Heathkit SB-1000 - SB-1000 Specifications

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INTRODUCTION
The Heathkit Model SB-1000 Linear Amplifier is a
completely self-contained, grounded grid, linear
amplifier. It is designed to operate at 1000 watts
PEP output on SSB or 850 watts output on CW.
The Amplifier is designed to be used with exciters
which deliver 100 watts or more output. It can be
used with less driving power, but will have a lower
output.
A broad-band, tuned-input circuit for each band feeds
the 3-500Z triode tube that is connected in a
grounded-grid configuration.
Heathkit
An ALC circuit developes negative voltage that can
be fed back to the exciter to reduce its gain when the
Amplifier is overdriven.
The antenna change-over relay is normally actuated
by relay contacts, or an electronic switch, in the
exciter to place the Amplifier in the transmit mode.
NOTE: The contacts or switch must be connected to
ground. Operational problems may occur if the
contacts have more than zero volts DC.
The Amplifier may be operated from cither 120 VAC
or 240 VAC, 50/60 Hz power sources. Operation from
a 240-volt AC line is recommended. Each side of the
line cord is equipped with a fuse to protect against
overloads,