| AT-924/SR |
|
| Physical
Dimensions |
Antenna |
| Height |
129
- 1/4 inches |
| Weight |
5.5
lbs |
|
RF
Tuner TN-334A/SRA-17 |
| Height |
9
- 1/2 inches |
| Width |
12
inches |
| Depth |
12
inches |
| Weight |
37.5
lbs |
|
RF
Tuner TN-418/SRA-17C |
| Height |
16
- 5/8 inches |
| Width |
12
inches |
| Depth |
12
inches |
| Weight |
36
lbs |
| Operating
Temperature |
-28
C to +65 C |
|
|
| Frequency
Range |
14
to 600 kHz |
| Input
Impedance |
72
ohms (tuner input) |
| VSWR |
n/a |
| Polarization |
Horizontal
or Vertical |
| RF
Power Rating |
n/a;
receive only |
| Power
Requirement |
All
power required for remote control circuitry is
supplied by control unit. |
| Feed
Type |
Unbalanced,
coaxial cable |
| Input
Connector |
(1)
TN-334A/SRA-17. - Watertight fittings for control
and coaxial cables. (2) TN-418/SRA-17C. - Type N,
UG-58A/U for coaxial cable and MS-3102R-24-20P for
control cable. |
|
|
Description:
The AT-924/SR antenna is an integral part of the TN-334A/
SRA-17C RF tuner. The antenna, tuner, and antenna control
unit C-2536/SRA-17 comprise Antenna Coupler Group
AN/SRA-17B. Antenna Coupler Group AN/SRA-17C is comprised of
AT-924B/SR antenna, TN-418/SRA-17C RF tuner and
C-6193/SRA-17 antenna control unit. The AT-924A/SR and
AT-924B/SR have equal overall dimensions and are mounted on
the same type of base insulator. The configuration and
mounting dimensions differ between the TN-334A/SRA-17 and
TN-418/SRA-17. Both tuners may be remotely controlled by
their respective control units. The antenna coupler groups
are physically small but efficient receiving antenna systems
for use on small craft where long wires are not available or
on ships where large, closely spaced antennas would
interact. These antenna groups are designed for use with any
receiving equipment tuneable over the VLF/LF frequency
spectrum. Since the tuner units form the mounting bases for
the antennas, the following specifications and requirements
cover both units.
Installation: The RF Tuner units may be mounted
vertically or horizontally. Bolt holes are provided on the
tuner housings for securing the units to suitable pads on
the ship's structure.
Considerations: To obtain maximum operating
performance the antenna should be mounted near the top of a
mast, king post, stack or other vertical member of the
superstructure. The distance between the tuner and its
associated receiver should not exceed 150 feet for
satisfactory operation. |
