SPECIAL NOTICE This product is now licensed to Anodyne Electronics Manufacturing (AEM) from Northern Airborne Technology (NAT). AEM is responsible for all matters related to this product, including sales, support and repair services. Please note the transition to convert product manuals and supporting documentation is an ongoing process and is being addressed on an ‘as needed’ basis. All references to NAT product part numbers (and associated images) are equivalent to AEM product part numbers.
SM44-1 PA250 Series High Power Voice Amplifier INSTALLATION AND OPERATION MANUAL Rev: 2.00 April 22, 2012 Anodyne Electronics Manufacturing Corp. 15-1925 Kirschner Road Kelowna, BC, Canada. V1Y 4N7 Telephone (250) 763-1088 Facsimile (250) 763-1089 Website: www.aem-corp.com © 2012 Anodyne Electronics Manufacturing Corp. (AEM), All Rights Reserved CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual COPYRIGHT STATEMENT © 2012 Anodyne Electronics Manufacturing Corp. (AEM), All Rights Reserved This publication is the property of AEM and is protected by Canadian copyright laws. No part of this document may be reproduced or transmitted in any form or by any means including electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of AEM.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual Prepared By: Checked By: Approved By: Tom Betzelt Product Support Manager May 28, 2012 Loen Clement Designer May 24/12 Tony Pearson Designer Apr 22, 2012 The status of this installation and operation manual is controlled by issue shown on the title page. The status of each section is controlled by revision shown in the footer of each page.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual Table of Contents Section Title 1.0 Description 1.1 1.2 1.3 1.4 1.4.1 1.4.2 1.4.3 1.5 1.5.1 1.5.2 1.5.3 1.5.4 Introduction Product Description Design Features Specifications Electrical Specifications Physical Specifications Environmental Specifications Auxiliary Components Control Panel Microphone Loudspeakers Power Supplies 2.0 Installation 2.1 2.2 2.2.1 2.3 2.4 2.4.1 2.4.2 2.4.3 2.4.4 2.4.5 2.4.6 2.5 2.5.1 2.5.2 2.5.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual Section Title 3.0 Operation 3.1 3.2 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 Introduction General Information Controls and Indicators POWER Switch POWER Lamp GAIN Control AUDIO POWER (Level) Meter OVERLOAD Indicator LED Resetting the Protective Circuit Installation and Operation Manual Page 3-1 3-1 3-1 3-1 3-2 3-2 3-3 3-3 3-3 Page v ENG-FORM: 820-0100.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual Section 1.0 Description 1.1 Introduction Information in this section consists of product description, design features and specifications for the PA250 Series High Power Voice Amplifier. All derivative product information shall be contained in the applicable manual supplement, which may be obtained from AEM as required. Review all notes, warning and cautions. 1.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 1.4 Specifications 1.4.1 Electrical Specifications Input Power Supply Voltage +24 to +36 Vdc normal +28 Vdc max. Supply Impedance <0.05: Supply Current 0.01 A @ +28 Vdc (no signal) 15-20 A @ +28 Vdc (full power out) 3 A @ +28 Vdc (voice operation) Input Signals The signal levels shown below are required for full amplifier drive at the points and impedances shown.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 1.4.3 1.5 Environmental Specifications Temperature -35 to +60qC Altitude 25,000 feet Auxiliary Components The PA250 Series amplifier is designed to operate with specific compatible components to form an effective sound system. 1.5.1 Control Panel 1.5.1.1 AA21 The AA21 Cabin PA control unit is designed to provide centralized control for an aircraft’s internal and external PA systems.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 1.5.3 Loudspeakers Various types of loudspeaker arrays can be used in sounds systems using the PA250/700 amplifiers. They are identified by the style and number of drivers (and bells) in each speaker array as shown in Table 1. As a guideline for system configuration, there should be a minimum of 1 speaker driver/bell assembly for each 100 watts of amplifier power. Part No.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 1.5.4 Power Supplies Power can be supplied by storage batteries, electronic supplies or vehicle/aircraft power systems. Vehicle supplies of 24 – 28 Vdc are an obvious choice for most airborne/mobile installations. The 12 – 14 Vdc supply of the commercial vehicle can not be used. In the hand-pack series, sealed nickel cadmium cells are used. Adding extra cells can almost double the available power.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual Section 2.0 Installation 2.1 Introduction Information in this section consists of unpacking and inspection procedures, installation procedures, postinstallation checks and installation drawings for the PA250 Series High Power Voice Amplifier. Review all notes, warnings and cautions. 2.2 Unpacking and Inspection Unpack the equipment carefully.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 2.4 Installation Procedures 2.4.1 Cautions CAUTION: Use of a fully floating audio wattmeter or transformer coupled meter is recommended. Always check ADF and compass calibration after installing external speakers or ‘PA’ amplifiers. Significant single cycle errors may be caused by the concentration of steel and magnetic material. Use shielded cable exactly as shown and ground as indicated.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 2.4.3 Ground Site Selection Sound waves transmitted through air are strongly affected by wind, weather, time of day and intervening objects. Satisfactory sound projection over great distances is possible from a well-situated operating site that can take maximum advantage of these natural elements. Optimum location of the loudspeakers is the prime controlling factor in site selection.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 2.4.6 Post Installation Checks The PA system is not intended to be operated in a linear volume manner (i.e., it is not like a stereo system). The PA is designed to provide high levels of audio power under difficult conditions and does so by sacrificing some of the high fidelity for a higher average power output.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 2.5 Accessories A range of accessories are available for testing and complementing the sound system. 2.5.1 Dummy Load The TL-PA2 is a 2 ohm resistive load with a three foot cable and type MS3106A-16-11P connector for ready substitution in the speaker circuit or for connecting to the Meter Test Unit. One dummy load should be used per channel.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 2.6 Accessories Required But Not Supplied Installation kits are required to complete the installation. They consist of the following: 2.6.1 Power/Speaker Kit This kit is used for the Power/Speaker connection. For a straight connection use PAPWR-IKS and for a right angle connection use PAPWR-IKSR. PAPWR-IKS consists of Quantity 1 Description MS 5 Pin Female Straight Sealed Solder Cup AEM Part No.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual PAMIC-IKSR consists of Quantity 1 1 2.6.4 Description MS 3 Pin Female 90q Sealed Solder Cup Nut, Shaft Locking ¼" AEM Part No. 20-39-003 25-01-002 Remote Input Kit This kit is used for the Remote input connection. For a straight connection use PAREM-IKS and for a right angle connection use PAREM-IKSR. PAREM-IKS consists of Quantity 1 Description MS 7 Pin Female Straight Sealed Solder Cup AEM Part No.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual Section 3.0 Operation 3.1 Introduction Information in this section consists of functional and operational procedures for the PA250 Series High Power Voice Amplifier. 3.2 General Information The PA250 Series is built within an aluminum chassis, which provides a rugged case and an excellent heat sink.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 3.3.2 POWER Lamp The POWER lamp should illuminate red when the power switch is selected ON, the voltage and polarity of input power is correct and no protective circuit has tripped. If the POWER lamp is pressed with the power switch off, it will illuminate red to indicate the presence of DC power at the input power receptacle.
PA250 Series High Power Voice Amplifier SM44-1 Installation and Operation Manual 3.3.4 AUDIO POWER (Level) Meter The AUDIO POWER meter indicates the audio voltage going to the speaker load. The meter is calibrated so that the pointer will be in the red area of the display at full power with the proper load. Note: 3.3.5 If the load is incorrectly connected, an erroneous meter reading will be given.
