Operating Conditions; Transmitter Operation; Operation With S8-303 Receiver - Heathkit SB-401 Assembly Manual

Make sure the BAND switches of the Trans-
mitter and Receiver are always in the same
positions.
~C)l'~~: It rrlay be flcc('ssary
l()
readjust the hetr-ro dyn«
seillator toils
of til e Rc.ct'i\Tcr ()ll(' to
tile 1()a(Jitlg
l)y
tllc
lransmitter heterodyne oscillator circuit. Follow the SI~-:1():l
CAUTION: Do not attempt to transceive with
the Receiver in the AM or CAL modes, as the
units will not function properly.
\Vllell operating
lilt>.
SI~-4() I Transmitter and Sl~-~}():3
t{('eeiV(~f
as a transceiver, the IJ'!I() mode is selected from tile
Iransrni tter front panel. Either the
Transmitter
or Receiver
can he used Ior f
re<lll(~ll(~y
con Iro!
of tIle.
Transmi
tter , If
tl)t~
FREQ (_~()N'l'R()J~ switch i s
ill
the IJ().(~K~~l) (R(~VR)
position , the Transmitter will 1).. transmitting o n
l
hr:
fre(lue[lc~T at which the R(>,cciver is set. Therefore
~ it is
important that the }{eeeiver dial always he set within one of
Ihe a rna leur bands when IIY. Tran smitter is used. If the
FRE~
co
N'J'R
o
1.1 ~'vi tell is
ijl
the lIN I;()(= ~E:l~ posit ion ~ tll(~
L':]()
m tile
Transmitter
controls
the ()IJCrat.lrlg frequcncv .
Turn the Transmitter chassis on edge. With the
Receiver connected to the Transmitter, place an
RF probe on the center pin of the BFO jack on
the rear apron of the Transmitter. With the
Receiver turned on (the Transmitter need not be
on for this adjustment), adjust the Receiver BFO
output Coil (L20) until a maximum is obtained
(approximately 5 volts). This coil in the Receiver
is now properly set for transceiver operation and
will not need further adjustment.
OPERATION WITH S8-303 RECEIVER
heterodyne Oscillator Adjustment procedure (l.lsirlg tile
Sf~-~~03 calibrator signal) with the Transmitter connected to
the Receiver. It is not ne(~essary t.o turn
tile
Transmitter on
Io r
t hese
adju st me
It
Is.
The followillg operation information i s divided into
two
separate
sections.
Operation with SB-~3():~ Receiver
(transceiver operation}, an d Transmittcr Operation Only.
Each of these sections,
ill
turn, is divided into (:,,:' and SS[~
operation.
OPERATION TRANSMITTER
(a)
When using the Sl~~4()1 Transmi
t
tcr ill eornbinution
with
tll('.
sr~-:~()~~,
Sl~-:~()l, or SJ3-;3()() J{(~(~(~iv(~r with the
transceivc cables connected and the SlJA -4() 1-1 Crystal Accessory I)a(:kagc installed, the Transmit.tcr
FlJN(:"fl()N switch must be at
srrl{Y
or 1'1{(:V, otherwise a steady tone will he heard in tho ]{(~cciv('~r.
SPOT or TRAN
Transmitter
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Unlocked
Locked
Unlocked
Locked
Unlocked
SL~-401 and
SIj·303,
or
SU-301, or
SB-300.
TRCV
TReV
TRCV (a)
TRCV (a)
SPOTorTRAN
Disconnected
Connected
Connected
Connected
Connected
Disconnected
Installed
Unlocked
SB-4 1
and
Other
Receiver
FUNCTION
Switch
LMO, BFO,
and
HET OSC Trans-
ceive Cables
Transmitter
SBA-401-1
~-F-R-E-Q-C-O-N-T-R-O-L-"-F-r-e-q-u-e-n-c-y-"" Crystal
Switch Controlled By Accessory
Package
Not Installed
Not Installed
Installed
Installed
Installed
Equipment
Combination
ALLOWABLE OPERATING CONDITIONS
ating conditions are listed in the following chart.
After you are familiar with this information,
proceed to
Transmitter Operation.
Before proceeding to the Transmitter Operation
section, you should know the operating conditions
available using different combinations of equip-
ment and control settings. These allowable oper-
OPERATING CONDITIONS
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