The Electrical experimenter
The Electrical experimenter
The Electrical experimenter
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May, 1917 THE ELECTRICAL EXPERIMENTER 45<br />
Our Amateur Radio Station Contest is o|,eii to all readers, whetlicr subscribers or not. <strong>The</strong> photos are judged for best arrangement and efficicncv<br />
•.utvictn.y<br />
of the? an[>aratus. aiM.aratu.s. To increase the interest of this this denanmeiit department we we mak-p make it a ml,. n„. .,. ,..,l,i;^l. ..u„,„.: ,.f c.„,;—.- ;_.i i .. .... ^ ,<br />
rule not to publish photos of stations'unaccompanied' by ihaT'oTthe "owneT'^Dart<br />
photos l^referrcd lo licht toned one,. W e pay each month $3.00 prize for the best photo. .Make your description brief and use only one side of the sheet<br />
.\ddress the Kditor, \\<br />
' =*i*;tiith<br />
the .Amateurs Dept.<br />
AMATEUR RADIO STATION<br />
CONTEST.<br />
Monthly Prize, $3.00.<br />
This month's prize-winner.<br />
RADIO STATION OF FRED DIETZ,<br />
PHILADELPHIA, PA.<br />
I present licrc- a llashlJKlit plioto of my<br />
station. <strong>The</strong> aerial is forty feet high, one<br />
hundred feet long, compo.sed of three wires<br />
spaced six feet apart.<br />
Long Wave Radio Station of This Month's<br />
Prize Winner— Mr. Fred Dietz. of Philadelphia,<br />
Pa. He Hears the German Stations<br />
and Many Others.<br />
<strong>The</strong> sending set consists of a Ijj inch<br />
Manhattan spark coil, Murdock sending<br />
condenser, spark gap and key. I also have<br />
a six volt storage battery, and can send<br />
fifteen miles.<br />
<strong>The</strong> receiving set consists of two loose<br />
couplers, one tunes up to two thousand meters<br />
and the otlier to three thousand meters.<br />
<strong>The</strong> small loose coupler is used with a crys-<br />
tal detector. Tlie large loose coupler is<br />
used on the .\udion and Audio-tron. I use<br />
three Bunnell variable condensers, three<br />
loading coils and a pair of Murdock<br />
'phones.<br />
(l)arien,<br />
I can beat; GUI, POZ, XB.\<br />
Panama), X.\T (\ew Orleans),<br />
\'.\R ( Key West I ; and a great many other<br />
land and ship stations on undamped waves.<br />
I can hear as far as Key West on a crystal<br />
detector. My call number is 3G.\.<br />
Philadelphia, Pa. FRED DIETZ.<br />
THE FIRST "RADIO" MESSAGES.<br />
At the battle of Isbtib a Bulgarian cowherd<br />
signaled news to his military countryincn<br />
relative to the position of the Serbian<br />
battalions by moving live cows about<br />
in various ways on the top of a hill.<br />
<strong>The</strong> Rasntos. by the way, practically anticipated<br />
"wireless telegraphy" in a crude<br />
fashion. That is, by striking Iieavily on a<br />
huge drum of goat skin, which is placed<br />
on a special spot, another liasuto at a distance<br />
can gather tlie purport of the message<br />
by placing his ear close to the ground<br />
to catch the vibrations, and he in turn<br />
passes the message on.<br />
Of course, given suitable climatic conditions,<br />
the military heliograph can transmit<br />
messages over enormous tracts