Palstar AT2K 2000, AT2K Technical Manual

Palstar products are designed by
Hams for Hams carrying on the
Palstar tradition for high-quality
products designed and
manufactured in Ohio, USA.

AT2K 2000 Watt
Antenna Tuner

l 2000 W PEP SSB, 1500 W single tone

l 160 m to 10m

l Variable capacitor with vernier drive

l Dual movement cross needle meter

l 5” x 14.5” x 13.5”

9676 N. Looney Rd,
Piqua, OH 45356 USA

[phone]

[phone]
[phone] (Fax)
www.palstar.com

PALSTAR

AT2K 2000 Watt Antenna Tuner

Technical Manual

Designed and Manufactured in the USA

Copyright 2014 Palstar, Inc.

PALSTAR

l METERING: Dual movement cross-needle power

and frequency compensated coupler

l INPUT & ANTENNA TUNING: Variable capacitor 413pF 4.5 Kv

6:1 Vernier Drive

l INDUCTANCE: 25 μH roller inductor; 12 ga. wire wound

on steatite ceramic core, silver plated

bar and wheel

l ANTENNA SELECTOR SWITCH: 6 position:

Coax 1 - tuned and tuner bypass

Coax 2 - tuned and tuner bypass

Switch wafers are 3 kV rated

l POWER RANGE SWITCH: 2 position 300 W / 3000 W

l REAR PANEL CONNECTORS:

SO-239: RF Input, Coax 1 & 2, Bypass

COAX: Balanced line (optional balun)

END FED WIRE: High Voltage Nylon66™

terminal post & ground post

12 VDC INPUT: 14mm connector, 2.1mm ID,

5.5mm OD, center positive, 200 ma

l FREQUENCY COVERAGE: 1.8 - 54 MHZ

l POWER MAXIMUM: 2000 W PEP SSB, 1500 W single tone

l IMPEDANCE RANGE: 20 to 1500 Ω, 160m to 10m

(assuming resisitive load)

Reduce power for lower Z-range

l BALANCED OUPUT: 4:1 current type balun (optional external)

l DIMINSIONS: 5” H x 14.5“ W x 13.5” D

l WEIGHT: 13 LBS, 6 Kg

l CHASSIS & COVER: 11 ga., .090 gold Iridite Treated Aluminium

AT2K SPECIFICATIONS

Page 2 PALSTAR

Building on success, Palstar upgraded the best-selling AT1500CV
throughout to create the American-made Palstar AT2K Antenna Tuner.
The AT2K optimizes the performance of your antenna and transmitter
by providing adjustable impedance matching using a T-type circuit
conguration.

The AT2K also measures the power (upgraded to include a PEAK/PEAK
HOLD function) and Voltage Standing Wave Ratio (VSWR or SWR),
which allows you to tune the SWR to the lowest possible for the
selected transmission frequency.

The AT2K also features a precision steatite ceramic core roller inductor
with a plated roller wheel and roller shaft. The smaller size permits
operation on 6 meters.

A high voltage ceramic wafer switch allows selection between coax
feedlines or wire-fed antennas. DIRECT switch positions bypass the
impedance matching circuit but allow for the SWR, FORWARD, and
REFLECTED and PEAK power meter FUNCTIONS.

Tuning is achieved with the front panel mounted controls. The 6:1 ratio
Vernier dials allow for tuning with precision and accuracy, while the
Inductor crank handle facilitates coarse adjustments. The range of the
meter (300W/3000W) is selcted by a push button switch located on the
front panel.

AT2K GENERAL DESCRIPTION

UNPACKING

Carefully remove the AT2K from the shipping carton and

inspect it for signs of damage. If any damage is apparent,

notify the transportation carrier or dealer immediately.

KEEP THE PACKING CARTON for moving, storing, or

reshipping the tuner to us for repair if required.

LOCATION

Select a location for the AT2K that allows the connectors

to be free from any possible contact with people, pets,

or objects during operation and with unrestricted air

ow for cooling.

INSTALLATION PROCEDURE

Connect a coax cable from your transmitter to the RF

INPUT connector on the rear panel. Keep the cable as

short as possible. If you use a linear amplier, connect

your transmitter to the linear amplier input and the

linear amplier output to the AT2K.

DO NOT USE MORE THAN 1500 WATTS (single tone)

through the tuner.

INSTALLATION

Page 3

+

-

To 12-13.8v
Power Supply

2.1 mm
FEMALE plug

Grey

TRACE ID

Protection

Reverse diode

Red Heat Shrink

cover

AT2K DC POWER CORD

PALSTAR

REAR PANEL

GROUND post/wing nut

ground connector

COAX-BAL-WIRE

Use this connector
to connect an optional
external 1:1 or 4:1 balun
for balanced or wire feed
antennas

BYPASS coaxial

connector for output
to dummy load or third
coax output. Bypasses
tuner, but meter circuits
are on if AC adapter is
connected to rear panel

12 VDC INPUT

(2.1 mm plug,
center pin +)
12 VDC adapter
200 mA to power
the meter lamp

COAX 2 coaxial connector

for output to Antenna 2

RF INPUT

coaxial connector
for input from transmitter
or amplier

COAX 1 coaxial connector

for output to Antenna 1