Acom 1500 Manual
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Acom 1500 Manual

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1. GENERAL INFORMATION ................................................................................ ...3
1-1.Introduction and Description ................................................................................... 3
1-2. Owner Assistance .................................................................................................. 3
1-3. Equipment Supplied ............................................................................................... 3
1-4. Features ................................................................................................................. 3
1-5. Safety Considerations, Explicit Definitions ............................................................ 4
2. INSTALLATION ....................................................................................................... 6
2-1. Unpacking and Initial Inspection ............................................................................ 6
2-2. Mains Voltage Selection ........................................................................................ 6
2-3. Amplifier Location Selection................................................................................... 6
2-4. Connections ........................................................................................................... 7
2-5. Installation of External Fan .................................................................................... 8
3. POWER ON, CONTROLS AND INDICATORS ...................................................... 9
4. OPERATION .......................................................................................................... 11
4-1. Turning ON and OFF ........................................................................................... 11
4-2. Changing Operate and Standby Modes .............................................................. 11
4-3. Antenna change ................................................................................................. .12
4-4. Tuning..............................................................................................12
4-5. Continuous carrier modes ................................................................................... 14
4-6. ON LINE Information Screens and Control Functions ........................................ 15
4-7. Auto-Protection System....................................................................................... 15
5. OFF LINE MODE.................................................................................................... 16
5-1. Display brightness control ................................................................................... 16
5-2. Auto-Operate enabling and disabling ................................................................. 16
5-3. Antenna output assignment......................................................................16
5-4. Reading Auto-protection Signatures..........................................................16
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Summary of Contents for Acom 1500

  • Page 1: Table Of Contents

    Table of Contents 1. GENERAL INFORMATION ................…3 1-1.Introduction and Description ................... 3 1-2. Owner Assistance ....................3 1-3. Equipment Supplied ....................3 1-4. Features ......................... 3 1-5. Safety Considerations, Explicit Definitions ............4 2. INSTALLATION ....................... 6 2-1. Unpacking and Initial Inspection ................6 2-2.
  • Page 2 6. MAINTENANCE………………………………………………………………………...17 6-1. Cleaning………………………………………………………………………………..17 6-2. Fuse Replacement………………………………………………………..…………..17 6-3. Tube Replacement…………………………………...…………………....17 6-4. The ACOM1500 Simplified Schematic Diagram…………………………………..17 6-5. Troubleshooting………………………………………………………………………18 7. SPECIFICATIONS……………………………………………………………………..20 7-1. Parameters……………………………………………………………………………20 7-2. Functions……………………………………………………………………………...20 7-3. Storage and Shipment……………………………………………………………….21 NOTE This unit has been set for 240VAC at the factory. Means are provided, however, to reconnect it for 200/240VAC, as well as for 100/120VAC, in 10-Volt steps.

  • Page 3: General Information

    If assistance is needed, you should contact your local dealer first. If you still have an issue you need to discuss with one of ACOM's specialists, the contact information is as follows: fax + 359 2 920 96 56, tel. + 359 2 920 96 55, e-mail acom@mail.orbitel.bg or by mail: ACOM OOD, Blvd. Nikola Mushanov 151, 1330 Sofia, Bulgaria.

  • Page 4: Safety Considerations, Explicit Definitions

     Less noise in the shack. The input bypassing and vacuum antenna relays are virtually silent even in the CW QSK mode thanks to specially designed mounting hardware.  Less QRM and improved Electro Magnetic Compatibility during tuning. Amplifier tuning can be achieved in less than 10 seconds at a quarter of nominal output power.
  • Page 5 W A R N I N G HIGH VOLTAGE! The amplifier works with high voltages up to 3000V, which are LETHAL! Also, for your safety, pull the amplifier power plug out of the mains wall outlet and WAIT AT LEAST 30 minutes EACH TIME BEFORE you remove the cover of the amplifier.

  • Page 6: Installation

    The only exception to this is if the unit has been custom ordered, in which case the voltage selection will be noted in the Table of Individual Data (Table 2-1, below). Table 2-1. ACOM 1500 Individual Data C A U T I O N The current consumed by the amplifier from the mains supply should not exceed 16A from 200/240VAC and 20A from 100/120VAC.

  • Page 7: Connections

    2-4. Connections Connection to your station must be accomplished in the order described below before you apply mains voltage to the amplifier. W A R N I N G Note that the grounding system may have to withstand currents over 20A with minimal voltage drop.

