Evening star., 1927-11-17
WAVE ALLEGATION
PLAN IS LAUDED
Radio Conference Hopes to
Solve International Prob
lem While Here.
B. the Associated Press.

a. NA0SS~-NN~~
The ALLEGATION of wave length to the
various radio services worked out BY
the Interna tional Radio Conference
will assure the present parley a place
IN the history of wireless utilization
In the opinion Of many delegates.
They believe that the plan evolved
has the double advantage OF Il rlsirlS
conhnins lons-wave services 10 sep,
erate frequency hands, thus avoidlng
tl,e irterference which has rendered
lang.wave communications so di1ncul'
IN late wears. and of subJectlng the
shorr waves to a looser allocatlon IN IN
which their uses are not SO cioHTiS
Sofned such a policy was deslrdple
thev say. because the utlilZdtloh VI
short waves is still in an eXpeflfnentai a, /,
stage. while that Of long waves Is wen
understood. .: +be
The chief problem confronting lhe
conference was how TO satisLs III
needs and demands or proaocas'eis
and amateurs.
Amateurs Demand Freedom.
First efforts at convincing European
countries Of the advisability or chahs-
ing their broadcasting frequencles SO
as TO keep them within certain wen
defined brackets, leaving ample scope
~ the further development of snip
xrireless communication, up TO tneh
grievously hampered by broadcastlns
ercroachments, met with SUN oppo-
eitiOn. >
Amateurs of the whole world de-
manded that they be in no way re-
stricted from pursuing their experl-
tnG1r
rnunications with short waves. Wnlie
fhe United States. Canada and Great
Britain were. on the whole, very sym
pathetics with the amateurs desires
most foreign countries adopted nos
tile attitude.
Frank exchange Of views soon
brought out complete agreement on
both poi-ts. AS now arranged, broao
casting VS. be restricted to the ire
ouencies retween 1875 and l,o5o
meters and between 545 ana Z5o
meters wave length. In addition. 10
allow European broadcasters now op-
Grating on other frequencles to change
their wave lengths without undue
hardships. it was agreed to permit
hroadcasting on frequencies between
$50 and 1910 meters wave length for
a period of one year after the ratiflca-
fion of the convention. Broadcasters
also were allotted numerous narrow
bands in the short-wave category Tor
long distance operation.
- Allegations .Are Given.
-Amateors were allotted several mar.
row. wave .bands evenly. distributed
over the. short-wave .categories.
The allocation~to' services between
fxedt Land stations = point-to-point
tbrisrmobjle services; including ship
ndf ~asrcrsft' communications - is
re1shly Fasts follows in meter wave
!: spnnt .tolpoint-so. 900 to 5000; with
14Sn drEow bands. evenly distributed
soverstlFe short wave range hstween
IT'S and II meters: mobile--2,725. to
1875, $50 to 545; 200, to It's with IL
narrow bands evenly distributed
over the narrow wave-length category
In addition wave lengths We're re-
served for radio heacons. distress
calls, weather reports and for the ex-
change Of information used for the
detection and arrest of criminals.
The wave bands measured in meter
wave lengths allotted to amateurs are:
IFS to $50, IS to IS, 42.S to Al, 21.4 to
20s. 1o.7 to 10. 5.35 to 5.
In addition to the exclusive use or
these brackets the convention allowed
amateurs to correspond Internally
provided the internal legislation If the
corresponding countries allowed such
practice.
The amateur wave bands were dis
trihuted over the whole short-WaVe
range so as TO insure that amateurs
would be able to carry out their expert
ments at all hours of the day. Neces-
sity of various wave bands Tor this
purpose was dictated by the fact that
short waves are influenced by seasonal
and hourly coefficients in their carry
Ing capacity.