubes
BE SURE
TO IIEAR THE
NEW PI1ILCO
BEFORE YOU
BUY ANY RADIO
THE same superb radio that yoa have seen
announced so extensively in The Saturday
Evening Post and many other magazines is
here today for your inspection I Come in and
hear the pure, rich tone of the new Philco
Lowboy. See for yourself its entrancingly
beautiful cabinet, a distinguished addition to
the furnishing of the finest home.
Balanced Units
By extraordinary engineering, Philco has at
tained a precise electrical balance of all units,
resulting in a new high standard of tonal
fidelity, split-hair selectivity, and great dis
tance range; and every Philco is balanced to
use TWO 245 power tubes, push-pull.
Free Home Demonstration
Wa will gladly deliver this superb rhllco
Lowboy to your home on Free Demonstration.
Prove to yourself Its rare purity of tone, re
markable selectivity and vast distance range.
Easy payments, if you decide to buy after trial.
Call Look Ilear
Come In see and bear this remarkable new
Philco. Examine the various beautiful models.
Select the one you want on Free Dcmonstxa
tk. Call today or telephone.
Sold on Our Easy Payment Plan
'1
ft