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Installation and Operation Manual
245 Speaker Amplifier
Chelton Avionics Inc. doing business as Wulfsberg
Electronics Division is responsible for full distribution and
revisions
Airworthiness).
For inquiries regarding the content and currency of this
manual contact Wulfsberg Electronics Division, 6400
Wilkinson Drive, Prescott, Arizona, 86301.
(928) 756-1615 or refer to the following website:
www.wulfsberg.com
SM245
REV 4.20
IMPORTANT NOTICE
of
ICA's
(Instructions
for more information.
SEALED
Copyright 2005 by Cobham
for
Continued
Telephone
2013.08.29
17:33:26
-07'00'
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Summary of Contents for COBHAM 245
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Page 1: Installation And Operation Manual
Installation and Operation Manual 245 Speaker Amplifier SM245 REV 4.20 IMPORTANT NOTICE Chelton Avionics Inc. doing business as Wulfsberg Electronics Division is responsible for full distribution and revisions ICA's (Instructions Continued Airworthiness). For inquiries regarding the content and currency of this manual contact Wulfsberg Electronics Division, 6400 Wilkinson Drive, Prescott, Arizona, 86301. - Page 2 17:25:31 -07'00' -07'00' Revision Revision Description Issue Date Number DCA W13221. In section 1.5, 245-001 input was erroneously listed as1.0 4.20 Aug 29, 2013 Vrms into 1800 ohms. Installation and Operation Manual Page ii ENG-FORM: 800-0108.DOT CONFIDENTIAL AND PROPRIETARY TO COBHAM...
- Page 3 245 Speaker Amplifier SM245 Installation and Operation Manual Periodically Cobham will release manual amendments. In order to maintain the most accurate and up to date manual these amendments should be carried out immediately upon receipt and recorded on the following amendment record.
- Page 4 245\245-1 Rev 1.50 245\245-1 Rev 1.60 245-41\245-3 Rev A 245-41\245-3 Rev 1.11 245-41\245-41 sht 1 of 2 Rev 1.50 245-41\245-41 sht 1 of 2 Rev 1.60 245-41\245-41 sht 2 of 2 Rev 1.60 245-41\245-41 sht 2 of 2 Rev 1.70 245-51\245-001-3 Rev A 245-51\245-001-3 Rev 1.11...
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Page 5: Table Of Contents
2.3.3 Cabling and Wiring 2.3.4 Mechanical Installation 2.3.5 Post-Installation Checks 2.3.6 Log Entries Airworthiness Limitations Accessories Required But Not Supplied Installation Drawings Operation Introduction General Operation Specifics Installation and Operation Manual Page iv ENG-FORM: 800-0108.DOT CONFIDENTIAL AND PROPRIETARY TO COBHAM... -
Page 6: Introduction
It is intended to be a direct replacement for the Collins model 356F-3. Features The Model 245 is rated at 18 watts into a 4 ohm load. This is a peak rating intended for speech and music. The continuous rating of the amplifier is 10 watts into 4 ohms, sine wave. -
Page 7: Physical Specifications
TSO Compliance: TSO-C50c, RTCA DO-214 Unit Nomenclature Any derivatives of the Model 245 base unit are represented as Model 245-xxx, where xxx represents the specific derivative. All differences between the base unit and the -001 and -002 derivatives are shown below. -
Page 8: Introduction
Allow 3 inches from the end of the wire to the shield termination to allow the backshell to be easily installed. Installation and Operation Manual Page 2-1 Amendment # 1 Jul 19, 2006 ENG-FORM: 805-0108.DOT CONFIDENTIAL AND PROPRIETARY TO COBHAM... - Page 9 The finish on the case is electrically conductive, and it is not necessary to remove the finish for electrical bonding. Caution: do not connect the audio outputs to power return or chassis ground. Installation and Operation Manual Page 2-2 Amendment # 1 Jul 19, 2006 ENG-FORM: 805-0108.DOT CONFIDENTIAL AND PROPRIETARY TO COBHAM...
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Page 10: Mechanical Installation
The Model 245 may be mounted in any position. No shock or vibration isolators are required. For proper heat dissipation, the Model 245 should be mounted on a metal surface of at least 100 square inches. The amplifier case should also be grounded to the airframe. -
Page 11: Airworthiness Limitations
14 CFR §§ 43.16 and 91.403, unless an alternative program has been FAA approved. Maintenance of the 245 Speaker Amplifier is “on condition” only. Periodic maintenance of this product is not required. Assembly drawings, parts lists, and schematics are included in this manual for use during troubleshooting and repair. - Page 12 Interconnect...
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Page 16: Introduction
Information in this section consists of the functional and operational procedures for the Model 245 Speaker Amplifier General The Model 245 Speaker Amplifier is an electronic device that is capable of driving a 4-ohm cockpit speaker. It is intended to be a direct replacement for the Collins model 356F-3.
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