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` Ç Radio News for November, 1928
.`...
The Radio Constructor
f
Build a
(Continued from page 459)
Daven Television
BETTER USE PHONES
Editor, RADIO NEWS:
Receiver
I made the Loveless antenna exactly as directed,
Cn1111,1ete Essential Kit, $60.00
connected the coils as per diagram, and all I re-
THE first complete Kit. Furnished
with either T -24, T -36 or T -49
Scanning Disk, Motor, Bushing,
Rheostat, Daven Television Tube. 3
Complete Stages of Daven Television
Amplification and Instructions for
Building.
Daven Television Receiver, Complete,
including Television Tube- $too.00
Less amplifier Tubes.)
DAVEN TELEVISION
APPARATUS
Daven Television Scanning Disks
z4 T-
36 T -36;6
48 T-48
Comb. Disc with 24, 36 and 48 Aperatures T- 468...
Damn Tele. Amp. T -3
Daven Spec. Telev. Amp. T -4 for t Hi Mu Tubes and
z power Tubes 171, rio, z5o Types
Daven Telev. Neon Lamp, zo to So Milliamperes
Stricking Voltage too Plate 1 jdj'n
Daven Telev. Motor
Daven Bushing to fit X', 54 and W. Motor Shafts
Daven for 48 Aperture disc
Daven Rheostat
Daven Telev. Photo Elect. Cell 1' Bulb
Daven Telev. Photo Elect. Cell 3' Bulb
Daven Television Couplers.
at Stage No. 4ux D -4zrax
Ind Stage No. Ozu Doux
;rd Stage No. 4235 D t;az
Glastors are used for Grid and Plate resistors
1x Super Davohms in Plate and Glastors in Grid
Daven AC 71 for output tubes in series with Television
Lamp
Daven AC to (for brighter illumination)..
Daven Mu to Hi Mu Tubes for Amp. Stages
Daven Mu 6 Power Tube
Send it stamp for new Television Booklet
7.50
10.00
15.00
11.50
17.50
n.5o
1100 .
3.50
z0.00
37.50
1.15
4.6$
3.50
9.00
2.15
3.50
THE DAVEN CORPORATION
Amplification Specialists
163 'Summit Street Newark, N. J.
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Name
__J
MAGIC
Taught at Home!
New! Differenti Teaches you Big Tricks, Illusions,
Stage Stunts. Pauer and the Prinof
Marie. Learn at home. Earn 1260 to
S1'pÌes .000 a month. Write today for b fw.
SYSTEM,
Mme` SunnyR1 lde Av . 10.08
Cfleago, Illinois
Insure your copy reaching you each month. Subscribe
to RADIO NEWS -$2.50 a year. Experimenter
Publishing Co., 230 Fifth Ave., N.Y. C.
Please
ceived was dead silence. I reversed the connections
to see what would happen, and again received
nothing,
I threw off the ground connection of coil, and
immediately received very weak locals. Catching
hold of the ground and of the aerial, I found
a great increase in the strength of signals if I
squeezed the end; signals weakened if I merely
touched the end. I tried this with an old two -
tube Crosley connected to a three -tube Sonatron
amplifier. I received WOR, WENR and KFI,
stations I never had before.
I took the antenna upstairs and connected it to a
three -tube Bremer -Tully hook -up, and the result
was again dead silence. Back to the basement, and
the stations mentioned were again heard with the
Crosley.
I then tried the Loveless antenna in connection
with a Freshman lamp- socket aerial at the "ground"
end, and succeeded in rousing the whole house with
\\-h:NR's new transmission.
That ended the experiments, for wrathful noises
began to emanate from the upper regions; my wife,
who calls herself a radio widow, began a series of
interferences with home -made static which sounded
like: "Fancy having that going at 2:30 in the morning
like a locomotive!"
JAMES HATTON,
107 Ennerdale Road, Fairbank, Toronto, Can.
(Even discoverers must have some consideration
for the neighbors. The latter occasionally need
sleep. As to the Loveless antenna, variations in
the resistance of the ground connection, as well as
in the inductance and capacity of the device, are
apt to produce very different results for different
experimenters. However, like Mr. Hatton, they
may get lots of faun trying. We suggest a test
with a variable condenser across the two open ends
of the windings.)
I\NQ UIRIES for information not given
here should be sent to the constructor
direct; but he should NOT be asked to
furnish data already published, here or
elsewhere, or for instructions that an experienced
builder should not need.
This department is for free discussion to
the extent that space permits; but RADIO
NEws accepts no responsibility for the
opinions of readers as to the relative merits
of apparatus and circuits.
A HALF -GALLON ANTENNA
Editor, RADIO NEWS:
The article on Mr. Loveless' aerial caught my
eye, and I had to have one like it. Instead of
getting a large tube, I used two -quart Sealright
containers and some No. 26 D.S.C. wire. I wound
225 feet of wire on each of the tubes, both of
which are 7 inches high. The outer is 354 inches
in diameter; the inner was slit and lapped to reduce
it to 3 inches.
I have a six -tube T.R.F. set and a five -tube
Freed - Eiseman and have had fine results on both;
but lately radio reception here has been rotten and
static awful. With the aerial as described on the
T.R.P. I logged \VEAF, WJZ, WOW, WRR,
KTHS, several Chicago and Cincinnati stations,
Mexico City and Havana. The last two are almost
impossible on an outside aerial in the summer
here. When I connected the coils to my outside
aerial, my volume increased fifty per cent.
At present I am winding 300 feet of No. 26
D.S.C. on the pint -size Sealright cartons, and will
see what they will do. I have a 200 -foot outside
aerial. It is 45 feet up at the lead -in, runs north
and south 100 feet and then west to an oak tree,
where it is about 90 feet high. In the winter I
get wonderful results. I have also a sub aerial
which I use during storms.
I am anxious to see what can be done with shortwave
reception on these coils, but will have to wait
until my set is built. I.intend to experiment further
with the coil antenna.
J. M. FRANCIS,
1507 Thirteenth St., Tuscaloosa, Alabama.
(Simultaneously with the above, there arrived
letters from other readers who had no success, and
were inclined to be skeptical about the whole matter.
The uncertainty about any radio circuit is,
at least 90 %, in its aerial and ground circuit;
there is no universal prescription applicable everywhere.
One man will get excellent results with a
certain peculiar antenna; another none. In one
say you saw it in RADIO NEWS
\ \ it;ll,' / % '
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