Maintenance
26
Change in coverage
Changes in broadcast coverage may be caused by the same factors that pro-
duce VSWR changes. If coverage seems to have changed, look for VSWR
changes and use
High VSWR at startup or during operation
on page 25 for
troubleshooting.
It is important to recognize, however, that apparent changes in coverage may
be due to subjective factors or faults of the receiving equipment. Before doing
more than checking the VSWR, be sure that an actual coverage change has
occurred.
Pressure loss or excessive
gas usage
Failure to hold pressure may be caused by the following:
• O-ring missing or poorly installed in transmission line, feedline, or
baymount flange.
• Leaky end seal (see
Figure 2
on page 4).
• Loose connecting hardware between line segments or between the
baymount and the radiators.
• Mechanical damage to transmission line, transformer, or antenna.
Check for leaks using soap solution.
