Arrow Antenna OSJ VHF/Marine User manual

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911 E. Fox Farm Rd. #2
Cheyenne, WY 82007
ArrowAntennas.com
Simply the Best
[phone]
[email protected]
The OSJ VHF/Marine does NOT require a ground plane.
Ideal for mounting:
•In an attic
•On a roof vent pipe
•On a wooden (or Metal) pole
•On Fiberglass or Plastic Vehicles
(Motorhomes, Trucks, Boats)
Mount it just about anywhere.
SO-239 Feed Connector
Covers 152 - 162 MHz with a VSWR of less than 1.5:1.
Omni-Directional
The OSJ is a Heavy Duty Antenna. The elements are made
from 3/8” solid aluminum with a heavy duty angle mounting
bracket.
Nothing to tune. Nothing to adjust.
Covers 150 – 162 MHz.
Model
OSJ VHF & Marine
Open Stub J-Pole
Guarantee
No hassle refund
If you are not completely satisfied with
any ARROW ANTENNA Product it
can be returned for a FULL refund less
shipping and handling within 90 DAYS
of purchase date.
SIMPLY THE BEST
We don’t invent antennas.
We simply build them better.
54”
18”
5”

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Part # Price Model OSJ VHF/Marine Parts List
OSJ01 $14 3/8" X 54" Driven Element with Coupling Nut
OSJ02 $12 3/8" X 18" Element with 2 Stainless Jam Nuts.
OSJ03 $20 3/16" X 1 1/2" X 1 1/2" X 5" Assembly Bracket
52S206 $4 Saddle Clamp for mounting to Mast up to 1 1/2" - (2 for $4.)
J14605 $4 SO-239 - 3/8-24 Antenna Mount
J14606 $1 Nylon Shoulder Washer for Antenna Mount above - (2 for $1.)
25C275 $1 2 3/4" Bolt, Nut & Lock Washer (all Stainless)
(Please add $8.00 S & H per order. Thank you.)
Assembly Instructions
1. Attach the 54” element to the Assembly / Mounting Bracket as
shown in the picture on the left. Place nylon shoulder washer
on top of bracket as shown with shoulder down down.
2. Tighten with a 9/16” & 3/4" wrench.
Caution: Do NOT over tighten. About 30 ft./lb. Max.
Coupling Nut
Nylon Shoulder Washer
SO-239 Stud
3. Remove one nut from the 18” element.
4. Screw 54” element into Assembly / Mounting Bracket in
treaded 3/8” hole nearest end of Bracket.
5. Replace second nut and tighten with 9/16” wrench.
Put a small amount
of grease on threads
before assembly.

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SWR Chart
of
Model OSJ VHF/Marine
½” 3/8” Threaded
18”
54”
1 ½” x 1 ½” x 5” Assembly / Mounting Bracket
4”
Saddle Clamp
1 ½”
Mast

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SWR
SWR is basically a way of testing the impedance of your Antenna System. The Antenna System has two parts.
1. Coax and connectors.
2. Antenna.
Before you can test or tune the Antenna, you have to test the other half of the system first, the Coax &
Connectors.
Brand New Coax can be Defective or Damaged.
To test the Coax you will need a 50 ohm Dummy Load and an SWR Meter or Antenna Analyzer.
Note: Some of the MFJ 269 Analyzers don’t work right. - - (eHam reviews on the MFJ269) - - The MJF 259B
works Great.
Connect the Dummy Load to the end of the coax instead of the Antenna. Connect SWR Meter or Antenna
Analyzer to the other end of the coax.
Check the SWR on all frequencies. SWR should be 1.0:1 on all frequencies. If the SWR is not 1.0:1 or if the
SWR varies with frequency, then the Coax is Not up to the task.
Important: Some Coax can test fine on VHF but not at UHF.
Also a known problem with some remote Antenna Switches.
Example from eHam Reviews
I have had my MFJ269 for about 5 years. It works ok. On VHF and HF it is dead on. But on UHF I do not trust
it. I also have a Bird and I compared several antennas tuned with the MFJ269 and the Bird and the MFJ269 was
wrong everytime on the UHF side. I killed one UHF final when I relied on the MFJ269 for tuning. This antenna
was checked with the Bird after the finals died and was found to have an SWR of 5:1+. Yet when checked with
the MFJ269 it showed fine. I now use the Bird for everything but HF tuning. The MFJ269 still seems to work
ok in this range and is nice for tuning my Buddy Pole for portable ops. It will never see VHF or UHF antennas
again.

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CHECKLIST FOR OUR SHIPPING DEPARTMENT
OSJ VHF/Marine
___3/8" x 54" Driven Element with Coupling Nut
___3/8" x 18" Element with 2 Stainless Jam Nuts.
___3/16" x 1 1/2" x 1 1/2" x 5" Assembly Bracket
___Saddle Clamp
___SO-239 Stud & Nylon Shoulder Washer
___2 @ 2 3/4" Bolts, Nuts & Lock Washers for saddle