PRESENPSET;
Add a ‘iMuffler’i to Your Receiver
B+ 450R65
A;' A+B-
lime: tum RADIO EREQUENCY-
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:. tun in\ l' “FILER,
limit-t l'ncmeer.
t ..v E to be "Radio
audio for
\ interfer-
y from re-
srts should
.- somewhat.
' ”into to lessen
= more appropri-
Z
-’ rrreivers cause
irradiating
. :rrable discus-
_ 2. receiver is
“‘“emier but as
and even
cdyne types
rcper op-
and cause
'izt
y Xot Immune.
:Nrrt‘ssion is that
' .ers cannot
the antenna
. with sur-
TEtis is true to
‘ All receivers
must have
to operate
t'ibcs to oscil-
in l‘rr seen-c
tv1 piace a. bias
. t'zbrs is the us-
' * N u rodyne the
is balanced
2'5.
5 using radio
‘ With the tubes
.tlition it will
.vith nearby re-
‘2: manner td the
, . The extent of
may be somewhat
" that the radio
transformers
ual transfer of
,
3.
aces Shriek.
ency type of re-
uncomfortable to
i with the receiv-
state. The reason
.5 build up to a.
’ ‘5 very unpleasant.‘
‘ a stage or radio
- present receiver
teat deal of re-
antenna. and
..., you a receiver
-: net in operation
the more distant
' """i'r-ed in this art—
.amed the “muf~
e its use places
of the detect-
.1 and thence to
“1' words its use
he whistles and
‘ 7"adiated from the
:tive set that is
45 volts of B
’ "xi rhcostat. s. 23
‘ .nscr. a. vario-
_ posts. an ad-
baseboard a. 200
tiometer will‘ be
~ act the muffler.
a: method of add-
river is to secure
is about eight
Your present
4 the complete re-
S"::e of radio fre-
detector. The
i on a separate
in the diagramJt
In this case you
El of the same
ruzsent panel and
. ‘ , A
a. addigonal unit
.1
iv-
a .
.0005 ”f.
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Ar. A+B"
you employ a. variocoupler, vario-
meter or a. tapped coil as the tuning
unit of your set. If you use a. vario-
coupler it will be necessary to wind
{our tum around the stator as
shown in the diagram. If you are
using a. variomctcr it. will be neces-
sary to wind the wire on vertically
to avoid interfering with the move-
ment of the rotor.
If a tapped coil is used. wind four
turns on top of the winding. In some
cases it may be necessary to use
five or six turns to secure the best
results. This can be determined by
experiment. The antenna and
ground binding posts of your pres-
ent receiver (shown as connected to
the variocoupler in the drawing)
will not be used in the new hookup.
'Do not connect either filament line
to ground as is common in most
circuits.
Acts As Transformer.
The action of the turns of wire
around the primary winding of your
present tuning unit is to act as a.
radio frequency transformer to
transfer the energy from the plate
of the muffler to the grid of your
detector. Four turns will not be
sufficient in some cases and it may
be necessary to wind on six turns of
wire.
There are a few changes to make
in your present receiver. If you
have the Ultra. Audion type or re-
ceiver (yours may be. although
called by another name.) disconnect
the wire that leads from the plate
of the detector tube to the bottom
of the secondary winding or to the
aerial binding post. This makes
your receiver non~rcgeneratlve.
To secure regenerative you will
need to insert a variometer in the
plate lead of your detector. Cut
the wire that runs from the plate
of your detector tube to thé trans,-
former, Jack .or phone binding post.
Connect one end of the wire to one
side. and the other end to the other
side of the variometer.
Wit lithe ordinary type of tickler
or plate variometer feedback type
of set no changes of this nature will
be necessary.
Copyright 1924 by the S. N. L.
Technical Syndicate.
Things We Use
BEDS ‘
- Americans are returning to the
simple Egyptian ‘coucli style of bed
of three or four thousand years ago.
