Bird Technologies 8201 User Manual

Page 22

Inspection

With the rugged and simple construction of the Models 8201

and 8203 Load Resistors, periodic inspection will be neces-

sary at only about six-month intervals. Inspection should in-

clude the items listed below:

1. Oil Leakage - Check for coolant oil seepage

around the radiator tank, particularly at the

front and back around the underside of the

clamping band.

2. Inspect the Load for completeness and general

condition of the equipment.

The Troubleshooting Chart lists the symptoms of commonly

encountered troubles, their causes, and suggested corrective

measures. Use the chart as a guide when analyzing symp-

toms.

Preventive

Maintenance

Because of the basic simplicity of construction, no special

maintenance procedures are required. Keep the equipment

clean, and occasionally check the coolant level in the radia-

tor tank.

Resistance

Check the condition of the load resistor by accurate mea-

surement of the dc resistance between the inner and outer

conductors of the RF connector. Use an ohmmeter with an

accuracy of 1 percent or better at 50 ohms for this purpose.

The measured resistance should be a nominal 50 ohms, ±2

ohms. Perform this test only when the load has cooled down

to room temperature. Refer to figure 2.

Bird Models 8201 & 8203 Termaline Coaxial Load Resistor

Figure 2

Resistance

Measurement