  • Page 8: Installation Of External Fan

    N O T E Your amplifier will not work if KEY-IN is not connected properly. Transceiver producers give different names to this output, such as TX-GND, SEND, T/R-LINE, PTT, etc. Some transceivers require that "ground on transmit" be implemented via a software command, or by changing the setting of a switch on the rear panel or in the interior of the transceiver.

  • Page 9: Power On, Controls And Indicators

    recommended. The auxiliary fan (92x92x25mm or 92x92x38mm) must be a brushless type, 2...5W/24VDC. It may be installed by your dealer or by the manufacturer on request. 3. POWER ON, CONTROLS AND INDICATORS C A U T I O N Do not turn the amplifier on for at least 2 hours after unpacking it in the room where it will be used.
  • Page 10 Control of the amplifier is accessible during OFF LINE and ON LINE states, each having several information screens and control functions (see Fig. 3-2): Fig.3-2 Information Screens and Control Functions Structure The OPER button changes operate and standby modes alternatively (S.4-2) while ON LINE. Please note that Auto-Operate might be enabled.

  • Page 11: Operation

    4. OPERATION Operation of the amplifier is simplified through use of the TRI tuning aid, Auto-Operate function, and automatic protection system, so you may begin using the amplifier immediately following installation. However, to make full use of the amplifier's potential and to fully configure it to your local conditions, we recommend that you thoroughly read the following information.

  • Page 12: Antenna Change

    When Auto-Operate is enabled, the amplifier will be maintained in operate mode by default, unless you use the OPER button manually to go to standby (in which case the Auto-Operate is suppressed temporarily). Pressing OPER again will restore the Auto-Operate feature. When the Auto Operate function is disabled, the amplifier will shift and stay in STBY mode after each protection trip.
  • Page 13 Adjust amplifier tuning when you change the band or between CW and SSB segments within the same band. Readjust it each time when you change the antenna, even in the same band, as well as periodically, even though you may have not changed band or antenna. A significant change in the environment, such as snow, ice, new or removed large metallic objects, alien wires nearby etc., can cause significant changes in the antenna impedance and an increased VSWR.

  • Page 14: Continuous Carrier Modes

    amplifier at nominal power without changing drive at all. Use this approach to shorten the tuning process duration. c) Tuning Procedure. While a continuous carrier (CW key down, RTTY or FM) signal at the desired frequency is still applied: - Look at the upper scale (forward power); obtain maximum power using the upper (TUNE) knob; - Look at the lower (Load Cap) scale and turn the lower (LOAD) knob in order to center the triangle marker at the "!"...

  • Page 15: On Line Information Screens And Control Functions

    For prolonged transmissions the amplifier gain can drop between 5% and 10% during the first minute which is normal while temperature balance of the tube is achieved. You can easily compensate this by increasing the drive power slightly. Once the drive power has been set, the output power remains stable with the time for hours.

  • Page 16: Off Line Mode

    5. OFF LINE MODE There are two control functions and 14 information screens available in the Off Line Mode of the amplifier. For example, you may control the VFD brightness, enable/disable the Auto-Operate feature, and assign the antenna outputs. You may also list the auto-protection signatures. The tube is not powered at all (only the micro-controller is active) during these operations.

  • Page 17: Maintenance

    - "n" is the successive number of the event (nr.1 is the latest, nr.7 is the oldest one); - A and B mark the first and second parts of an information screen pair. Two lines, three groups by six symbols (36 symbols in total) are to be copied concerning every one of the 7 memorized events, from 1A-1B through 7A-7B.

  • Page 18: Troubleshooting

    Many software-derived protections are based on this information. * Detailed electrical schematic diagrams are available from ACOM or from your dealer on request. 6-5. Troubleshooting See S.5-4 for the method of reading the auto-protection signatures. You can decode them using the information below.*...
  • Page 19 * Additional information is available from ACOM or from your dealer on how to interpret these values. Using an Excel application available from ACOM or your dealer free of charge, and a PC, you can decode these signatures.

  • Page 20: Specifications

    7. SPECIFICATIONS 7-1. Parameters a) Frequency Coverage: All amateur bands 1.8-54MHz, extensions and/or changes on request. b) Power Output: 1500W PEP or 1200W continuous carrier, no mode limit. In continuous carrier modes (RTTY etc.) for transmissions longer than 15 minutes (up to several hours depending on ambient temperature), the external auxiliary fan must be installed.

  • Page 21: Storage And Shipment

    e) Signatures of the amplifier internal status are stored in a nonvolatile memory for the 7 most recent auto protection trips. f) High brightness 5x7 dot character vacuum fluorescent display (VFD) with bargraph for forward peak power and text messages to the operator. g) Measurement and constant monitoring of 12 most important amplifier parameters via VFD.

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