Evening star., 1922-12-31
~ COMMANDER STANFORD
HOOPER,. u .. N.


Copyright. 1921
1 Having completed its popular radio:
phone broadcasting experiments. NoF
reluctantly bids farewell to its many
thousands Of friends in radio fandom.
With the completion OF its inves-
tigations the Anacostta radio labora-
tory must devote the time formerly
employed In the popular experimental
hroadcasting service to other inves.
tigations and developments In radio
Radio fans residing in nearly hall
the states Of the Union, and also in
Canada have formed long-distance
acquaintance with NOE through the
medium Of its radiated ether. or radio
waves. -.
These waves have carried the
equivalent Of the human voice con-
stituting announcements and lectures
and the equivalent OF music produc'
ed by orchestras, and, massed bands
to many thousands OF homes through
out our eastern. southern and middle
western states, and even to parts OF
CRada- - -. .-
Experiments Are Profitable.
The broadcasting experiments re-
suited in valuable information being
made available to the Navy radio e1-
perts at tho Anacostia laboratory
which could not be obtained In any
other way. while at the same time
affording pleasure and wholesome en-
tertainment to thousands Of our peo.
pie in their homes.
They were thus mutually beneficial
to the Navy radio and to the gen
eral public and without .coet to any
lone. 80.
They enabled the melodies produc-
ed by the United States Marine Band
and the Navy Yard Band to be car
ried to thousands Of people in isolat-
ed sections who otherwise could not
hope to hear these bands play.
Thousands Lead Hand.
The broadcasting of the music OF
these bands constituted unique and
almost nationwide radio experiment
Thousands of radio fans throughout
a large section Of the country par
ticipated In these experiments by SUD.
hitting reports OF results obtained al
u
| structive criticisms.
The data thus made available
| whether of a technical nature OF
! otherwise. proved of great value to
| the naval radio experts at Anacostia.
AS II is unprecedented to make indi-
| viduaI ACKNOWLEDGEMENTS. the thanks oi
| those in charge Of the work at the sta
| ton are extended through these columns
| to all who participated.
| The radio fan associates In these ex,
| periments may rest assured thai
| materially aid in the further de.
| yelopnent Of the radiophone and viii
| enable improved radio telephone
| transmit,ers to be produced for the
NoF Will cease broadcastins as Of
January g. 1928.
ArlinRton to Take Cp Task.
| The announcements and lectures o.
the various government department:
| anu bureaus hitherto broadcast throuEl
| NoF on AZ meters WIN shersa,ter s;e I o. q
! station at Arlington NAA). The neces'
! eary radiophone equipment, separate an
| tenna system and personnel are all avail
able at that station and can bs
utilized for this purpose without IN
! terfering with the normal function
| ing OF that station in its regular
traffic service and without additioaa
| expense.
| and not q radio laboratory, is> KEEP,
open for regular service DAY ans
I night throughout the entire year ase
! Navy radior.en are constantly or
| duty at this station.
i. The Anacostia laboratory, however
| Is normally kept open only ouriat
tho industrial working hours OF th'
day. Ordinarily radio messages ar
h1y no t0 hi
on the. contrary. radio investigation
and experiments are constantly De
ing conducted during the laberator!
working hours by especially Qualinet
civilian radio experts in the empio!
| Of the Navy.
Transmitting Station only.
NAA Is transmitting station only
Several radio transmitters may func
ton simultaneously into their iDdi
! yidual antenna systems at this sta
ton without interfering with on
another; provided suitable wave lengths
are used.
by land wires with the control AMI
RECEIVING station within the Nav!
Department. The Transmission OF al
radio messages from NAA is enecte'
from the Navy Department station
over these wires and through relay
I
incoming messages are received, not a
NAA, but directly at the Navy DepaSt
msnt through the receivers associated
| with their antenna located on the roo
Of tho Navy building.
The broadcaeting OF the announce
ments. and lectures will also be ef
fected over the land wires to NAA Ant
through microphones associated Wit
the radIopi.one transmitters at tina
station.
TO Meters Designated.
The use Of 4i2 meters at NAA coul.
not be satisfactorily arranged owtn1
to difficulties to be encountered from
i other antenna Systems utilizing othe
| waves at the station. It was found Z
be feasible to utilize . wave as shor
as TO meters without interference
| designated for this special broadcast
ing service.
Radio fans who. utilize all. or near
l " all, the turns of their inductances
| and the full value Of tho capacity
their condensers in their receivers q
bring in NoF on 412 meters n. VIII nm, !,
in order to tune them to Resonance
The O product Of the values Of .th'
linductance and capacity determine
the range Of wave lengths the re.
ceivers will Accommodate. One ma!
Judge from the settings on the re
| whether It can be tuned for a .wav'
length as high as 10 meters.
Tho product Of the values OF IN
l ductance and capacity. required 70
TO meters will be nearly double tina
required for 412 meters. II modihca
readily be made by increasing tn
] veiuea ~ ,he indpctance only, or, II