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  INTRODUCTION
Section I. G E N E R A L
(Report of Damaged or Improper shipment
1. Scope
as prescribed in AR 700-58 (Army), Navy
Shipping Guide, Article 1850-4 (Navy), and
This manual describes Antenna Group
AFR 71-4 (Air Force).
AN/GRA-50 (fig. 1) and covers installa-
tion, maintenance, and theory of operation.
c. Preventive Maintenance Form. Pre-
pare DA Form 11-238 (fig. 8 and 9) (Maint-
enance Check List for Signal Equipment
(Sound Equipment, Radio, Direction Find-
ing, Radar, Carrier, Radiosonde and Tele-
a. Unsatisfactory Equipment Report.
vision) ), in accordance with the instruc-
(1) Fill out and forward DA Form 468
tions on the form.
(Unsatisfactory Equipment Report)
to Commanding Officer, U. S. Army
d. Parts List Form. Forward DA Form
Signal Materiel Support Agency,
2028 (Recommended Changes to DA Tech-
ATTN: SIGMS-ML, Fort Mon-
nical Manual Parts Lists or Supply Manual
mouth, N. J., as prescribed in AR
7, 8, or 9) direct to the Commanding Offi-
700-38.
cer, U. S. Army Signal Materiel Support
(2) Fill out and forward AF TO Form
Agency, ATTN: SIGMS-ML, Fort Mon-
29 (Unsatisfactory Report) to the
mouth, N. J., with comments on appendixes
Commander, Air Materiel Com-
II and III.
mand, Wright-Patterson Air Force
Base, Ohio, as prescribed in AF
e. Comments on Manual. Forward all
TO 00-35D-54.
other comments on this publication direct
to the Commanding Officer, U. S. Army
b. Report of Damaged or Improper Ship-
Signal Materiel Support Agency, ATTN:
ment. Fill out and forward DD Form 6
SIGMS-PA2d, Fort Monmouth, N. J.
Section Il. DESCRIPTION AND DATA
proper frequency range and a transmitter
power output of less than 100 watts at an
a. Purpose. Antenna Group AN/GRA-50
output impedance of approximately 50
ohms.
for the transmission and reception of radio
signals between 1.5 and 20 megacycles
4. Technical Characteristics
(mc).
Antenna type . . . . . . . Half way doublet.
b. Use. Antenna Group AN/GRA-50 is
Frequency range . . . . . 1.5 to 20 mc.
used primarily with Radio Set AN/GRC-19
Power handling
for greater range and reliability than the
capability . . . . . . . . . . 100 watts (maxi-
standard 15-foot whip antenna provides. It
mum).
can be used with any radio set that has the
Weight . . . . . . . . . . . ll.75 lb.
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