Palstar AT4K Technical Manual
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Palstar AT4K Technical Manual

2500 watt antenna tuner
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Palstar products are designed by
Hams for Hams carrying on the
Palstar tradition for high-quality
products designed and
manufactured in Ohio, USA.
AT4K 2500 Watt
Antenna Tuner
2500 W single tone, low loss, wide Z range
160m to 15m
Custom variable capacitors and inductor
Dual movement cross needle meter
6.5" x 15" x 16"
9676 N. Looney Rd,
Piqua, OH 45356 USA
(937) 773-6255
(800) 773-7931
(937) 773-8003 (Fax)
www.palstar.com
PALSTAR
PALSTAR
AT4K 2500 Watt Antenna Tuner
Technical Manual
Designed and Manufactured in the USA
Copyright 2018 Palstar, Inc.

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Summary of Contents for Palstar AT4K

  • Page 1 PALSTAR Palstar products are designed by Hams for Hams carrying on the Palstar tradition for high-quality products designed and AT4K 2500 Watt Antenna Tuner manufactured in Ohio, USA. Technical Manual AT4K 2500 Watt Antenna Tuner 2500 W single tone, low loss, wide Z range ...
  • Page 2 1 : 1 c u r r e n t t y p e b a l u n a t i n p u t - F e r r i t e  Designed to handle both Balanced line feeds and Coax feeds the AT4K D I M I N S I O N S : 6 .

  • Page 3: Installation

    ) t h r o u g h t h e t u n e r. if 12VDC adapter is connected to rear panel Page 3 PALSTAR...

  • Page 4: Front Panel Description

    6. POWER ON The IN position provides power for the PEAK and PEAK by a crank handle. Coupled to the crank handle is a gear-driven HOLD metering circuit, relay and meter illumination. precision mechanical counter; Max. = 0; Min. = 229. Page 4 PALSTAR...

  • Page 5: At4K Schematic

    PALSTAR AT4K SCHEMATIC © COPYRIGHT PALSTAR 2018 Page 5...

  • Page 6: Inside View

    METER BOARD ADJUSTMENTS INSIDE VIEW VARIABLE COUPLER CAPACITORS Reverse Reverse Forward Forward High High Peak Peak Peak Power Peak On/O Hold Range High METERING PEAK/HOLD ASSEMBLY Page 6 PALSTAR...
  • Page 7 OPERATING YOUR AT4K OPERATING YOUR AT4K 5 . S e t P O W E R R A N G E s w i t c h t o 3 0 0 W ( b u t t o n o u t ) .

  • Page 8: Troubleshooting

    80m - 15m - 2500 watts the roller wheel. Do not transfer any of the conducting grease from the rod to 10m - 1000 watts (29.5 MHz max.) the roller coil body, as this will contaminate the windings. Page 8 PALSTAR...

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