Evening star., 1924-07-29
new SHORT Waves !
GIVEN AMATEURS
Four Opened for Their Bene-
fit by Secretary Hoover's
Service Aides.
BY CARL H. BUTMAN.

Practically 15.545 amateurs will
rejoice over the news that Secre-
tary's Hoover's radio aides have
opened four new short-wave bands
for their exclusive use. Today the
nine district radio supervisors re-
ceived orders from Commissioner of
Navigation D. B. Carson. under whose
direction the radio section operates.
to. issue general and restricted ANA
teur radio station licenses permitting
the use of the wave lengths between
Is and 80 meters. 40 and 43 meters,
20 and % meters, and 4 to s meters
for pure CIV telegraphy "a hours a
day.
The owners of amateur stations
may continue to use the band between
$50 and 200 meters, employing CIV,
spark and modulated forms of trans
mission, including radio phone work,
but special amateurs lose the band
between 200 and 22o meters, which
Is now held in reserve. This class
OF amateurs, however, is granted a
new channel Between los and 10
meters in addition to the wave
lengths between 15o and 200 meters.
Statement by Omcials.
In making the announcement Gov
ernment radio officials stated that
the opening of the lower wave bands
for amateurs was due to increasing
interest in short-wave transmission.
and because the few special expert
mental stations authorized to use
these channels found it difficult to
get enough short-wave stations to
carry on satisfactory experiments
Government, in other words, hopes
additional interest will be aroused
ana that valuable scientific data may
Pc, pe secured. ecu 1t is also Pointed out
red to put new and better short
wave transmitting and receiving ap-
paratus on the market. The open
Ing of this new field to all amat teurs,
here in September, should provide
considerable data of importance to
the art and industry. and for this
reason the assignment Of these wave
lengths Is tentative only.
Text Of Department Letter.
The Departments letter reads as
follows:
All Supervisors of Radio.
Sirs:
Effective this date. you are
authorized to issue general and
restricted amateur radio station
one or all of the following bands
of short wave lengths: IS to 80
meters, 40 to 43 meters. 20 to 22
meters. 4 to meters. in addition
to the band $50 to 200 meters. pro-
vided application is made by the
owner of the station. which sta
tion must be prepared to use the
wave length or wave lengths re-
requested.
The use of continuous wave
te1a0ranhy xx-i1 he
on wave length other than $50 to
200 meters and the antenna circuit
must not be directly coupled to
the transmitting circuit.
Silent snn.fs%1. hours will l,T not be required
wave length within the above
is so situated as to produce objec-
tionable interference with other
services.
Restricted to 700 Meters. 80.
Hereafter special amateur sta
above 200 meters They may be
authorized to use the band of wave
lengths from 105 to 110 meters
In addition to the wave lengths
within the bands authorized for
general and restricted amateur use.
where the special amateurs are
engaged in conducting tests with
government or commercial sta
tionS.
General, restricted and special
amateur stations will be permitted
where the transmitting station
to use the entire band wave lengths
from $50 to 200 meters employing
pure c. W., spark and modulated
form Of transmission.
1t should be clear to the anna
teurs that the authority granted
above is necessarily tentative be-
cause Of the rapid development
taking place in radio communica-
tion, and the bands of wave lengths
authorized may be changed when
ever in the opinion of the Secre-
tary of Commerce such change is
necessary.
Respectfully,
D. B. CARSON,
Commissioner of Navigation"