F" "9 Tube Emmy Set Igzplained
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: mam cinemas-rm fig: HIE. "" ‘
- ‘ 570mm 542.?” . -aia géammmam
r 2'on 641334 am mn- (m pmm z-mm an:
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'2 J 3%! - Q a
1 m -‘ ' A?
_. {f
‘., amphfier
at .1. loudg
1.»..t: tuning
. ~ . spawn ur-
;;;:mn ntth
Tnduculg the
wt “in D0
3' or the the
mm: up in
rwzctver us—
- ware antenna
'. on the loud
‘. 51.1138 0! OD—
.zmons were
.ant at least.
azattons within
augut in easily.
4’ :3 very quiet
';.,~_- :ourth cir-
mm to lab-
. nested until
.. , i with the ac-
cantrols on the
4 vspec'tany to l
. little about
‘ sung in do“ D,
condenser can.
1 of the detqcbl'
- pottenflom
‘ mares the an!"-
lznsl exceflent re-
:wo stage- or
the push pull
ks’ EleaOoC
9:1 Rama.
‘ amplifier to your present ctrcmt.
Sonc’Apmstm L”
“'ith due apology to Mr. Cocka-
day I have omitted showing the set
or lav texaszstances across the se-
condary of the second audio tre—
quuncy transformer.
These resistances were inserted
for the purpose 0! serving and
radiating unusually loud usual:
tram toes: stations. The same re~
suits can be accompL'tstted by turn-
pmicr rheosmts. or by pluggtng m
on the first or second stage jack.
1: low ratio tmaslormers of cor-
. rec: design are used 111 the receiver
you unit and that the condensers
and grid leaks~whlch sra shown
across the pnmary and sscondana
‘bo unnecessary. ..
Their purpose Is to by pass time
o! the userul energy around the
transformer windings. an Inefficient
method at best. to automate the
possibility .0! distortion.
Each ammo: that appeared too
non-tsunami Was removed from
the circuit to tease-n the resistance
and raise the «Efficiency of the ctr-
cuit. This aiso tends to simplify
construction and tuning.
?\
3
, 33
i
a:
‘_
t
l
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in.
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7- .. 9E4]! n-Iz _.
3'90! 'C9r ‘3‘4! .__.__
mg down the detector or the am?
at the two audio transformers wul‘
% Broadcast Bill’s Radiolsys
By “TILL-t)! E. DOITGLASS
01- mm”-
Apparsnm Used.
The two condensers F1 and 3 are
twenty~three piste veruter condens-
ers. The usual fixed grid condenser
is of .Gfii‘zfu M. F. capacity. Better
resuits shit be obtained it s throt—
pLafie condenser is substituted for
the fixed condenser.
A rheostat is provided for each
tube with the excepttos or the push
pm: ampimer. where two tubes are
operated from one theostat. Turre—
szsmrme 0: your \rheostats win dc
pond on the type 0! tubes you are
gem; to use. For the UV 199 and
C 29') tubes the 4!} ohm rheostst
can be used throughout. For WD
11 and 1“: 51: ohm rheostats can be
used throughout. For a {TV zoo and
C 309 detector them ohm. and for
{IV 2914; and C Rel-A use the
twentyofive ohm rheostats. Use a
good rheostat on the detector tube.
preferabij one of the graphite or
carbon pile type.
Yew “m note that a great man!
B battery binding posts are shown.
For convenience one blodijng post
can servo in piace 0: tie it you
dostre such as Pius A and negative
30 B. 530 pm: C battery"’snd neg-
ative A. A sqrarate B battery for
the :19:th tube :3 an asset as It
promotes char mention.
i
jotting objects I! the outer and of
m m 0! tbs am M
m a: snag to pick up at
t“! ‘ w in M7 W
The can. cm m 506 I!“
mess us: both: no:- the ml
m to its tom, point. not
is not. sum tits amuse heat!
from W m to the can‘-
tu of Its expo-aim For an as-
tuna em; on!" o: a scratch:
W wire the 0!!ng mm 1'
shout two-thirds m natal amt.
wan- toran am having a 1m
hm top structure the exec:-
tmmis tow: a grater ef-
tectiu Wt tor a given mail
Wit.
not: a mm vacuum tubal
Mummmeutowhkh
the anal an be out: up by regen-
etausn :- independent of tho antes.
“haunts it all» ports at the antenna
are eqosny exposed to the mutants
. (ht amount a: 3n-
tcnmco ‘51:}: h picked up tit! he
9mm to tho height. and we
am. thcretore sums-or :0 select
a location which m permit 0! mim-
nun Wt.