Like these Egyptians, the Americans
are using more beds of metal,
though of a. metal less valuable.
The Egyptian e no): was an: arti-
clc of luxury sometimes made
at ivory. gold and silver. says the
National ForeigguTrtagzecbmcu. in
tra the tray 0 , .
' 5:183 wero once for the rich and
noble only. The. ‘mojority o£_ bu-
vacuity,~ since rthc world begin. has
of honouring!)
century, that o bad;
its position as such a. necessary arti-
cle of life that the lawn! civilised
nations will not permit the selling of.
a bed for debt of 9' are. of
The man
which thdboddl. the most essential
pith aka high ”391
.m > .23 bane-tic We‘ 01 the
"3th " ' 13.191413: we“
' ' was 830.000.000.
1m lathe in-
” 131; fuss whole-
Km, ‘ ...-ar:.-,
7! IOAGG To Yoanet.
n be added to your.“
WWW]???
—’
it has only.
“filmed, .fi
“aim:
9034 annual:
upwards of four hundred million.
The simplicity of the American
bed is characteristic of the people
Who make it. The American bed is
no longer the lazy man's resting
place. A. vast amount 0: ingenuity
goes into making this bed simple. in
contrast to the old-fashioned bed of
a. sleepier time.
- In the golden age of thg bed.
three centuries ago. the bed was a
little household all to itself. with
curtains. and a small stairway lead-
ing into it. It had endless pillows,
mattresses. coverings. candlesticks,
conds and a railing to keep the dogs
out of the bed._ Sometimes under-
neath this huge. massive object.
there was a. trundle bed in which
slept the children and the servants
who were afraid of spool“ and rob-
bers.
The bed has played an astonish—
ing role in history. In its heyday.
kings, queens and the great of the
earth. received their friends in bed
and a. half dozen of their retainers
considered it a. high honor to help
them get out of bed and dress.
The first business of the day was
transacted in bed. Kings adminis-
tered justica from the bed. and in
France. for centuries preceding the
French Revolution. the king sat in
parliament in a. miniature Bed of
Justice.
The first bed of humanity was
some leaves and a. skin on an earth
en floor. It was in the hot. climate
of the Egyptians that the hammock
idea. was applied and the bed ele-
vated frdm the floor so that air
could circulate underneath.
The Roman bed was often a. piece
or stone. or cement built into the
bedroom. on which were spread
mattresses. Later the Roman bed
Empire became an object of luxury.
Whole cities. such as Corinth and
Carthage. specialized in the indus—
try’ of making beds. and the silken
and linen coverings therefor. The
richly embroidered canopies were
originally designed to keep out in-
sects and drafts of air. Solomon’s
bed was made of the cedars of Leb-
anon.
In the fifteenth century beds
were enormous in size. seven feet
long by six wide. Louis XIV. of
France, had 413 beds in different
palaces and castles. Important peo-
ple took their bed wtih them when
they traveled. The, most beautiful
beds the worldhas seen were made
or the seventeenth century.
The modern folding and metal
beds are a_ reversion to beds of
bronze‘sometlmes made in Rome,
and in Gaul. around the seventh
century. »Tbo iron bedstead came
into use in the eighteenth century.
. The possibility of having cheaper
beds. through the? importation or
wood and cotton from the American
colonies to Europe. opens up a huge
chapter in industry. By 1803 springs
were devised.7'a.ud by 1830 every bed
had its spring. nod every household
its bed. By 1840 iron bedsteads be-
come more common. and started this
great branch of the’ industry which
now reaches some fifty million dol—
lars in the United States alone.
related to foreign trade. It the bed is
of hard wood. this may mean an in-
port of mahogany. satinwood. or
rosewood. I! ' the sheets , are of
linen. that is an important. as ls'the
mattress; The steel
wool -ln the .
springs contain me“ from
South America. the paint-and the
gm: uncut
in” .
was made of wood, and during the ,
The bed you sleep in is intimately _
' MONDAY.
