Heathkit SB-1000 - Voltage Wiring Configuration

Heathkit
OPERATION
Page 61
Refer to Pictorial 10-1 (Illustration Booklet, Page 65) for the locations of the front panel
controls and a brief description of each.
READING THE METERS
Refer to Pictorial 10-2 while you read the following
information.
MULTIMETER — The MULTIMETER switch on the
front of the Amplifier selects the left-hand meter
functions. Read the meter scale which corresponds to
the setting of the switch as shown in Table A.
GRID CURRENT meter — The right-hand meter
always indicates grid current between 0 and 300 milli-
amperes. The normal operating range is up to 200
milliamperes. Each division indicates 10 milli-
amperes.
Table A
MULTIMETER
SWITCH
POSITION
HIGH VOLTAGE
PLATE CURRENT
POWER OUTPUT
MEASURES
Plate voltage
Plate current
Peak RF power
SCALE
INDICATION
Center scale indicates 0 to 3500 volts (normal
operating range is 2700 to 3400 volts). Each
division represents 100 volts.
Top meter scale indicates 0 to 700 milliamp-
eres (normal operating range is up to 400
milliamperes, maximum). Each division
represents 20 milliamperes.
Bottom meter scale indicates 0 to 2000 watts.
The scale has 50-watt divisions below 1000
watts and 100-watt divisions above 1000
watts.
ALC detector
Bottom meter scale indicates 0 to 200
watts. You can estimate the approximate
drive level (average, not PEP) by dividing
the bottom meter indication by 10. This
indication is derived from the voltage at the
output of the ALC detector.