G7257
G7257
The G7257 Audio Control Panel has dimensions of 4.485 in (height) x 5.735 in (width) x 6.5 in (depth) and weighs 3.5 lbs. It operates on 28 VDC power, with typical power consumption at 10 Watts and a maximum of 16 Watts during lamp tests. The panel supports dimming from 0 to 5 VAC.
Connectors
The panel uses three connectors: J1, J2, and J3, compatible with M83723 series connectors.
Color and Markings
The front panel is available in Boeing Brown or Gray, with rotary knobs in Boeing Beige or Gray. Volume knobs are clear plastic with white markings, and push buttons are non-reflective black.
Compliance and Certification
The panel complies with RTCA/DO-160E, RTCA/DO-178B, RTCA/DO-214, ARINC 720, ARINC 736A, and Boeing D6-52191-1 standards. It is certified under TSO-C139 and for B757-200/300 aircraft.
Features
The panel interfaces directly with VHF and HF radios and controls two SATCOM channels. It includes features such as flashing call annunciations, SELCAL alert resets, ground call activation, and a liquid splashproof design. It offers reliable switch design with over 1 million actuations, LED lighting, and sun-light readable MIC selector indication. The panel supports non-volatile storage of settings and has a modular design for flexibility and maintenance. The calculated MTBF is 16,000 operating hours.
Additional Versions
The G7257-11 is a gray version of the G7257-01, and the G7257-02 includes OXY/BOOM selection via input discrete.
Catalog excerpts
G7257-() Audio Control Panel GENERAL SPECIFICATIONS Dimensions 4.485 in/113.9 mm (height) x 5.735 in/145.7 mm (width) x 6.5 in/165.1 mm (depth), including rear connectors Weight 3.5 lbs/1.6 kg (max) Electrical Requirements Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 VDC – Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Watts (typical) – Normal Operation, Panel Lights at Full Bright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Watts (max) – Lamp Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Watts (max) Panel Dimming * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 - 5 VAC * Minimal current required – only used for brightness level control Connectors J1 Mating: M83723/75R2041N, or equivalent 41 pin connector J2 Mating: M83723/75R1831N, or equivalent 31 pin connector J3 Mating: M83723/75R20418, or equivalent 41 pin conn
Open the catalog to page 1
G7257-() Audio Control Panel Color Front Panel – Boeing Brown BAC #8328 or Gray FED STD 595b36118 Rotary Knobs – Boeing Beige BAC #8925 or Gray FED STD 595b36118 Volume Knobs – Clear plastic (Markings - White FED STD 595b37875) Front Panel Markings – White FED STD 595b37875 (Futura Medium Condensed font) Push Buttons – Non-reflective Black FED STD 595b37038 Compliance RTCA/DO-160E (Environmental), RTCA/DO-178B (Software), RTCA/DO-214 (Audio) ARINC 720, ARINC 736A Boeing D6-52191-1 Certification TSO-C139 B757-200/300 Features Interfaces directly to VHF and HF radios (no AMU required) Digital controller...
Open the catalog to page 2All Gables Engineering catalogs and technical brochures
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