4
Table of Contents
1-800-773-7931 WWW.PALSTAR.COM
Important safeguards
2
Table of Contents
4
General Description
5
Specifications 6
Installation 7
Unpacking
7
Location
7
Installation
Procedures 7
AT1KM
Schematic
8
Rear
Panel
Connections
10
Front Panel Description
11
Operating Your AT1KM
12
Before
Operating
12
Tuning
12
Notes
14
Service and Warranty
15
Thank you for purchasing a
Palstar AT1KM 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 AT1KM cont’d
13
1-800-773-7931 WWW.PALSTAR.COM
8. Key your transmitter and adjust the
power level for a reading of 100-150
watts on the FORWARD scale. Adjust
the INPUT, OUTPUT and INDUC
TOR controls for a minimum RE-
FLECTED reading while maintaining a
FORWARD reading of 50-100 watts
using your transmitter power control.
9. Read the SWR on the red scale at
the point where the two needles inter-
sect. Repeat TUNING the input and
antenna controls until the lowest SWR
reading is obtained.
This procedure takes patience the
first time. The input and antenna
controls vary the capacitors and
provide fine adjustments. 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 INPUT, ANTENNA and
INDUCTANCE controls on the chart
above for future reference. When you
retune, use these settings as your
starting point.
