H-28/GR

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H-28~GR.png
Electrical Chest Set H-28/GR is composed of a transmitter assembly, chest unit, and cord assembly. The equipment is used as a microphone with either wire or radio equipment. Provision is also made for connecting a headset for two way communication. This chest set may be used with Remote Control Equipment AN/TRA-2, Radio Control Central AN/TRQ-1 or Radio Set AN/CRC-3.


Specifications

CONSISTS OF
1 Chest Unit H-17/GT
1 Cord Assembly CX-660/GR
1 Dummy Plug Assembly Drawing Number SC-D-19222
PHYSICAL DESCRIPTION
Dimensions: (Chest Unit)
Length - 2-1/4 inches (57.15 mm)
Width - 4-1/2 inches (114.30 mm)
Height - 6 inches (152.40 mm)
Weight - Not rated
Microphone Data
Type - Carbon
Mounting - Swivel
Cord Data
Length - Not rated
Number of Conductors - 3
Number of Connectors - 2
Connector Designations
JK-53 Plug (Chest Set End)
PL-68 Plug (System End)
MICROPHONE
INPUT
Operating Current - 325 milliamperes, maximum
OUTPUT
Nominal Impedance - 28 ohms
Frequency Range - 400 to 3,200 cps
SWITCH BOX
Switch Function: Connects Microphone circuit and control circuit contacts
Switch Electrical Ratings
Current Rating - 2 amperes control circuit, 150 ma microphone circuit
Connector Designation
Microphone Jack mates with plug PL-291
Headset Jack mates with plug PL-54
Environmental Limitations
Equipment Operating:
Temperature - 40° F to +131° F
Elevation - Up to 10, 000 feet above sea level
Relative Humidity - Up to 98 percent
Equipment Non-operating:
Temperature - 80° F to + 160° F
Elevation - Up to 50, 000 feet above sea level
Relative Humidity - Up to 100 percent including condensation caused by temperature changes
Vibration - No mechanical resonance below 55 cps

Reference Files

MIL-C-13064
MIL-M-13189
SC-D-17462
SC-D-19222
ARCS Research and Development Corp Standardization of Chest Sets Final Report :Technical Analysis Phase Contract DA36-039, SC66416
MSS 5965-2