AT-1011/U
© Brooke Clarke, N6GCE
2004 - 2023
Description
This is a military antenna system
where the radiating elements are each 4 feet long and can be
combined to make a 16 or 32 foot long antenna.
Each antenna element has a female thread at the bottom and a male
thread at the top. Harris may sell this antenna as their
SB-V35F.
The base antenna element uses 1-8 threads formed into the sheet
metal.
NSN
The elements are shown in the table
in their order top to bottom
Description
|
Nomen
|
Model |
NSN
|
| Tip
element |
AT-1039/U |
120-20
|
5985-00-733-6042 |
| Second
element |
AT-1040/U |
120-2
|
5985-00-733-6043 |
| Third
element |
AT-1041/U |
120-34
|
5985-00-733-6044 |
| Forth
element |
AT-1042/U |
120-8
|
5985-00-733-6045 |
| Extension
element |
AT-1043/U |
120-14
|
5985-00-733-6046 |
Flange
Basse
|
SC-C160410 |
120-28
|
5985-00-733-6047 |
Bag
|
8
elements
|
120-58
|
5985-01-475-2367 |
Guy
Rope Kit
|
1 level
|
120-59 |
na
|
Ground
Radial Kit
|
na
|
120-47
|
5985-01-397-6971
|
| Ground
Stake Kit |
na
|
120-48 |
na
|
Spring
Base
|
AB-1335/G |
4245 |
5985-00-267-2752 |
| Adapter |
NVIS
Tilt Whip |
4282 |
5985-01-422-8525 |
Bracket
|
Shelter
Mounting |
4240-30 |
5985-01-514-4515 |
Sugar
Scoop Bracket
|
SCD-189023 |
4257 |
5985-01-514-4396 |
Transportable
Ant Kit
|
32'
|
120-60
|
5985-01-453-4775 |
Stationary
Ant
Kit 32'
|
AT-1011(U) |
120-55
|
5985-00-846-6442 |
| Eye
Protector |
na
|
4291-1
|
na
|
HV
Protection Kit
|
na
|
120-HVPDR |
na
|
Hints & Tips
Connection
This is a whip antenna that does not have any 50 Ohm matching
circuits. It needs to be fed with a short high voltage
wire from the antenna terminal.
Do not use a coax cable since that will add capacity which may
confuse the antenna tuner.
 |
For example the cable used on the GRC-193
Conn:
SM-C-S029 I 2
Cable:
CX-10171/U |
Cleaning
Use Scotchbrite to clean all the male antenna element
threads. No lubrication is needed on the mating
threads.
During this process I found that the metal forming the
male thread on one of the base antenna elements had a couple of
hairline cracks about 180 degrees apart. The hairline
crack is not a problem.
Installation of 32' Antenna
Start with the 4245 spring base
firmly attached to a vehicle or structure.
- Screw on one of the bottom antenna elements
- Pull out pin from 4245 spring base and pull up on antenna
section. Then turn and push in pin lock in
place. The spring will now be able to flex.
- Install the lowest antenna section to be used.
- While pulling bottom antenna section over walk away while
attaching each section one at a time by screwing each
section on the prior section.
- After all sections are screwed together in a horizontal
position, walk the antenna up. The spring will assist
in pulling the antenna up. When vertical, lift up on
bottom antenna element while pulling and turning the lock
pin out, then lower the antenna.
- Lock the pin by turning it and allowing it to go in.
Take Down
Reverse the above steps.
This means unlock the base so the spring is flexible and bend
the antenna over and start taking it apart at the tip end,
working back to the base.
Mounting
SCD-189023 Sugar
Scoop aka Shakespeare 4257
The plan is to mount the bracket on a pipe or fence post in the
ground, install an elevated radial system and use this antenna
with the SGC antenna coupler.
Standard 2" muffler "U" bolts have the correct center to center
distance, but the sugar scoop holes needs to be slightly
enlarged. A 5/16 Drill is a good choice. Since the
4245 Antenna base does not protrude down into the sugar scoop 3
"U" bolts can be used and the supporting pipe can be on the
inside of the bracket. The 4 holes in the top of the sugar
scoop are 7/16" diameter and are the standard military antenna
base hole pattern.
I was going to do this with the Light Weight Beacon antenna, but it
did not survive winter winds.
Tilt Whip Adapter
The bottom tube has no internal
threads, it just slips over the base. This way the antenna
can be rotated freely then the clamp locks the rotation.
Typically for radio operation the antenna would point to the back,
but for driving on the street the antenna would point to the front
and be tied down. Weight 6 pounds. Extremely
strong construction.
Military Antenna
Tripod
Marking:
67032 ASSY
03-2735119-1
MFR 53892
When the legs are retracted the overall length is about 33".
When the legs are folded out and with the lock pins are holding
them in both directions the height from the top to ground is about
24" and the holes in the shoe plates are about 46" center to
center. The top plate is 6" diameter and has three holes on
a 4.5" diameter bolt circle with 90 degrees between them.
The center hole is a little less than 3.5" I.D. The shoe
plates are 4 x 4.15" with a through hole a few thousandths smaller
than 1/2"
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[an error occurred while processing this directive]page created 14 Apr. 2004