“'EAF—Ncw York City—£92.
4:00 p. m.—‘Alberta. Kawashima.
violinist, accompanied by Winifred
'1‘. Barr. ’
4:15 p. m.—-Mina. Kiss, soprano.
accompanied by Augusta. Lofton.
4:30 p. m.—Alberta. Kawashima.
violinist. »
4:45 p. m.e—Joel Cofley, pianist.
5:00 p. m.—\Vomen's program by
Women’s League at! the United Syn-
agogue of America. Talk by Mrs.
Rebecca M. Seligmann. Solos by
Bessie Silbcrfeld-Pitzele.
5:30 p. m.—Joel Cofficy, pianist.
5:45 p. m.—Mina. Kiss. soprano.
6:00 p. m.——Dlnner music.
7:30 p. m.—Sport talk by Thorn-
ton Fisher. 4
7:45p. m.—Mr. Francis
violinist_ accompanied by A. V. Lin:
frio.
8:00 p. m.——‘.‘Etiquctte of Gift
Giving." by Lawrence S. Mayors.
8:10 p. m.—Joint concert.
8:30 p. n1.—“The Romance of the
Cash Register," Clifford Lewis.
8:40 p. m.——Joint concert by Al-
[red Y. Cornell and artists continued.
9:30 p. m.—Music.
10:00 p. m.—.Joint
Edythe Lambertl. soprano,
Michael Lamberti. cellist.
11:00 p. m.-—Phil Baker. accor'
dion player: accordion solos and
personal interview with Nanette Rut-
ncr.
\VJZ—Ncw York City—455.
1:00 p. m. — PennsylvaniaCon-
cert Orchestra.
3:00 p. m.——Chateau Music Pro-
gram. Eddie Lee's Rainbow Orches—
tra.
3:30 p. m. -—-.Ca.thcrinc Kramer,
pianist; Elias Goldberg. pianist.
4:00 p. m.-—Eleanor Gunn's Fash-
ion Talk.
by
and
concert
4:10 p. m.—Dally menu.
4:15 p. m. —- “Housewives Wol-
come Lamb to the Fold.” John C.
Cutting.
4:30 p. m.—Tea music.
5:30 p. m.—Market reports.
7:00 p. m.—The Story Book Lady
7:29 p. m.—Flnancial develop-
ments.
7:30 p. m.—Tho Royal Trio.
8:00 p. m.—Major J. Andrew
White's guest. Jimmie Johnson.
"Sports Alliance."
8:15 p. m.--thera.ry period.
8:30 p. m.——Estey Organ recital.
9:15 p. m.-—-“Crosslng the Atlan-
tic by Air Ship——-N‘on-Stop Flight to
New York." Major William M. Hen-
slcy.
9:35 p. m. -—— Brooklyn
Opera Society in "Pinafore."
t' 10:30 p. m.—Ben Selvin's orches-
ra.
Light
“TIN—Now York City—360.-
2215 p. m.——Murial Rose. Mary
iGraham and Jackie Harrell, sing-
ng.
2:30 p. m.-—Jimmy Clarke, piano
selections.
2:45 p. m.—John Paluhl's Hawai-
ian Orchestra.
3:45 p. m.—“‘olfc Gilbert. Oscar
Taylor. Judith Roth and Al \V‘ilson.
singing.
. 4:30 p. m.-—Ilarry l-Iock’s enter-
tainers.
4:45 p. m.—Joseph C. Wolfe,
baritone. 7
5:00 p. m.—Leonard Partridge's
Orchestra.
7:30 p. m.—Joseph Fladell, barl—
tone. ‘
7:45 p. m.—Brassfleld's Orches-
tra.
8:05 p. m.—Sylvla Brown, songs.
8:15 p. m. —- Broadway Jones's
Orchestra.
8:45 p. m.—-Gertrude Eisner. so-
prano.
