Continental Electronics 816R - Page 20

CONTROL indicator LED A1CR31 indicates
automatic power control is selected and MAN PWR
CONTROL indicator LED A1CR30 indicates
manual power control is selected.
Power Control Relays, P/O A10A2.
Assembly A10A2 provides remote manual power
lower and raise control. When power is decreased
at the remote control panel, relay K4 is energized.
Closed contacts provide 115 V ac to motor
A2A9B1 which adjusts the resistance of A2A9R1 to
decrease the transmitter power output. When the
power is increased at the remote control panel,
relay K6 is energized and closed contacts provide
115 V ac to motor A2A9B1 which adjusts the
resistance of A2A9R1 to increase the transmitter
power output.
Remote Relays, P/O A10A2.
Remote relays in A10A2 parallel the front panel
control operations. Failsafe relay K8 is energized
only when 28 V de is present in the control circuit.
If the 28 V de is lost, the relay de-energizes and
removes plate power from the transmitter. Second
power level (low power) relay K7 must also be
energized continuously (28 V de) to maintain the
second power level.
16