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antenna tuner, at-615b, hamware, greyline performance, ham radio, vertical antenna, 160-10m
antenna tuner, at-615b, hamware, greyline performance, ham radio, vertical antenna, 160-10m
antenna tuner, at-615b, hamware, greyline performance, ham radio, vertical antenna, 160-10m
antenna tuner, at-615b, hamware, greyline performance, ham radio, vertical antenna, 160-10m
antenna tuner, at-615b, hamware, greyline performance, ham radio, vertical antenna, 160-10m
antenna tuner, at-615b, hamware, greyline performance, ham radio, vertical antenna, 160-10m
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Hamware AT-615B, 1500W ATU Remote Antenna Tuner, Balanced, Ladder Line

Regular price
$2,950.00
Sale price
$2,950.00

1.5 kW Automatic Remote Controlled Antenna Balanced Tuner Model AT- 615B Premium Quality, 1500 Watt Rated, Automatic Antenna Tuner by Hamware.

Features:

  • Built-in Lightning Arrester from each Antenna Leg to Ground

  • Matches balanced Antennas (Dipoles, Loops, Inv. Vees, etc.) for Frequencies from 1.8 MHz to 30 MHz. 

  • Antenna without Traps!

  • No RF Ground (Counterpoise, Radials, etc.)

  • Low Impedance Coax Cable from Shack to Tuner (Remember Computer, DX-Cluster, RF in the Shack etc.)

  • 600 Watts Continuous Power, 1500 Watts SSB/CW when tuned

  • 85 Memories to Store and Frequency dependent Automatic Recall matched Values

  • Consequent balanced Circuit Design to match complex Antenna Impedance. Balancing is done at the Input Terminals where the Impedance is purely resistive when the Antenna is matched!

N-type connector input. Balanced Open Wire Line Terminal screws at the output. Manually tune band segments and memorize settings. In operation, the tuner will recall the settings for a given band segment when it detects the RF.

The Control Cabinet contains the tuning controls, memory location selection, Automatic or Manual switching and a display that indicates the memory location in use, the frequency range as well as the span, and the tuner settings. 

Antenna Tuner System AT-615B Description
 
This tuner is designed to remotely match balanced HF antennas. 

This unit features an automatic selection of tuner settings based upon transmitted frequency. Unique to this tuner, no special cabling or adapters are required. The operator simply transmits into the antenna and the tuner detects the transmitted frequency and selects the correct settings from memory.

The matching circuit consists of a remotely tuned balanced π circuit. The balun is placed at the input of the tuner. The Output capacitor is a stepper motor controlled High Voltage variable capacitor.

The Ham bands are divided into 85 operator programmable memory locations. It will handle 1500 watts of SSB or CW power, and it can be used in either automatic or manual mode.

The Control Cabinet contains the tuning controls, memory location selection, Automatic or Manual switching and a display that indicates the memory location in use, the frequency range as well as the span, and the tuner settings.

Tuner System Block Diagram

 

Controller Unit:

Antenna matches are stored into a bank of 85 memory locations. Each memory location is a fraction of an amateur band. Refer to the technical section for the fractional segments for each band. As shown in the picture below, the upper line of the LCD shows the actual memory location chosen (lower edge frequency 1840 kHz) with its span (20 kHz). The control settings for this frequency are shown in the lower line of the LCD. In the Automatic Mode the memory location and its stored settings is selected by the transmitted input frequency. The input frequency is obtained from an RF probe. The memory location contents can be erased by a push button on the back of the controller.

The controller contains 3 rotary encoders that control the tuner elements TRX, L, and ANT. TRX controls the Input Capacitance, L controls the Inductance and ANT the output capacitance values. The lower line on the display shows these values.

A manual selector switch is provided for memory selection in the Manual mode.

Controller Unit

 

Controller Connections (Rear Side)

 

RF Probe Installation

If possible, the RF Probe should be attached directly to the antenna jack of the transceiver using an adaptor or a very short cable


RF Unit:

The RF Unit is contained in a weather-protected cabinet (IP66) and is UV resistant. There are two feed-thru insulators to connect to the antenna elements. The coaxial cable and the control cable are connected via an N and 254 pin connectors. There is no active circuitry inside the RF Unit. This is to ensure reliable operation even under non-matched condition.

The LC network is known as Balanced PI. At the front end of the network, there is a balun transformer that matches the unsymmetrical coax cable to the symmetrical tuner elements. This is the only place where the impedance of the system is purely resistive (when matched) and is the ideal place for the Balun. The regular station SWR meter (or the builtin meter in the TRX) is used as an indicator to match the antenna.

The capacitors at the front end are switched in 256 steps of 17 pF per step. The capacitor at the antenna side is a variable capacitor of 400 pF. The control of this capacitor is by a stepper motor with 0.9° per step. The inductive paths between the capacitors are switched in 31 steps from 0.2 µH to 35 µH. Switching is done by power relays. With the circuit components used it is possible to match short antennas up to an unlimited antenna length within the RF range from 1.8 to 30 MHz.

Interior view of the RF unit looking at the capacitor board, the inductor board is located below

 

Installation of the RF Unit

 

 

Antenna Selection Unit ASU-502 (optional)

 

Possible Tuner Applications

Application with Antenna Selection Unit ASU-502 for 2 Antennas