The Electrical experimenter
The Electrical experimenter
The Electrical experimenter
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64 THE ELECTRICAL EXPERIMENTER May, 1917<br />
A Motor and a Rotor for $5.25<br />
We have built 5000 of these outfits, consisting of a motor<br />
that will operate on a. c. or d. c, 5000 to 6000 r. p. m., 100<br />
to 130 volts.<br />
An aluminum rotor, perfectly<br />
balanced, machined<br />
and insulated.<br />
<strong>The</strong> MarV-o' Quality<br />
One-half actual size<br />
IS a storage<br />
battery.<br />
^s^<br />
Regular price of<br />
these outfits, $8.50<br />
Introductory offer<br />
as above, while<br />
they last. Act<br />
quick.<br />
$4.00<br />
Motor only<br />
$1.50<br />
Rotor only<br />
When ordering rotors give size of shaft<br />
<strong>The</strong> Fosco Corporation<br />
1355 N. Western Ave., Chicago, 111.<br />
Send postage jor catalogue oj motors and supplies<br />
An Opportunity for Experimenters<br />
to secure a GOOD storage battery at<br />
a moderately LOW cost. <strong>The</strong><br />
ONE article you cannoc<br />
afford to experi<br />
ment with ^^— /^i:o^ e'ttt<br />
>cO .-xo^.<br />
Typo<br />
4C2<br />
6C2<br />
6C4<br />
6C6<br />
MARKO<br />
storage batteries are especially<br />
adapted for op>eration of<br />
kinds of spark coils, insuring a heavy<br />
and powerful spark. <strong>The</strong>re is nothing superior<br />
FOR AUDION USE<br />
VoltB Amp. H.R List Special price to<br />
Capacity Price wireless eneineers<br />
4 40 $ 7.00 S4.90<br />
6 40 10.00 7.00<br />
6 60 12.00 8.40<br />
6 80 16.00 11.20<br />
PAUL M. MARKO & CO^ Inc^ 1191 Bedford Atc. Brooklyn. N.Y. N. Y. Depot—974 8lh Ave.. N.Y.City<br />
New Indamped Wave Coupler No. 749<br />
special latrodnctory Price, $18.00<br />
Our new coupler No. 749 is 32' long, 9' wide, and<br />
10' high, over ail. and on an average-sized Antenna<br />
tunes to 15,000 meters. This coupler, used with the<br />
new CHAMBERS' SYSTEM or CIR-<br />
CUIT, will bringin signalsfrom domestic<br />
and foreign Arc Stations surprisingly<br />
loud and clear. Note the difference In<br />
size of our No. 748 and No. 749.<br />
We claim to be the original inventors of<br />
a SYSTEM or CIRCUIT for the reception<br />
of the undamped waves without the<br />
use of Loading Coils or Oscillating Colls,<br />
as thev are sometimes called; as with our<br />
SYSTEM or CIRCUIT only two Inductively<br />
Coupled Coils are neceBBary. Circuit supplied<br />
This ^HAMb1;RS' circuit saves you money.<br />
II. IS lo pay for. and price of coupler only SlS.Oti Place order<br />
the introductory price. Orders filled in rotation. Send for<br />
B. CHAMBERS & CO., 2046 Arch St., Phila., Pa.<br />
*• THERE'S MONEY IN IT**<br />
i^g^iLEARNTELEGRAPHY^sSfil^<br />
LRN TELEGRA<br />
„^niMORSE AND WIRELESS:<br />
TEACH YOURSELF<br />
in half the usual time, at trifling cost, with the<br />
wonderful Automatic Transmitter. THE OMNIGRAPH.<br />
Sends unlimited Morse or Continental niessa,t;es. at<br />
any speed, just as an expert operator woiil i.<br />
Adopted by U. S. Gov't. 4 styles. Catalogue free.<br />
