General Information

Serial #

32962

Part Number

14

Total Parts

14

AKA

N/A

Patents

N/A

General Description

Unknown

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

N/A

Width

N/A

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Aviation

Category

Aircraft instruments

Sub-Category

N/A

Manufacturer

AKA

SHURE

Country

United States of America

State/Province

Illinois

City

Evanston

Context

Country

Worldwide

State/Province

Unknown

Period

Used within the Dash 7-100, which was active between March 27th 1975 until October 26th 1988.

Canada

This microphone was used aboard a de Havilland Canada DHC-7 Dash 7-100, which is currently on the floor of the hangar at the Canadian Aviation and Space Museum.

Function

The Model 488T Microphone is designed for clear, crisp, natural voice reproduction combined with a highly effective noise-canceling function (Ref. 1)

Technical

The Model 488T incorporates the Shure controlled magnetic cartridge in high-quality, extremely reliable, hand-held unit of professional design, small size, and light weight. The transistor amplifier of the model is designed to match carbon microphone type input circuitry. Noise cancellation in the microphone is obtained through the combination of highly directional operation and superior discrimination against noise or unwanted sounds from a relatively distant source. The microphone rejects sounds originating at distances over 15 cm. This means that engine noise, wind noise, propeller noise, noise from vibrating panels and all other sources are discriminated against. The shaped frequency response of the microphone optimizes performance in the frequency range of 200 to 4000 Herz. (Ref. 1) Le modèle 488T incorpore la cartouche magnétique réglable Shure dans une unité de haute qualité, très fiable, portative avec un motif professionnel, petite dimension et légère. L'amplificateur à transistors de ce modèle est conçu pour correspondre le circuit d'entrée des types des microphones à charbon. La suppression de bruit dans ce microphone est obtenue à travers une combinaison d'opérations à forte directivité et une discrimination supérieure contre le bruit ou les sons non désirés venant d'une source relativement distante. Le microphone rejette des sons qui viennent d'une distance au-dessus de 15 cm. La réponse en fréquence du microphone optimise la performance dans les fréquences de 200 à 4000 Herz.

Area Notes

Unknown

Details

Markings

On the base of the microphone: " SHURE BROTHERS, INC. /. MODEL NO. 488T /. EVANSTON, ILL. U.S.A. /. SEE PATENT NOTICE INSIDE " On the black plate on the microphone: " CERTIFIED TO MEET FAA /. T50 C58 CATEGORY "B" /. SERIAL NO. 32962 /. WEIGHT 3/4 LBS. " On the connector adapter: " PJ-068 "

Missing

Appears complete.

Finish

Aircraft microphone with a dark green synthetic exterior. The microphone has an attached synthetic neoprene-jacketed black spiral cord. The extremity of the cord has a bronze metal connector.

Decoration

N/A