Evening star., 1925-03-29
RADIO GOSSIP AND NEWS

The reliable range attained by
igh-frequency or short-wave trans
mitters, with relatively low power, at
night is reported great, and the num-
ber of such naval and commercial
stations is increasing, according TO
Capt. Ridley Mclean, director of na-
val communications. Daylight trans
oceanic communication by these sta
tions has also been reported at con-
siderable ranges, but such operation
is not used as frequently as at night,
he explained. These facts, together
with the proposal TO transmit motion
pictures by radio in the near future.
impresses Capt. Mclean with the ra-
pidity and possibilities of modern radio
development.
The Navy is working toward short
wave lengths in order to get its
service away from the crowded broad :
casting band. Considerable success
has attended the efforts of the naval
radio engineers to design and operate
low-poTer short-wave sets, especial
ly at Bellevue. d. c. From the
Los Banos radio station at Manila,
Chief Radioman Harry kidder reports
that with a high frequency receiver
he built himself he picked up A
amateur stations in the United States.
This is believed to be the first report
of short-wave reception in the Phil
ippines. His antenna consisted of a
single strand of No. 20 Dec wire
% feet long and stretched horizontally
only feet high. Radiomen at the
San Diego Radio School, In California,
have built a transmitter of 100 watt
power which transmits on 70 and so
meters. and has been heard in the
East Coast States and in Australia.
I,s
ates a high-frequency set in its rou-
tine work every night. The work of
the airship Shenandoah is we'll known
on short wave lengths. Not to be out
done by their fellows of the air, the
radiomen at Lakehurst, the home port
of the Shenandoah, have built a simi-
lar transmitter under the direction of
Gunner G.. w. Amour. This set
operates with three 50watt tubes,
and is of the master oscillator type.
In transmitting, duralumin mast 2s
feet high on the roof of the gigantic
hangar is used. To date the station
has been heard over 100 miles in day
light and 3.100 miles at night. New
Zealand, England and France have
reported this station. With ,an in
crease of power, crystal to control
the frequency and new 4o-foot mast,
improvement is expected.
An aeronautical radio set weigh
ing but 90 pounds, with a range of
$4,000 miles, is now in use at the
marine flying field, Quantico. Va. This
set sends on short wave length
varying from so to 80 meters. Mes
sages from this set were recently
received on the island of Guam, in
the western Pacific, 10000 miles west
of Quantico and $4,000 miles east.
The message WAS sent a m :
ern standard time, when greater
part of the world is in darkness to-
ward the east than toward the west
Because of the fact that radio waves
travel better in the dark than in sun
light, and as equipment OF this nature
has never been known to send 10000
miles in daytime, it Is considered GER
tain that the message travelled east
erly, by the longer but darker route
The set is operated with two so watt
vacuum tubes, and is of very COM
pact design, measuring not over 2
feet square. This long-range, light
weight radio equipment, with a very
small power input, has been developed
for use on aircraft of the Navy and
Marine Corps, field in which light
weight is a prime factor
Several commercial stations are also
using short-wave transmission sue
cessfully, and three experimental sta
tions are carrying on tests. The com
mercial stations as WGH, Tuckerton,
n. j., operating on 103 meters to
Germany; WIZ, New Brunswick, n. j.
on 43 meters, transmitting to Buenos
Aires; WON, Rocky Point, n. Y, op-
Grating on 60 meters to Europe; WIR
New Brunswick, n. j., on rs meters,
and WOO, at Rocky Point, n. Y, ex-
pected to be ready for use about
May 1.
6XI, at Bolinas, Calf. sends on 95
meters to Hawaii at night; 6XO, in
Hawaii, sends on 146 meters to Mar
shall. Calf. and new station, 1XOA,