Asthsmpartotthe antenna
will usually be more or tea shielded
it is am to make some com-
promiso between signal W2: and
selectifity. For Wotan in cities
I» hmt of :9 feet with s horizontal
top or the same length wilt usuafiy
be round ample tor reception of
distant m For use when tater-
:erence Ls suit: or in country dis-
tricts the height m: but increased
to 36 feet. It a of course assumed
that. to: strictly local magmas an
indoor antsnna will be used.
X: is unnecessary to use more
than one wire for any part of the
antenna and the size of this (fire is
unimportant. It should be veil tn-
sunted at the support points no be
spaced as far as posfible trek: con-
the top win it attached to s tree.
3 break mutant is placed in the
”mmmh.mum
Radio Howls ahd ' Squads? .Hamanized
r ' Into Melody With New ‘Stagcatone§
«tailspin-sauna“. natal
“Rummy!
,mamm m
Mtopmmwk‘
m.anmsmutas
vw'mmmwa
mmwmmm
mammmamm
got water mm: am this a
swim Atdgamxma
the. u this was height and lack
of selectfvtty without ceases-nth:
m signs: stream... m n
“important pom: than tho scout.
erflsklstauedmanmmda
mmammt In
this latter can the. mm W
of the man: via {map a not
around. Nmrmnamtem
dmtsthezrom . misses
{rm antenna tron d W‘
they mm rncetvsr tum
mmtedunmsspodhleusd
the roost": shook! is 4mm ss
nearasposslbtatothe point-hero
the antenna. rim enters the bathi-
m3. Th9 mum: contraction should
bemoan the antennae! the
WW. system thick its to mun
then-ommntsmensnsdm-
usemmnecttomorothum
conductor—such as the heath; and
nterornspims. '
1: your mtmmhnot fists;
the results you am: it should. took
over your autumn mutton to see
how it meets the condithaseutttned.
nutthpossihisthathyscw
mtheheigmyooanobtaInEmse-
activity Med or b! a change in
its location you can 133920?! the
strength otstgnstsmdmsnt sta-
vr‘tre wet! outside the branches. This dons.
m.
(326 Meters.)
6:15 p. m.—-rouu:rt by the Z‘ttts-
burgh Athletic Annexation Orches-
trs.
7:15 p. m.-FEIIDP¢.
7:30 p. m—Address by a. repre-
sentstivs at the Allegheny County
steam-u .anduty. ,
and Farmer Market Reports.
3:12“) p. (IL—Address by Era. Hall
Guthrie. .
3:15 p. m.——-"Mcuntain (Ilium:
in Switmrtand." by Charles Lotus.
3.36) p. m.—Co:.-ncert by the choir
of the Verona. Methodist Episcopal
Church.
9:55 p. m.-—Arhngton
3313.“ “Feather forecast.
531.". Chicago. [1]., (3“ Assess.)
5:30 a. m.-—L:tte news and com.
meat or the financial and commer-
cial markets. (This service is léosd~
time a;-
cast every ha}: hom- durfnx the
twentydour.) s
11:35 a. m.—stlo tslk by Hrs»
Anus J. Peterson.
6:30 p. tn—Ncws. financial and
tins! markets.
3:50 p, m.—-Chudren‘s bedtime
story.
“(:09 p. m.—Dinncr mesrt.
3:00 p. 311—”?! pm
9:00 p. xxx—W Roads no.
port.“
9:05 p. m.—-Program by the Us-
; ion Trust Go.
9:15 p. m.—Talk by remis—
‘ the of the Potters! M Burns.
5:0 9. m,——Talk by Comm
T. J. Johnson.
W81. m In...
(:3? him) '
too 9. m.—Dinnet moon by that
“"132 String Choir.
1&0 p. m.—Bomanoraos mus.
7:30 p. m—Bedthoo not! .or tbs
9:55 p. n—Artinzton tins #3
nah.
W08. XM‘T. I. M“ Kohl.)
::45 p. nan—M Horns in an
Ovedo‘
1:15 p. n-Bnth Cross authors-s.
3:30 p. n—“Why Nu fry It
remix?" as mum h; Gnu
Griswold. _
335 p. Isa—Mm H. BMW
mm m
6:15 1;, Ins—Rule" m Karma
too 1;. tar-1m mm. In C.”
Carrol! Chart. ham ,
P. Bopkhu. w
8:” p
:3? "
?:40 pt m.-Nstional Stockmn
ninth!
I
Chorus
his p. 3:751. Xalcoln Bird. fart-
tag, on. “Mental Telepathy «.7 m-
die.“ v
km p. m.——Jomt Dw hy C.
Gui-ox} Clark. baritone. and 0:11:
P. napkins, soprano.
9:34: p. m.——Sanphm was try
Gum—rich.
