2
radio. Damage that results from operating with high SWRs is not covered
under your factory warranty!
Tuning the Antenna for Optimum SWR
For
maximum
performance
we
recommend
the
Stryker
SR-A10
Trucker antenna or the Stryker SR-5K Magnetic Mount.
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).
11
Start with the antenna extended and tighten the setscrew lightly
enough
so
that
the
antenna
can
be
lightly
tapped
with
your
finger
for
easy adjustment.
21
Set your Stryker radio to your desired operating frequency or the
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.
31
Extend the antenna a short distance and again follow the procedure
above.
41
When
the
lowest
point
has
been
reached,
switch
to
the
lowest
frequency
you
plan
to
operate
on
and
then
to
the
highest
and
compare SWR readings. They should be almost equal.
B. Antennas that must be cut to proper length.
11
Follow the procedure as in A above, but adjust the length by cutting
in
1∕8"
increments
until
a
good
match
is
obtained.
21
Be very careful not to cut too much off the antenna at one time.
Once it is cut, it can no longer be lengthened.
31
The whip is easily cut by filing a notch all the way around, then
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
external
speaker
jack
(EXT)
on
the
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.
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 EXT
speaker jack onthe rear panel. Direct the speaker away from the
microphone to prevent acoustic feedback. Physical separation or
isolation of the microphoneand 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
circuitry.
We
have
designed
your
radio
for
optimal
performance
and durability. Disabling this circuitry could damage your radio and
potentially void your factory warranty!
For further service information please visit www.StrykerRadios.com.
Trouble Shooting
Please visit www.strykerradios.com/faqs
You will find the most comprehensive and up to date list
For Sales Information Please Contact RoadTrucker Inc (www.RoadTrucker.com)
8312 Sidbury Rd.; Wilmington, NC 28411 - (800) 507-0482 / (910) 686-4281