TN720 ET-4 Transportable Radio System Case
MT-3/4 Radio Systems
TECHNICAL NOTES
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LMRSALES@CODANCOMMS.COM
CODANCOMMS.COMTECHNICAL NOTE:
TN720, REV 7-0-0, © Jan 2019
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The transportable radio case is 24.6” (62.5 cm) wide, 11.7” (29.7 cm) high and 19.7” (50.0 cm) deep, and weighs
approximately 50 lbs. (22.68 kg) with typical radio package installed. The maximum depth for equipment from the
rack to the bottom of the case is 8.25” (20.96 cm).
Frequency band RF Power Output Internal duplexer frequency separation
Highband VHF 0.5 - 8.0 or 30 Watts ≥ 2.0 MHz or ≥ 4.5 MHz separation
400 MHz UHF 0.5 - 8.0 or 30 Watts ≥ 5.0 MHz separation
700 MHz UHF 0.5 - 3.0 Watts ≥ 30 MHz separation
800 MHz UHF 0.5 - 3.0 Watts ≥ 45 MHz separation
900 MHz UHF 0.5 - 3.0 Watts ≥ 24 MHz or ≥ 39 MHz separation
There are several diff erent versions of the ET-4 case:
ET-4-A09-00 Black Polyethylene Transportable Case Only.
ET-4-A09-02 Black Polyethylene Transportable Case with Power Module and Accessory Storage Box.
ET-4-A09-10 Yellow Polyethylene Transportable Case Only.
ET-4-A09-12 Yellow Polyethylene Transportable Case with Power Module and Accessory Storage Box.
The ET-4 duty cycle and operating temperature is variable as follows:
Case Lid Duty Cycle Operating Temperature Range
Open 100% -40°C to +60°C
Closed 100% -40°C to +40°C
Closed 50% -40°C to +50°C
Closed 10% -40°C to +60°C
Typical battery capacity (@10% duty cycle with 30 Watts RF power output):
8 hours (10.5 AHr internal battery)
30 hours (35 AHr external battery)
90 hours (100 AHr external battery)
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