New-York tribune., 1922-02-26
J W ". Anrisinn Aln

- 1i4VhO OF mlho here
IN Alabama who heard kDKA on {hc
night Of the 18th with direct COUPLED
resencrativc set with only a vacuum
tube detcctor. The same night hc heard
Cincinnati and Detroit. The ncxt ni,,ht
ne heard KDKA but could not hear tho
other stations al al Why was Il on
TINS night he was able to hear moro
and much better than before or aftere
Ais reception over that distance
Was what is generally referred to i'm
radio circles IS "Freab This IS n
peculiar phenomenon which has neve,
really been satisfactorily explained
although several theories have been
advanced. The condition is very frc.
ouent throughout the entire world, bu.
Is never consistent IN any frcqucn. To-
oality. 1t is probably due to some sud.
den distortion in the ether which ner-
n'is the waves to travel in one ,oarti-
cul4r direction with greater ease dur
ING the period that the distortion cor.
tnues. L sometimes happens for 1s
stance that Station \ viii receive WI
from Station & 1000 miles away. and
b. unable to hear from Station { onl,-
200 miles away.
ne Ticker Described
c. \ s.. New York c ,g:
g. Nlat IS ,icklor, and what doe,
Il do
4. tckier is an iuductance coil.
iaductivcly coupled to the secordarv
OF the oscillation transformer and dir
cctly connected iu the plate circuit ef
your Facuun tube detcctor. Ii feeds
beck into the oscillation transformer
and thereby regencrates the incoming
signals. building thera ~ and ampiife-
ing them until thcy sro considerable
stronger chan they would be without
roeeneration
j. Il. r., AacAensack, y. j.:
Q.-Does the so-calcd ticAlcr soii
III Il regeneratvc circuit secure its re
generativc elect in cooperation with
the primary or secondary Of a vario-
coupler? A.-In cooperation With the
secondary.
@ Would YOU recommend piaciog 4
between the primary and secondary o.
outside the primary windings A..
Between primary and secondary.
Q-Assumine primary Of ralio-
coupler With taps for varying mduc-
tsnce and rotating secondary OF fixed
lnductance; is there any particular ad-
vantage gained in having variable in-
ductance tho ticker coil? A Yes.
j. gives better control.
Q. How should the inductance Of a
tickler coil compare with the induc-
tance Of the primary and secondu,,
coils? A About two thirds for the
tickler coil.
One Condenser Enough
H.-N here variable conde1scr IS
snunted across d secondary coil OF fixed
inductance would it be TO ADVANTAGE to
shunt condenser across Il Nckler coil
OF IKE dinductance ard what should
DC the relative Capacities Of these con.
densers' Would the condenser across
Cha ticker be Of more Advantage than
ono in the aerial or ground circui. in
series or vice versa? A condenser
in The ground Lead in series is su8i
cien..
Q. am Considering building q
vario-coupler where . ticker coil OF
fixed inductanco rotates JIM orc eaG Of
the primary tube to secure variable
coupling between primary ard tickler.
What do YOU think Of tie idcs, or
would At be better to have the coup
Ing fixed and VARY The inductance by
means OF tape? A. Have il fi..cd and
vary the inductancc by means Of tape.
ct is NY understanding that re
generatlVc effects may be secured bv
using yariomotera one in gid ard onc
in plate circuit. What ere Tie relative
merits Of this practice as compared 10
the use of tickler? Is { possible 10
combine the two? A.-Ihe ticker is
better than the two variometer circuit.
IL IS not possible 10 combine the tvo.
You must use either one or the other
Q.-The Only way can place an
aerial IS from NY neighbours house to
ny own. He also las a receiving radio