33$" p. m.——Metropontan Male
Chorus.
12::15 p. mu—‘Progrsm
music.
wnc. Washington. D. C.
a! dance
“ 1:63 Meters.)
8:0!) :9. tat—Fashion devetopmenh
o: the moment.
3:!9‘ p. [IL—SOB: Techs}.
3:25 p. m.——Report at tho Nation-
al Cameron“ Board. ‘
3:30 p. b.-—Hea1th and Beauty
talk by Grace Pours.
3:40 p. m.-—Ptano recital b! ms.
or (3231111.
3:50 p. [IL—(18m! Topics.
mm p. EL—Scn‘ recital.
420‘) p. m.—S¢£g recital.
5:15 p. m—Instrnouon in latch
national code.
8:00 p. m.——Stories for children by
Pests Anson
W32, 5. Y. 08:. «a mu
13:00 Noon—Lenten semen from
Trinity Church.
3:00 p. lam—4"" for! at: Board
01 Education 17
3:09 p. n.14:
”pun: W»
3:15 p. 39-?” Who’s Fashion
Woks thoort's
3::5 p. tsp—Concert amused by
Estozd Land.
:25 p. n.-—Women's War.
4:39 p. m.—-Tea concert by the
Hotel Commodore Orchestrs.
5:36 p. saw-Proteus: Barman H.
Home.
T290 9. saw-J‘Ldnnturss of Pour"
story by mortise smith Vgséent.
1:19 p. n—Wm
‘3:45 p. m—“ns m or the
World." . ‘
3:89 p. Isa—Danes was.
' (:39 least.)
(:00 p. m—Prodm sad stock
‘mrket quotation: net's NW
0:39 p. sue-“m m.
,_ WEI. W I...
" (no Iota-s.) -,
‘13:“ g Isa—New W wes-
ther twee-st.
5:30 p. nan-Clem: M m
42:45 9. n—M upon oi
*nu'pnu s ‘
‘ I
, _> 'I
You who's" Smith: with the
annoying so“ sad counts 9: 334b,
m them to sham“ 30‘. The
tone- at. new mosses! m-
moat. “Wed and WM fl
B. Wok. Emm- of. Radio Xe
Science and Invention and Pasties:
mesa-to: sad originator or my
nicotine dugopamm stains those
and: to produce pure musics:
tones in period tone but newt:
discs-om out any musical we that
has ever been produced before.
hit. We): says. “fire character-
mt: lama! rhtn‘ tn pitch from sun
to a note beyond the limit 0: unit»
bitmafammar to an otus. This
mm o! frequent-tea, runs much
higher than an by: obtained fruit
any known menial instrument. 1:
property controileé '- luvs a mu-
sical instrument that saw an
that mg: any other musicsl tn—
stntment. with W purity.
arsenal}: tree from Mensa.
With several vacuum tubes harmonic
chords can be developed.
“nth the slack mom who used
in the partisan:- instrument dem-
crthld hers. tomcat chimes and
pleasing to the «a; when M
axons or in connecnou with on 6:-
cm
which ms. new music. firm: a: win-a
suited.
up In audibis banknote.
will change the pitch of the
note Morality.
staccatone this methoé wss
radio.
audihts note.
In describing his new tam tron. -
tmmnhophydthatmm
m ”We: cm find nah
annulment Wests: and upm-
ttnx one of they. mm! osciflstots
widen the stun-atoms molt: ts m
it mm in m In M m
many cans (or In use By orchestras
WW than used for «lunch; for
flutewtixe nonunion. ts especially
The squads hard to suite lots are
caused twy the interferon“ of two
waves of diam-eat Wm: netting
These
wuss};- are Wait to contra} as tint
sitxhtssz chairs. or: thu enmity of
the apparatus, such as k caused by
moving the hand near tbs set. etc,
heat-
Durtng the exhaustive apartment-
inz that was hooked to develop the
foam:
impractical for tho pm so tn:
the vacuum tube was and and con-
nected to generate tow or audible
freeway notcs mum; very much
the sails as tho Mason: heard in
Smhadmnmmmm~
motawdwumtndmtm
massdisheorfluaryrafiodr—
cult and for this m a number
a! tam honeycomb cabana-u!
with mud Wmdm
ficomparathdzhxgsapaeifieaso
that tho altars! tram o?! the
manhunt; circuit “use“ slow
By sum Went amtty
and inducing: i5 tbs circuit to live
as tho tom note outrun.” we can,
with a number or switches corros—
where it makes count-ties with then
ma. Tags are brought out anti
connected to the “fish hers ss with
bu described kiss.
For the fixed condensers about
twenty mil miss condensers 9!
