User's Manual Part 1

T6T 300 Watt VHF Transmitter Page 23 Specification
Dimensions and Weight
The transmitter consists of one drive assembly, three amplifiers and a combiner.
Transmitter
The dimensions and weights quoted below are for a complete transmitter (that is a drive assembly plus
three amplifiers):
Width 483 mm (19 inches).
Height 622.3 mm (24.5 inches). The height occupies 14U of equipment
cabinet space.
Depth 430 mm (16.9 inches) measured from front panel to rear panel.
465 mm (18.3 inches) measured from front panel to rear RF
connectors.
Weight 79 kg (174 pounds).
Combiner
The dimensions of the combiner, including connectors, are:
Width 205 mm (8 inches).
Height 180 mm (7 inches).
Depth 85 mm (3.4 inches).
Weight 1 kg (2.2 pounds).
Environmental
Temperature range The transmitter operates to specification across the temperature
range of -20°C to +55°C.
The transmitter can be stored at temperatures ranging from
-30°C to +70°C without causing any damage.
Humidity The transmitter operates to specification at a relative humidity
between 5% and 90% non-condensing.
Altitude The transmitter operates to specification up to 15,000 feet.
Additionally it is capable of storage at altitudes up to 50,000 feet
without damage.
Shock and vibration The transmitter complies with shock and vibration protection
MIL-STD-810E, method 516.4, procedure VI - Bench Handling.
Ventilation The transmitter is cooled by six integral fans that normally run at half
speed. At an RF PA temperature of 45°C this is increased to full speed
and at 40°C it reduces to half speed again.
The transmitter power supply units also use internal fans.
Warm up time The transmitter is fully operational within 20 seconds but can take up
to 10 minutes to achieve frequency accuracy for offset carrier.