9:00 p. m.—Dan Gregory's Or-
chestra. ‘
9:30 p. m.—Orchcstra and enter-
tainers. ‘ '
10:00 p. rim—Orchestra. selection.
12:00 p. m. to 2:00 a. m.-—Mld;
night show.
“70R—Newark-s—405.
2:30 p. m.—-—“Housckceping and
Cooking.”
2:45 p. m.~—-—Joint recital by Ed'
May.
ward MOI‘PiS. pianist. and William
Ryder. baritone.
3:30 p. m.—Talk
Trienc Mctcalte.
3:45 p. m.—Program by Maurice
V. Samuels. -
6:15 p. m.—Frank Bailey’s
chestra.
7:20 p. m.-——Resume of the day's
sports. _
8:00 p. m.-—Reeital by Piedmont
Trio.
8:15 p. m.——-"The Economic Func-
tion at Invention." Dr. Miller Reese
Hutchinson.
8:30 p. m.—Continuation
recital by the Piedmont Trio.
8:45 p. m.-—-"I See by the Papers"
McCosker.
9:00 p. m.——"Common Sense
Music." Dr. Sigmund Spacth.
9:30 p. m.—-Sigmund Romberg in
a piano recital.
9:45 to 11:00 p. m.—-—The Craft—
man’s Club presenting “Minstrels of
1924."
“'OO—Philadclphia—509.
11:00 a. m.—Grand organ recital.
12:00 noon.-—Luncheon music.
4:45 p. m. —- Grand organ
trumpets.
by Elizabeth
9.-
or the
of
and
results and
7:30 p. m.——Sports
police reports; dinner music.
8:15 p. m.«—V\'cekly health talk,
Dr. H. A. Slreckcr.
8:30 p. lll.-—~R. C. 0. Band: Bor-
dentown Industrial School Male
Quartet.
9:10 p. m. —— Theatre orchestra
selections.
10:00 p. m.-——Grand organ recital.
10:30 p. m.—Dance program.
10:55 p. m.—Time signal.
11:02 p. m.—\\'cathcr forecast.
11:03 p. m. —— Continuation of
dance program.
“’GR—Bufl'alo, N. 33—319.
12:30 p. m.—Organ recital.
2:30 p. m. — Concert by radio
dealers.
6:30 p. m.——Vinccnt Lopez Dance
Orchestra.
7230 p. m.—-—Digest of the day's
news. '
8:30 p. m. — Address Dr.
Thomas E. Green.
by
9:00 p. m.——Muslcal program.
10:00 p. m.——Program of four
musical selections.
10:30 p. m.——-Program by Ray
Klein’s Orchestra.
11:30 p. m.-—Supper music.
\i’GY—Schcnoctady—aso.
8:15 p. m.——Address.
8:25 p. m.——Address.
8:45 p. m.—-Program by women's
chorus.
wet—Momma. lines—300. .
12:00 noon—Musical selections.
12:45 p. m.~—Markct report.
“Til—Springfield. Mass-437
0:00 p. m.-—Dinner concert.
7:00 p. m.——Baseball results.
7230 p. m.—Bcdtimc story for the
kiddies.
7:40 p. m.—-Conccrt by the WBZ
Trio.
8:30 p. m.~1Concert by All Souls
Church Choir.
11:00 11. m.-—'Surnmnry of events:
General Conference Methodist Epis-
copal Church.
KDKA—Pittsburgh—SZG.
6:30 p. m.—Dinner concert by
Howard D. “'ebb.
7:00 'p. m.—-—Baseball scores; din-
ner concert continued.
7:30 p. m.~—The children's period.
8:00 p. m.—Bascball scores: Girl
Scout. meet.
8:15 p. m. — "Political Parties."
Dr. Benpamin B. Williams.
8:00 p. m;—Concert by the'KDKA
Symphony Orchestra.
\VRC—\\'nsltlngton——409.
3:00 p. m. -— Fashion develop-
ments.
3:10 p. m.-——Song recital.