OMNIGRAPH MFG. CO.<br />
39L Cortlandt St. New York<br />
You benefit by mentioning "<strong>The</strong> <strong>Electrical</strong> Experimenter" when writing to advertisers.<br />
L.<br />
J.<br />
W<br />
G.<br />
L.<br />
L.<br />
P.<br />
J.<br />
S.<br />
R.<br />
E.<br />
L.<br />
H.<br />
R.<br />
E.<br />
H.<br />
H. Williams, 4 CY, Covington<br />
R. Shumate, 4 EC, Tomasville<br />
. B. Pope, 4 A.A., .Athens<br />
IXDIAX.A..<br />
Decker, 9 QXO, Ligonier<br />
B. Wilco.x, 9 KH, .Angola<br />
Gehring, 9 .\.AS, Bluffton<br />
K. Romey, 9 QR, Columbia City<br />
E. Williams, jW, La Grange<br />
ILLIXOIS,<br />
W. Pierson, 9 PY, Carrolton<br />
H. G. Mathews, 9 ZX, Chicago<br />
E. Boynton, 9 ARA, Sycamore<br />
.•\. Kern, 9 GY, Matoon<br />
Klaus, HK, Eureka<br />
W. Beard, 9 GK, Pleasant Plains<br />
H. Giddings, 9 MK, Lanark<br />
A. Mackley, 9 AIM, Peoria<br />
IOWA.<br />
W. E. Slauson, 9 AMI, Monticello<br />
H. O. -Ainsworth, 9 AMI. Monticello<br />
S. U. of Iowa, 9 Y.A, Iowa City<br />
Don Bailey, 9 RD, Clinton<br />
Lester Fawcett, 9 .AIF, Independence<br />
C. Tumwall, CT, Ottumwa<br />
W. Harper. WH, Ottumwa<br />
H. M. Ennis. H./IE, Ottumwa<br />
Kent Bros., 9 .ARE, De Witt<br />
"<strong>The</strong> Old War Horse," 9 RD, Clinton<br />
KAXSAS<br />
W. S. Ezell, 9 YE, Wichita<br />
Karl Keller, 9 ADE, Kinsley<br />
LOUISIAX.A.<br />
P. E. Grenlaw, 5 BB, Franklinton<br />
MASSACHUSETTS.<br />
R. T. St. James, I IZ, Great Harrington<br />
P. C. Smith. Haverhill<br />
E. B. George. 1 .AX.A, Framingham<br />
B. H. Moran, 1 AAM, Natick<br />
MIXXESOT.A.<br />
Peter Hansen, PH, Chisolm<br />
MICHIGAX.<br />
T. L. Munger, LM. Sturgis<br />
"W. Benson, 8 .AXR, Battle Creek<br />
Ed. Holbv, 9 OE, Marquette<br />
Y.M.C.A.; 8 QJ, Ann Arbor<br />
-M. B. Rann, 8 .ADR, Lansing<br />
W. Koivanen, WK, Chisolm<br />
D. G. Carter, 8 WR, Grosse Point<br />
MISSOURI.<br />
W. Corwin. 9 .ABD, Jefferson City<br />
Washington University. 9 XV, St. Louis<br />
H. Longmire. Monroe City<br />
B. Emerson, Monroe City<br />
M.ARYLAXD.<br />
C. E. King. 3 SV, Baltimore<br />
E. B. Duvall, 3 .AK, Baltimore<br />
A. P. Smith. 3 .AK. Baltimore<br />
L. W. Passano, Marconi Operator, M. &<br />
M. Co., Baltimore<br />
MOXTAX.A.<br />
.A. C. Campbell. 7 ZC, Lewiston<br />
XEBRASKA.<br />
Bradford Telepea. Xo Call, Tekomah<br />
XEW YORK.<br />
J. X. Simpson, 8 CM, Rochester<br />
W. C. Ballard, 8 XU, Ithaca<br />
Genesee Radio Station. 8 OZ. Rochester<br />
Dr. H. E, Fitch, 8 ZE, Elmira<br />
O. W. Saxton, 8 FY, Buffalo<br />
A. C. Young. 8 .ARB, Buffalo<br />
H. Blower, 2 HB, Brooklyn<br />
Kenneth Briggs. 8 MG. Rochester<br />
T. Weiss. 2 FH, Port Washington<br />
G. M. Benas, 8 QC. Utica<br />
W. J. Vickery. 8 SE, Gloversvillc<br />
J. K. Hewitt, 2 .AGJ, .Albany<br />
XORTH CAROLIXA.<br />
W. S. Rothrock, 4 DI, Winston Salem<br />
J. T. Moorehead, JM, Greensboro<br />
OHIO.<br />
Fred Travis, Defiance<br />
R. Hoffman, Defiance<br />
D. Israel, 8 .AXC, Cincinnati<br />
G. D. Ilowsare. 8 .ASG. Eaton<br />
{<strong>The</strong> balance will be publisht in the June issue.)