.G06 Kids. each an requirefi. The
“like comm: my be 9: the
ia-We type. The purpose of the
Variable madame: ts to adjust the
sum-nus to be in tune with other
mm! Want-fix. as R has been
d by experience that different
' and damn: “toes of (A)
and (B) hatter-y voltages sflghtly
change the monetary o: the gener-
ated cox-mat. interstate. mums the:
Stamtone to other Wants the
variants. condenser win be round
convenient.
The consensus are divided into
two suction: as shown; the mo?
capacitissyo! each win have to be
Wed when tuning the cacti-
htos. With an o! the condenser:-
connects! tn the circuit the note
should be the town: (testy-ed. The
switch km are connected at the
prop" inter-vats so as to éoter om
acts.“ including an halt notes. Then
by cm out the remaining fixed
mama tncresses the frequency
another octave, and with the art.
able moans-er the freqmcy can be
increased to hawibiuty.
mu: tho aid or the repmdncefi
W am! the plan view of the
finished apparatus little mm
mm he ext-edema in «amazing
and mfing’the Wanna. Fig.
31'! 4| shows how the switch keys an:
made. Everything shame! be can.
rte-cud not the taps to the com- and
ths mosses. Six binding posts
are provided. {or the (A) and (B)
battorks sue: the ioud talker. These
should be connected op and the tub-
flghtt-d to test the tit-con sod deter-
mine whether it est-mates. A “33%
howl sac-aid be heard. in the lam!
talker.
The greatest difficulty is to proper-
I! tune the osciflstor. I: a piano is
svafiabte tidal viii be a grist help,
If not. a tuning fork in conjunction
with any musics! instrument wilt do.
To best. the town: switch key.
marks! 8o. 1 in the diagram. shouts!
be connected to the end a: the lag:
coil. ms the continua-a shoafd
be named or”?! the dost: ‘ “tote Is ob.
asked. which for best result.- shook!
saw to tap the coil near th_."
rather than at the and turn.
the next key should h M
by tapping on the coil until
is obtatned.
“naming the podtion at tho “-
xt most be 633.39 by the est:
method.
m make the up, any “is
stamped together again when 3'".
the mom. as the pitch tin )- m:
cat wifh the coils separated. Eh,
mmmning tags are connect“ ‘ 3‘
same manner. so as to term It“
tare as renews: G. G fist, A. A7
tuned any musical Risotto: GI
as the type UV-Zfll. and a B W ...
he G- The variable condenser will
aid in obtaintnx the correct fre-
quency. and if not H. way be neces- jsct.
as.
R
*-
G
merchant's!!!
W
a!”
When separating tit “
plete musics} scale a! over out
B,middleC,C&sLD.DMI.
F flag G. chat. Lat. m
pissed.
Although not necessary. tho “-
ptete Lites-board can be mm “A
octave higher by cutting 6‘: ti
proper number of condensers. fi _
corms: number must be ,
by trial. By aiding mar. m
sets the mate can be shifted .8 of;
rave tower. By cutting out w 8 a.
fixed condensers an M
high'squevel can be obtained tfi
wit: “fie to mandibm é as “23%
abie condemns is decreased to “a
capacity. > ‘
:21; s six-m“ vacuum it)... ”. '
.“é
wattage at 5:} or more. tho
wifibemloaduwumflf
servant Mot-ks. 0! course. a ,7
{and takes must be used. 3%
inside use 2:: a mail room a k!
tube mayabe used with a (Bowen 3..
battery, In fact most of tho I“!!—
msms that are used in runs assh-
tng sets may be empbyed h m
Staccstone. , V,
Mr. Gemsback is new M
a. Staccafone (hit on“ be used psi-w»
fit“; at the Emma or New York W
by Dr. Hum Riesenteld. tho Vail. .
known conductor of tits m: t
symphony arches-tn of that M
in conjunction with his an ab .
chestra. it is expected {but RI ‘
will be witnessefi by my 85”?
Evading musica! directors fl hr
United State‘s. "
Mr. Gemshsck first .6! (Ii 3-
stmment on the m or hrs-it
casting the vacant deto New. Dir
Contest from “'11 New York. m‘
who ‘Eistmed tn sad has“ in
strange instrument mt: tn a fit-
ter dossription at it which ‘5 £8
purpose of this srtids on tho so):
we}? Wm
“humps!“
REGENERATth mm.
How to Tune 3 Regenerative Receiver "
Lusciomhkaewmi ,. '9
‘nuhawtdthewm
[ENG in"
mtomeamsndpkkunssts-
no relation to grit-ave m ‘
tho various sustains, m “2
the latrines -
stating. Note the stash. a. as»?
11:56:21“ (is: h M h
Norwalk Chronicler