Heathkit SB-401 - Page 6

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NEUTRALIZING:
This
capacitor
is
adjusted
to
balance
out the
grid-to-plate
capacity
of
the
output
tubes,
RELATIVE POWER: Adjust this control for
a meter reading of 1/2 full scale when the
transmitter is fully loaded on 80 meters,
BIAS ADJUST: With driver tube (V9) removed
and key down, adjust this control for 50 ma of
plate current,
FREQ.CONTROL: This switch permits the se-
lection of either the internal LMO or the ex-
ternal LMO in the SB-301 Receiver, In the
UNLOCKED position, the LMO in the Trans-
mitter and the LMO in the Receiver operate
independent of each other, In the LOCKED
(RCVR) position, the LMO in the Receiver con-
trols both units,
ZERO SET KNOB
FINAL
LOAD:
This
control
is
adjusted
for
maximum
meter
indication
(REL
PWR),
Ittunes
the
Transmitter
for
maximum
output
by
matching
the
output
impedance
to
the
antenna,
FINAL: This control is adjusted for maximum
meter
indication
(REL
PWR).
It
tunes
the
Trans-
mitter
for
maximum
output
by
resonating
the
final tank,
DRIVER: This control is adjusted for maximum
meter indication (REL PWR). It tunes the
driver stage for maximum output,
FUNCTION:
This
switch
is
set
for
the
desired
Transmitter
function,
such
as
OFF,
STBY,
TRCV,
TRAN,
and
SPOT.
LMO DIAL KNOB: This knot
the
Transmitter
for
the
desir
quency
of
the
selected
band
»
LMO is used,
BAND:
This
switch
determines
the
amateur
band
or
the
500
kHz
segment
of
the
band
on
which
the
Transmitter
is
to
operate,
FIGURE 1-2