10
beyond the point where the Amplifier's power output ceases to increase. If you turn the control
past this point, nonlinear operation may occur.
TUBE PRECAUTION
After prolonged operation, let the Amplifier run for several minutes without drive applied so the fan
will cool the tubes before you turn the Amplifier off.
READING THE METERS
R
efer to Front Panel Pictorial while you read the following information:
Multi-meter:
The Multi-meter switch on the front panel of the amplifier directly below the two
panel meters selects the right-hand meter functions. Read
the meter
scale which corresponds to
the setting of the Multi-meter switch as shown in Table A.
Table A
Multi-meter Switch
Position
Measures
Scale Indication
Plate Voltage (PV)
Plate Voltage
Bottom scale indicates 0 to 7.0
KV (normal operating range is 3.0
– 4.0 KV volts) Each division
represents .2 KV (200 volts).
Plate Current (PC)
Plate Current
Top meter scale indicates 0 to 1.4
amperes. Each division
represents .4 amperes (400
milliamperes).
Grid Current Meter:
The left-hand meter always indicates grid current between 0 and 300
milliamperes. Each Division indicates 10 milliamperes.
FRONT PANEL SWITCHES & CONTROLS
On/Off Switch:
Rocker type switch which turn the amplifier on or off
Operate/Standby Switch:
Rocker type switch used to place the amplifier in a transmit mode
Fan High/Low Switch:
Rocker type switch which control blower speed
ALC Control:
Varies the negative feedback voltage to your transceiver. A clockwise rotation
increases this voltage which reduces the drive power delivered to the amplifier from the
transceiver. The ALC line between the transceiver and the amplifier must be properly connected
for this feature to operate.
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