BIRD ECONOLOAD 8730 Series, Instruction Book

Page: 32 / 34

Maintenance
20
Specifications
Frequency Range
8730A
8731
8732A
8738A DC - 1000 MHz
1 kHz - 1000 MHz
DC - 45 MHz
1 kHz – 1000 MHz
Power Rating
All models except 8732A
8732A 10 kW average
Depends on flow rate. See table below.
Max Power Min Flow
at (8732A) 60º C (140º F)
Thermoswitch Thermoswitch
P/N Open Temp
10 kW 6 gal. / min.
(23 L / min.) N/A N/A
8 kW 4 gal. / min.
(15 L / min.) 2450-095-1 72º C
4 kW 1.1 gal. / min
(4 L / min.) 2450-095-3 79º C
5 kW contin. 2.6 gal. / min.
10 kW pulse (10 L / min.)
2450-095-3 79º C
Mode CW, AM, FM, SSB, TV and certain pulse types
Impedance 50 ohms nominal
VSWR 1.10 max.
Connectors
8730A 1-5/8" EIA Flanged
8731 3-1/8" EIA Flanged
8732A 7/16 Jack, IEC Type 169-4
8738A 3-1/8" Unflanged
8738A110 Unflanged with integrated, slotted outer
conductor adapter
Operating Position Any
Coolant For operation at 1kHz or lower, use only distilled water as the
coolant.
For operation at greater than 1kHz use distilled or potable water.
*
Coolant Connections ¾" standard hose thread
½” barbed hose fitting (model 8738A110)
Temperature Range 5 to 60 °C (41 to 140°F)
Flow Rate, Min 4 gal./min (15.2 L/min) @ 5 °C (41 °F)
6 gal./min (22.7 L/min) @ 60 °C (140 °F)
Flow Rate, Max. 12 gal./min (45.4 L/min)
Dimensions, Nominal 2.5” diameter x 12” long (64 x 305 mm)
2.5” diameter x 13-3/8” long (64 x 340 mm) - Model 8738A110
Weight, Nominal 8 lb. (3.6 kg)
* Potable Water: Standards for potable water have been established by the U.S. Public Health Service at
a maximum of 500 ppm of total dissolved solids (ppm - parts per million or 1 mg per liter). Hardness of
water (content of calcium and magnesium salts) should be less than 75 ppm. If the quality of the
available water supply is doubtful or the mineral content is questionable, use distilled water.