4
Table of Contents
1-800-773- 7931 W W W .PALST AR.CO M
Important safeguards
2
Table of Contents
4
General Description
5
Installation
6
Unpacking
6
Location
6
Installation Procedures
6
Rear Panel Connections
7
Front Panel Description
8
AT4K Schematic
10
Operating Your AT4K
12
Before Operating
12
Tuning
12
Pre-tune Settings
12
Power Specifications
16
Troubleshooting
16
Specifications
17
Meter Board Adjustments
18
Service and Warranty
19
Thank you for purchasing a Palstar AT4K Antenna Tuner. This
antenna tuner has been designed and manufactured to high qual-
ity standards, and will provide reliable operation for many years.
Please carefully read the Owner’s Manual in order to take advan-
tage of the many interesting features that will provide years of en-
joyable amateur
Specifications 17
1-800-773- 7931 W W W .PALST AR.CO M
Front Panel Indicators and Controls
Metering
Dual movement cross needle power and frequency
compensated coupler
Controls
Input Tuning
480 pF variable capacitor (6kV Peak)
Output Tuning
480 pF variable capacitor (6kV Peak)
Inductance
28 µH roller ceramic body roller inductor wound
with 10 gauge wire
Antenna Selector Switch
6 position:
Coax 1 tuned and tuner bypass
Coax 2 tuned and tuner bypass
Bypass and balanced antenna
Wafer switches are ceramic (7kV/10A)
Power Range Switch
2 position 300 Watts-LO /3000 Watts-HI
Rear Panel Connectors
Coax connectors
SO239 connector (silver/gold/TFE)
Balanced Line
Dual, High Voltage Nylon66
TM
terminal posts
Other
Frequency Coverage
1.8 — 29.5 MHz
Power
2500 W single tone continuous, 4 kW PEP
Impedance Range
See chart of power/complex Z on page 16 for
per band ratings
Balanced Output
1:1 current type Balun at input-Ferrite
Dimensions
6.5”H x 15”W x 16”D (incl. terminals)
Weight
22 lbs.
Materials
Chassis parts, brackets and top cover are gold
chem-film coated aluminum (.090” thick). Powder
coating on painted parts.
