Evening star., 1925-05-05
DUAL RADIO OUTFIT
GOING TO ARCTIC
Macmillan Party Decides
Against Depending Upon
Single Type in Far North.

The final probI m in preparations
for the Macmillan Arctic expedition.
under the auspices Of the National
GeoSra phic Society-what 10 take in
the way of radio-was overcome late
Yesterday with decision among the
interested persons to equip the Navy
planes and the base ship with ap-
paratus that not only will insure CON
Stant communication between them
but virtually promises direct contact
between the aircraft and stations IN
the United States.
At conference participated in ny
!. l.. ReinartZ. uniNerSallr recognize"
as radio wizard and who VIII he the
wireless operator on the Arctic NeSsei
Howdoin: f.. f. Mac Donald in general
charge of radio broadcastlnG, ana
Lieut. H. {. Rodd OF the Bureau OF
Engineering, radio operator on the
NC4 on its tranSa tlantic flight, 1t
was agreed to install high-frequehcN
set and a regular Navy spark sci IN
the TWO amphihians.
Both Types on Bowdoin.
one plane will he equipped with the
NAVY standard 50e-watt spark set.
similar to the type now in use IN
planes with the fleet. Tne other
plane will carry the short-waNe set,
Each apparatus will WelSh 'oo
pounds. The FoWdoin will carry a
5.Lilnwatt tube set for high-freQuency
work and also Navy 5-kilowatt spark
set of the type installed on destroyers.
The three experts fee! that by
adjoining this method the Whereabouts
of fhe planes always will be known
TO the ships based AT Etah. Green
land. The spark set will he used Tor
constant communication while hYlns'
hut should the plane carrying TINS
continent crash. its radio could no,
operate because the electrIcal power
comes from a wind-driVen generator
end an antenna must be strung OUT
from the shin. On the other hand,
the value of the high frequency
.nuirnnd plane comes in when II Is
forced down With dead motor ana
no antenna il can operate with bat
teries more efficiently than in the ar.
because the ignition system OIL the
motor has an adverse effect on the
strength Of the signals. Then. too
It * declared. while floating IN the
water or at a sta ndstill on the snow
and ice the high frequency plane can
send out signals that undoubtedly
will be picked mp in the United states.
In the event of the discovery of land,
the waiting public would not be de
prived of the information for months
and possibly years. as in the past. but
would hear OF ii as Soon a c those
based at Etah.
Close communication with the short
wave set developed by Mr.. Reinartz
is possible even while in flight. but en-
tire dependence will be placed on the
Navy spark set. with which Lieut..
Rodd. while on the transatlantic fight.
has been heard at a distance of 500
miles.
Short.Vavp Signals Fade.
Tests were conducted at the Naval
Air Station at Anacostia. y. g.. yes
terday afternoon with aircraft and
ra dio. Lieut {. D. Palmer. radio Off
Ger of the station. few Mr. Reinartz
and Lieut.. Rodd in twin. .motored
oat-seaplane. while ReinartZ operated
a Navy spark set and communicated
with the Bellevue Naval Research
Laboratories. The signals were clear
and effective at both ends. The sea
plane came down and then Lieut..
Palmer carried Reinartz aloft in a De
Haviland radio plane equipped with
= shcrt-waVe set now being expert.
mented with by the Bellevue labora-
tories The signals at close range
were not as effective and faded out.
although it is highly possible they
were picked UP at some distance point.
as flashes from this particular set have
been in the past. This demonstrated
To Mr.. Reinartz A theory which he
had believed in.