TM 750-5-3
AN/AMT-4( )
7. MAJOR COMPONENTS:
1. NOMENCLATURE: Radiosonde Set AN/AMT4 ( ).
Radiosonde Modulator MD147( )/AMT4A.
2. TYPE CLASSIFICATION: Standard A.
Radiosonde Transmitter T304( )/AMT4A.
Temperature Element ML419/AMT4A.
3. SECURITY REQUIREMENTS: Unclassified.
Humidity Element ML418 /AMT4A.
4. PRIMARY USE OR CONCEPT OF EMPLOYMENT:
Radiosonde Modulator MD210A/AMT4B.
Furnishes data on temperature, humidity, and pressure
Radiosonde Transmitter T435 A/AMT4B.
of the upper air.
Humidity Element ML476/AMT/4B.
Resistor, 47,000 ohms 20% AN/AMT4B.
5. BRIEF FUNCTIONAL DESCRIPTION: Radiosonde Set
Pressure calibration chart.
AN/AMT4( ) is a balloon-borne, battery-powered me-
teorological instrument which transmits signals relating
8. SET, SYSTEM, FACILITY, AND CONFIGURATION
to the pressure, temperature, and humidity of the air-to-
APPLICATIONS: This set is used in a system with Rawin
ground receiving equipment. The AN/AMT4( ) trans-
Set AN/GMD1( ) and Radiosonde Recorder AN/TMQ
mits signals to a rawin set which is connected to a radio-
5( ).
sonde recorder. The recorder prepares a flight record on
9. ADDITIONAL EQUIPMENT REQUIRED AND AUX
calibrated graph paper which is used to evaluate the in-
ILIARY EQUIPMENT:
formation received from the radiosonde set. Information
a. Additional Equipment.
for computation of wind direction and speed is obtained
Battery Pack BA259/AM.
from Control Recorder C577 IGMD1 of Rawin Set AN/
Meteorological balloon, inflating and launching acces-
GMD1( ), from the rise and horizontal drift of the
sories, and parachute.
radiosonde set. Meteorological data provided by the AN/
Radiosonde Baseline Check Set AN/GMM1.
AMT4( ) are used for analyzing and forecasting weather
Rawin Set AN/GMD1( ).
conditions, guiding aircraft, planning missions for air-
Radiosonde Recorder AN/TMQ5C, AN/TMQ5A,
craft, and preparing ballistic correction data for the ef-
AN/TMQ5B, or AN/TMQ5C.
fect of the atmosphere on the trajectory of artillery pro-
Test Set T538/U, TS538A/U, TS538B/U, or TS
jectiles, missiles, and rockets.
538C/U.
6. TECHNICAL CHARACTERISTICS:
b. Auxiliary Equipment. None.
Range of measurements:
10. TOOLS AND TEST EQUIPMENT: None.
Atmospheric pressure _ _ 1,060 to 5 mb.
Temperature _ _ _ _ _ _ _ _ +60 C. to -90 C.
11. REFERENCE DATA AND LITERATURE:
Relative humidity _ _ _ _ 10% to 100%.
TM 112432A _ _ _ _ _ _ _ _ _ _ _ _ _ AN/AMT4(A,B)
Accuracy:
TM 11666022810 _ __ _ _ _ _ _ _ AN/AMT4C, D
Atmospheric pressure _ 4 mb.
TM 11666021912, 20P,
AN/GMM1, 1A
Temperature _ _ _ _ _ _ _ 1 C.
35P.
Relative humidity _ _ _ _ 1 0 % .
TM 11666020410, 25, 25P,
AN/TMQ5( )
Distance range:
ESC.
Altitude _ _ _ _ _ _ _ 100,000 ft (30,480 meters)
TM 11662521312, 20P,
TS538/U
max.
35, 35P.
Horizontal _ _ _ _ _ _ _ 125 mi (201,125 meters)
12. REPAIR PARTS SUPPORT CAPABILITY: No den-
max.
sity.
Radiosonde Modulator:
MD147 ( ) /AMT4A.
13. TRAINING REQUIREMENTS: Operator MOS 93E
MD210A/AMT4B.
20, 93F20.
Radiosonde Transmitter:
T304 ( )/A MT4A.
14. TYPICAL BASIS OF ISSUE:
T435A/AMT4B.
Allowance
TA
M2WOH8AA
1
T436 A/AMT4B.
__ _ _ _ _ _ _ _ _ _ _ _ _
Power requirements _ _
115, 6, and 1.5 vdc (Bat-
15. PRICE DATA:
tery Pack BA-259/AM).
a. M a j o r i t e m _ _ _ $ 1 7 . 6 0 .
Frequency range:
b. R e p a i r p a r t s ( 1 - y e a r
T304()/AMT4A _ 1,668 to 1,692 MHz.
cost based on 100
T435A/AMT4B _ _ 1,660 to 1,700 MHz.
equipments) _ _ _ __ _ Expendable, nonrepairable.
Preset frequency _ _ _ _ _ _ __ _ _ 1,680 4 MHz.
Type of signal _ _ __ _ _ _ _ _ Am.
16. ITEM REPLACED: None.
Antenna _ _ _ _ _ _ _ _ _ _ _ _ _ Dipole, current fed.
17. REMARKS:
Approximate weight including
battery _ _ _ _ _ _ _ _ _ _ _ _ 1,105 g.
Issued as a unit replacement.
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