Stryker SR-955HPC User Manual

INTRODUCTION

Congratulations on your purchase of a Stryker 10 meter mobile amateur transceiver.Your Stryker is designed to provide
years of enjoyment and trouble-free service. There are many features and functions designed into this transceiver. To ensure
that your investment is enjoyed to its fullest extent, please take a few moments and thoroughly read this manual.

LIMITED WARRANTY

Stryker Amateur Radio warrants this product to be free of defects for a period of three (3) year from the original date of
purchase. You must activate your warranty by completing the included form or online at www.strykerradios.com/register.
aspx This warranty is non-transferable. This limited warranty is subject to repair or replacement of defective components only.
This warranty is void if the radio has been tampered with or misused. If your Stryker Radios needs repair any time during the (3)
year warranty period please visit our website: www.StrykerRadios.com to obtain an RA number or call 910-221-1086 between
the hours of 10 a.m. – 5 p.m. Eastern standard time. If you do need service after your warranty has expired you can still send

your radio to us for repair. Our rates are very reasonable and you can rest assured that your radio will be xed correctly.

IMPORTANT: RETAIN YOUR SALES RECEIPT

You will need to include a copy of your original sales receipt along with your radio when sending it in for warranty repair.

1

INSTALLATION

1. Contents

Unpa ck and inspec t y our Stry ker SR-9 55H PC for missi ng or

damaged Components.

Quantity Description

1 Stryker SR-955HPC Transceiver

1 Microphone

1 DC Power Cord with Inline Fuse

1 Mounting Bracket with Hardware

1 Microphone Hanger with Hardware Set

1 USB Programming Cable

Location

Plan the locat io n of the transceive r and microphone brack et s
before starting the installation. Select a location that is convenient for
operation and does not interfere with the driver or passengers in the
vehicle. In automobiles, the transceiver is usually mounted below the
dash panel, with the microphone bracket beside it.

Mounting

Your mobile radio is supplied with a universal mounting bracket.
When mounting the bracket and radio to your car, make sure it is
mechanically strong. Also provide a good electrical connection to the
chassis of the vehicle. Proceed as follows to mount the transceiver:

Mount the Transceiver

After you have determined the most convenient location in your
vehicle, hold the mobile radio with the mounting bracket in the exact
location desired. If nothing will Interfere with mounting it in the desired
position, remove the thumbscrews and use the mounting bracket as
a template to mark the holes for the mounting screws. Before drilling
the holes, make sure nothing behind the surface will be damaged or
interfere with the installation.

Electrical Connections

The Stryker SR955 is designed to work on any 13.8 volt DC, negative
ground electrical source. The condition of a vehicle’s electrical system
can have a profound affect on the performance of the radio. A low
battery, worn generator/alternator, or poor voltage regulator will seriously
impair the performance of the transceiver. Any of the above conditions
could result in a high level of receiver noise generation or a Substantial
loss of the transmitter’s RF output. Make sure that all these components
on your vehicle’s electrical system are in good condition prior to installing
the transceiver.

Before making any electrical connections make sure the volume (VOL)

1.

control is in the“OFF” position.
Connect the positive (+) red wire of the DC power cord to a positive

2.

13.8-volt source at the vehicle fuse block. If connecting to the fuse
block, it is recommended that a switched power source be used so
that the power to the Transceiver is disconnected when the vehicle is
off. This eliminates the possibility the transceiver draining the vehicle’s
battery.
Connect the negative (-) black wire to a metal part of the vehicle’s

3.

fra me, or chassis ground. Make sure that this is a good ground
connection.

Antenna Connections

The Stryker SR-955 has a jack in the rear for a standard PL-259
antenna plug. If you are looking for the most range for your transmission,
use a vertically polarized, quarter-wave length antenna. If antenna height
is a problem, you may use a shorter, loaded-type whip antenna although
you can expect some loss of transmission range. Your antenna should
always be adjusted for the lowest possible SWR (1.5 or less.) To adjust
your antenna for best performance, you can take advantage of your
radio’s built in SWR meter. Failure to properly adjust your antenna(s)
will diminish your operational range and could result in damage to your
radio. Damage that results from operating with high SWRs is not covered
under your factory warranty!

2

Tuning the Antenna for Optimum SWR

Beca use su ch a wid e v ari ety of base an d mobi le anten nas are
available, this section will concern itself only with the usual types of
mobile adjustable antennas.

Antenna length is directly related to signal frequency. Therefore, it must
be tuned to resonate optimally throughout the frequency range of the
transceiver.

Lower frequencies require a longer antenna than higher frequencies.

Due to the various methods of adjusting antennas for proper SWR, we
have chosen what we think is the optimum method:

A. Antennas with adjustable screws (setscrews).

Start with the antenna extended and tighten the setscrew lightly

1.

enough so that the antenna can be lightly tapped with your nger for

easy adjustment.
Set your Stryker radio to your desired operating frequency or the

2.

center of the range of frequencies you plan to use. Press the PTT
(Press-To-Talk) switch, and tap the antenna (making it shorter).
The SWR meter will show a lower reading each time the antenna
is tapped. By continuing to shorten the antenna, you will notice the
SWR reading will reach a low point and then start rising again.
This means that you have passed the optimum point for the middle
frequency.

Extend the antenna a short distance and again follow the procedure

3.

above.
When the lowest point has been reached, switch to the lowest

4.

frequency you plan to operate on and then to the highest a nd
compare SWR readings. They should be almost equal.

B. Antennas that must be cut to proper length.

Follow the procedure as in A above, but adjust the length by cutting

1.

in 1∕8" increments until a good match is obtained.

Be very careful not to cut too much off the antenna at one time.

2.

Once it is cut, it can no longer be lengthened.
The whip is easily cut by filing a notch all the way around, then

3.

breaking the piece off with pliers.

NOTE:

The proper setting is achieved when the SWR is 1.5 or below and when it has
the same reading for the low and high frequencies in the range you plan to use.

External Speaker

The exter nal spea ker jack (EXT ) o n t he rear panel is used for
remote receiver monitoring. The external speaker should have 8 ohms
impedance and be able to handle at least four watts. When the external
speaker is plugged in, the internal speaker is disabled.

Programming Jack

Using this jack and the supplied USB preprogramming cable you
can change many of the default options that your radio has. Our
programming software has easy to follow on screen instructions for
making these changes. Our programming software is available for
download via our website.

Public Address

To use the transceiver as a public address system, connect an external
8 ohm speaker that is able to handle at least four watts to the PA jack on
the rear panel. Direct the speaker away from the microphone to prevent
acoustic feedback. Physical separation or isolation of the microphone
and speaker is important when operating the PA at high output levels.

Improper Radio Adjustments

Service by unqualified technicians could result in damage to your
radio. Never allow anyone to disable your radio’s modulation limiting
circu itr y. We ha ve des ign ed your r adi o for o pti mal pe rformance
and durability. Disabling this circuitry could damage your radio and
potentially void your factory warranty!

For further service information please visit www.StrykerRadios.com.

Operating Guide

FUNC:

1.

Pressing this button in for approximately three seconds allows

you to access the function menu.