The Washington herald., 1922-10-02
100000 RECEIVING
WIRELESS OUTFITS
In U. S.
Number Has Increased
1000 Per Cent Within
Past Six Months.

installed high-power radio sending
equipment. by means of which iso-
lated camps and farms are being
brought Into touch with the han.
penings of the outside world. Sta
tistics recently published In the
United States show that, whereas
six months ago there were less than
$4,000 receiving outfits in the whole
Of the country. and 10000 of these
within 100 miles of New York. to-
day there are at least 500. 900 of
them, and the demand continues TO
be so great that the factories can.
not cope with II.
There are well over 200 RADIO
phone broadcasting stations now in
operation in the United States, and
We can be certain that our neigh
Dor to the north Is becoming quite
as enthusiastic about radio tele-
phony as we are. In a short time
we shall be listening-in to Canadian
broadcasting stations along with
our own home stations
Phones on Planes.
At conference recently held in
France by the airway managers and
pilots in order to draw up rules to
prevent a recurrence of such an air
collision as that which took place
over Northern France recently,
among other resolutions the follow
ing were passed: That all CONNER
cial airplanes must be equipped
with radio telephones; that addi-
tional ground radio and weather
reporting stations should be estab-
lished at Polk and Noailles on the
French section of the London-Paris
airway; that the terminal air sta
tios of Crowde ad lie Bourget
should now be in constant COM
munication with each other by radio
telephone as well as by ordinary
radio; that the question of inter-
ference with radio telephony by the
powerful Eiffel Tower radio station
should now be investigated: that
the ground radio station at st.
Inglevert. on the French coast,
which was destroyed by fire recent
ly should now be replaced.
Can Teach England.
In radio. at least. Great Britain
has much to learn from US, even IL
we are a much younger country.
Until the present the British radio
amateur has been operating under
the most adverse and discouraging
circumstances. and II his numbers
have increased despite all the OBJ
stacles placed in his path, 1t Is due
to the attraction which radio holds
for so many of us. The problem
of licenses in Great Britain has be-
come very acute. Just so long as
the amateur was satisfied to re-
ceive and perhaps to send with ex-
tremely limited power, there was
no objection to his activities. But
now that the amateur is getting
more ambitious, the problem Is
getting serious.
Another thing is the lack of pub
lie broadcasting in Great Britain.
The British amateur. as well as the
clockmaker. receives his time sig
nails from Paris, Moscow, and other
centers secondhand Greenwich
time. to be sure: but since his coun-
try does not broadcast it's own off,
cial time, he must get 1t from
abroad. The British ether is filled
with dots and dashes. but practi-
cally no radiophone broadcasting.
The amateurs are now clamoring
for a central broadcasting station
like those operating in the Hague
and in Paris. and it appears that
their demands will be granted in
the very near future.
Britain's Worldwide Plans.
The publication of the report of
the commission appointed to study
the problem of worldwide radio
communication for the British En-
pire discloses a number of inter-
esting facts bearing on present-day
radio. To begin with, the commits
sion suggests that the Communica-
ton should be effected in steps of
about 1000 miles, which is con-
siderably less than the more am
bilious jumps of a few years ago.
Then the suggestion is made that
vacuum tubes be employed to gen.
crate the radio energy used in
transmitting.
The excellent results obtained
with a set of forty-eight vacuum
tube oscillators used in the Car
narvon station with an input of 100
kilowatts. which was pushed up to
$50 during the trial. are referred
to. Messages were successfully
transmitted to the United states,
India, and Australia with this ar
ranCement. 1t is stated that valve
or tube renewals will be from so to
60 per cent heavier if alternating
current is used instead of direct
current, presumably due to the use
of thermionic rectifiers.
Advise soO-Foot Masts.
with regard to wavelength, 1t
has been found by actual tests be-
tween Horsea and Egypt that the
best results over this distance can
be obtained by the use of relative
ly short waves during the night
and of a long wavelength during
the day time. 1t is recommended
that the masts be of steel, 500 feet
high. insulated not only at the
base but at intermediate points.
Counterpoises are recommended
instead of ground connections.
With regard to duplex working, it
Is recommended that each receiving
station should have a separate an
tenna and receiving apparatus for
each distant station with which 1t
may have to communicate. so as to
allow of simultaneous reception
from all. AS a temporary expedient,
it is suggested that arc generators
be used. However, these are to be
replaced as soon as possible with
tube oscillators. 1t is interesting
to note that no reference Is made