4 Table of Contents
1-800-773-7931 W WW.PALST AR . CO M
Important safeguards 2
Table of Contents 4
General Description 5
Specifications 6
Installation 7
Unpacking 7
Location 7
Installation Procedures 7
AT1KP Schematic 8
Rear Panel Connections 10
Front Panel Description 11
Operating Your AT1KP 12
Before Operating 12
Tuning 12
Notes 14
Service and Warranty 15
Thank you for purchasing a
Palstar AT1KP Antenna Tuner.
This antenna tuner has been
designed and manufactured to
high quality standards, and will
provide reliable operation for
many years.
Please carefully read the
Owner’s Manual in order to take
advantage of the many interest-
ing features that will provide
years of enjoyable amateur
radio operation.
Operating Your AT1KP cont’d 13
1-800-773-7931 W WW.PALST AR . CO M
Selecting COAX 1 DIRECT, COAX 2
DIRECT or BYPASS bypasses the tun-
ing selection.
7. Rotate the TUNE and INDUCTOR
controls for maximum noise or signal
as heard on your receiver. Refer to
preset tuning chart below
8. Key your transmitter and adjust the
power level for a reading of 100-150
watts on the FORWARD scale. Adjust
the TUNE and INDUCTOR controls
for a minimum REFLECTED reading
while maintaining a FORWARD read-
ing of 50-100 watts using your trans-
mitter power control.
9. Read the SWR on the red scale at
the point where the two needles inter-
sect. Repeat adjusting the Tune and
Inductor controls until the lowest
SWR reading is obtained.
This procedure takes patience the
first time. The Tune control varies
the capacitor and provides fine ad-
justments. The roller inductor crank
control provides coarse adjustment.
Notes
1. An SWR of 1:1 is best, but an
SWR as high as 2:1 may be acceptable.
Check your transmitter/amplifier man-
ual for details.
2. If you cannot get an acceptable
SWR, lengthen or shorten your an-
tenna and/or feedlines and retune.
3. Once every 4-6 months clean the
roller coil with 70% isopropyl alcohol
and a clean cotton cloth. Do not trans-
fer any of the conducting grease on the
rod that guides the roller wheel as this
will contaminate the windings on the
roller coil body.
4. Any time a new or different antenna
is connected, it is necessary to repeat
the tuning procedure for each antenna.
10. When you have tuned your an-
tenna to the best SWR, record the
settings of the TUNE and INDUC-
TANCE controls on the chart above
for future reference. When you re-
tune, use these settings as your starting
point.
CAUTION: When ap-
proaching the end stops
of the roller inductor,
(readings of zero or 248)
SLOW DOWN. Running
the roller too hard into
the mechanical end stops
on either end of the roller
inductor can damage it.
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