San Antonio light. [volume] (San Antonio, Tex.) 1911-1993, 1926-01-17
'RECENODYNE 4
EASY To MAKE,
PERFORMS
Big Brother Of Browning
Drake Wins Spurs
in Tests.
By o. M. STATIC


San Antonio.
Some weeks ago The Light pub.
lished a series of Constitutional ar
!. ticles dealing with the Browning Drake
four tube receiver.
Hundreds of Browning-Drakesc click
ing off the stations nightly between
New England and Oregan prove that
San Antonio and southwest Texas
took advantage of The Lights series to
ron their own" in radio sets.
10 great was the response 10 the
articles that local parts dealers were
entirely sold out for weeks, and The
Lights small but enthusiastic coterie
{ of radio experts was run ragged and
! gray haired by fans who came in to
{ tel of their troubles or brag Of their
nightly logs.
NOT HOWJING SUCCESS.
In fact. the Browning-Drake might
he called a success-and not bowling
one either.
But behold, new king has arisen
in Egypt,
There's nothing so good 1t can't be
better, and The Light has discovered
the Browning-Drake's big brother. The
Light believes in passing a good thing
on TO its friends, and here it is.
Brother, here's a set as is set.
Formal christening exercises were
held yesterday in The Light office and
the new wonder Of the radio world
emerged bearing a name.
We called it The San Antonio
Lights Regenodyne.
You can call it anything you want.
after you build it-but you will agree
that no home is complete without one
Now for the set.
SOME SET.
Like the Browning-Drake, Il uses
four tubes. In fact, with the exception
Of the tuning coils and a few acces-
SORES, II uses the same parts which 20
into the insides Of the Browning. But
the wiring-ah, there's the colored
gentleman in the woodpile.
First: The new set is inductively
coupled. That is, there's no actual
connection between the antenna ground
circuit and the rest Of the works. And
that means-more selectivity. Broad
cast listeners who have learned to their
sorrow what havoc conductively
coupled broadcast station can wreak
in the ether, as compared with an in
duetively coupled set. can appreciate
this. Well. the thing works back
ward ss well as forward. and an in
duetively coupled receiving set is selec-
tive. Listen in on VICAR and note
how sharp the wave Is. That, brother.
lie inductiye coupling.
IT'S A REGEN0DYNE."
Second, the new Regenodyne. now
the selectivity has been obtained in
the first stage, dispenses with unnec-
essary inductive coupling in the de-
tector stage-and the radio frequency
tube and the detector are coupled to-
gether about as closely as the Siamese
twins. The plate Of Mr.. First Tube is
Joined almost directly 10 the grid of
Mr.. Second Tube. Does that mean
more volume? Try it. And no selec-
tivity lost.
Then-away with the movable tick
ler, which isn't so easy 10 tune with
and which changes the settings Of the
dials slightly each time the ticker is
adjusted. The Regenodyne employs q
fixed ticker. Regeneration is con-
trolled in a new wsy-that is by q
method which amateurs have been
using since way back before the
war" but which radio set manufac-
furers seem TO have forgotten until
just recently. We control regenera-
ton, not by moving the ticker coil.
but by controlling the amount Of cur
rent flowing through it. Simple. isn't
il? And logical. And easy TO tune
with.
Now to the sordid details.
. HERE'S THE LOW DOWN.
Wind yourself two coils on fiber
tubing-or hard rubber-or a Quaker
oats box for that matter if you can't
get anything else.
Each coil will be IN two parts
primary and secondary. The primary
coils are 10 turns Of No. y double
cotton covered, silk, or enamel-bell
wire has been used in q pinch. The
secopdaries have 4j turns-of course
you know enough about radio By this
time TO wind the coils in the same d.
rection on the forms.
Top these secondaries-thati is twist
out a little loop as you wind the coil.
to which wires can be attached later
on. The secondary Of the first. or
radio freQuency coupler is +auped AZ