MIL-T-14382 Truck, Ambulance: Diesel Or Gasoline Engine Driven, 10, 000 Pounds Gvw, 4X4, 4-Liter Commercial, Field TypeThis specification covers diesel or gasoline engine driven, four-wheel, four-wheel drive, field type ambulance trucks having a gross vehicle weight GVW rating of not less than 10,000 pounds. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-14382W

3.5.8 Siren. When specified (see 6.2), a low frequency type siren shall be installed outside

the vehicle or between the grille and the radiator. The siren shall have a chrome or enamel finish. A gasket not less than 1/16-inch thick shall be installed between the siren mounting bracket and the vehicle to minimize drumming. Reinforcement shall be provided, when needed, at the point

of attachment. The siren location shall permit servicing of the vehicle without removing the

siren.

3.5.8.1 Dual siren controls. The siren shall be capable of being actuated by both a foot operated switch and the standard horn actuator. A separate dash mounted switch, for driver preselection of horn or siren operation, shall be provided. Switch positions shall be identified.

3.5.9 Electronic siren, public address and radio amplifier system. When specified (see 6.2), an electronic siren system with selector controls for siren, public address and radio amplification through an external speaker shall be provided. The system shall be a Federal PA-20A,

Dietz 14-450, or Unity SPR73 Model or equivalent. The system shall have a sound intensity of

not less than 98 decibels at a distance of 100 feet from the speaker, using a reference pressure of

0.0002 microbar. The amplifier and its controls shall be installed inside the vehicle in a location

accessible to the driver and to the assistant driver. A microphone of the magnetic noise canceling type, connected by a coiled core, shall be provided and located in a position convenient for use

by both the driver and the assistant driver. Microphone stowage shall be provided on the instrument panel. The system shall permit the broadcasting of routine and emergency radio

announcements from an on board vehicle radio to be installed by the Government. A two-way radio audio tap cable, permitting incoming two-way radio messages to be rebroadcast through the

public address system, shall be furnished. Dual siren controls (see 3.5.8.1) shall be provided. The amplifier unit shall include volume control and selection of "Radio," "P.A.," and

"Siren mode." Siren mode controls shall include "Manual," "Yelp," "Wail," and "Hi-Lo" (European).

3.5.9.1 Speaker. An external weatherproof speaker shall be installed on the centerline of the cab roof or above the front bumper to the rear of the brushguard. Cab roof installation shall be in a location that will not obstruct light from or movement of the roof mounted spotlight. The speaker, when roof mounted, shall be of the low silhouette type, designed for roof mounting.

The speaker shall be of metal with a chrome finish or of fiberglass painted to match the vehicle

exterior color. A gasket not less than 1/16 inch thick shall be furnished between the speaker mounting bracket and the vehicle to minimize drumming. Reinforcements shall be provided on the vehicle at the point of attachment of the speaker. The speaker location shall permit servicing of the vehicle without removing the speaker.