3:25 p. m.—Current topics.
3:35 p. m.—-Piano recital.
3:50 p. m.—"\Vhat “’omen Are
Doing Today." Mrs. Vi’illiam Ather-
ton Du .Puy.
4:00 p. m.—Song recital.
4:10 p. nL—Book review.
5:15 p. m.—Instructlon in inter-
national code. ~
6:00 p. m.——Stories for children.
6:20 p. m.—A talk on education.
Surplus stack of
dium, light or heavy. ‘
half price.
Special Corset Sale
Some slightly soiled from handling but all right-
to’-the-moment styles. Reliable makes, low or me-
Broken lots, of course, but every oneat least
discontinued lines
I.1VlALLETTE =
c
* WHICH IS
0R con. AND.
FIGJ
Listeners otter write in and ask
us whether it is best to use a. vario-
meter or a condenser and coil for
tuning circuits in broadcast recelv‘
ers. In to-day's article we will dis-
cuss thc relative merits of each ar-
rangement. and leave it ,to the read-
cr as to which he shall use.
From a. purely theoretical stand-
point it is desirable. in tube tuning
circuits. to have just as much in—
ductance and as little capacity as
possible. This is because the vacuum
tube is a. voltage operated: device.
\
DELIVERING CARS! .;
'BEITER—
Em
VARIOM
CONDENSER?
”v
m. 2
Inductance will tend
voltage across the grid Circuit of the
tube. and any capacity will tend to
lower this voltage. so that
not want to allaw any more
to get into the circuit than is nec-
cssary as far as getting a maximum
voltage is concerned.
This statement would seem to ar-
gue in favor of the variometcr over
but
it comes to practical application of
lhelwo systems there are other fac-
the condenser and coil.
tors which enter the case.
’1'
ROTONP01N'I" PARK
SOUTH NORWALK, CONNECTICUT. '
NOW OPEN FOR THE
"SEASON 1 924
DANCING EVERY NIGHT
.TOO BUSY ‘ " ,‘*
ERJ,
to Create
Remember, first of all.
varlometer is not a pure ' g
If it were. it wouldbc high]: ~
ab‘e. but as a. matter of fact to
quite a. lot of capacity 9
this instrument. First of all we ,
the distributed capacity bot ' ,
adjacent turns of wire on tha‘ t“
and stator windings. Then. In W
tion to this. we hood the GI .
which exists between the rotor
ing and stator winding. In order.
secure at airly wide tuning range.
is necessary to havo‘th'e rotor “,
close to the stator. 1nd this ..
hgher capacity between these W
elements than would exist 1! the,
were spaced further apart. Usualfi
however. it is not possible to
the elements very far because _
will lower the range of the 1m
ment too much. . .
Considered from a capacity fl
.point. the condenser and coil it'-
rangement is less desirable hm
we have the relatively very high ”
pacity represented by the Tidal!!!
condenser, in addition to the (ll-1113
ter capacity. by the way. can be .
greatly lowered by resorting to com.
or the various forms of low-loss with
spaced turns. ,
A disadvantage of the varlomc
is its lack of flexibility. The tuningg
range is pretty well limited. un '
we use shunt condensers. Whichz
addition to not being practical ,
yond certain limits. would dentin?
the principal advantage of the yang”;
meter—the fact that it is a tum
instrument with high inductance mg
no and comparatively little cap" 9
It is not likely that any real _ ,
ference in results will be not
whether a variometcr. or the other
tuning arrangement is used. m
choice lies mostly with the lndlfldi
ual.
a
we do
capacity
when
o ;
DUTEE WILCOX FLINT, Inc.
o
‘ P. 3.41:-
7;.WEST AVENUp, NORWALK. CONN.
t
:7
YOU Get YOUR Orda In
+~ Pr°épflyé “’6’“ Have * YOU 99 the
Rwdecoration Day: ' *
a
/
*I
Norwalk Chronicler