General Information

Serial #

6935

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

PLASTIC CASING/ METAL & SYNTHETIC WORKING PARTS

Dimensions

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

Length

17.0 cm

Width

14.5 cm

Height

16.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Upper air pressure, temperature & humidity measurement

Sub-Category

N/A

Manufacturer

AKA

JOHNSON

Country

United States of America

State/Province

Unknown

City

Unknown

Context

Country

Unknown

State/Province

Unknown

Period

C. 1959

Canada

Unknown

Function

DEVICE RAISED BY BALLOON INTO UPPER ATMOSPHERE TO MEASURE TEMPERATURE,HUMIDITY, & AIR PRESSURE & TRANSMIT DATA TO EARTH. WIND SPEED & DIRECTION CAN BE DETERMINED BY TRACKING RADIOSONDE.

Technical

A 1950'S STYLE OF AMERICAN RADIOSONDE CONTROLLED BY A BAROSWITCH, WHICH HAS AN ANEROID SENSOR & ALSO SWITCHES IN THE CERAMIC RODTHERMISTOR (TEMPERATURE SENSOR) & ELECTROLYTIC PLASTIC STRIP HUMIDITY SENSOR, &REFERENCE RESISTORS. THESE ELEMENTS ARE HOUSED IN A PLASTIC CASING WITH AN OUTRIGGER & A TRANSMITTER CONE.

Area Notes

Unknown

Details

Markings

BLACK & WHITE DECAL ON FRONT READING 'SIGNAL CORPS U.S. ARMY/ RADIOSONDE MODULATOR/ MD-147A/AMT-4A/ ORDER NO. 3079-PHILA-51-01/ JOHNSON SERVICE/ COMPANY SERIAL NUMBER 0935'/ BLUE '1959' HANDWRITTEN ON FRONT

Missing

TRANSMITTER CONE/ BATTERY/ THERMISTOR/ HYGRISTOR/ CASING TOP PIECE From CA of 10/22/1993 by Tony Missio: Yes - missing thermistor, hygristor, hygristor cover, transmitter

Finish

WHITE CASING/MULTICOLOURED SYNTHETIC

Decoration

N/A