Heathkit SB-401 - MICROPHONE CONNECTION; LMO ADJUSTMENT

Page 95
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( ) Return the FUNCTION switch to STBY,
( ) Set the METER switch to REL PWR,
! ( ) Install the 6CL6 driver tube (V9).
( ) Install a large tube shield on V9, By switcH
() Turn the FUNCTION switch to TRCV.
(_) Turn the MODE switch to CW.
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|
(_)
Key
the
Transmitter
and
readjust
the
Driver
plate
and
aoe
Spee
De
i grid coils for maximum relative power output on each WHITE
| band. Be sure the receiver and transmitter band ns
switches
are
always
set
on
the
same
band.
Oa
:(.)
Return
the
FUNCTION
switch
to
STBY.
fi
REMONE
SEL
BUT
47
OF
THE BRAIDED SHIELD.
—~.
.
UNBRAID
THE
1/4"
OF
SHIELD
i
AND
TWIST
THE
FINE
SHIELD
|
MICROPHONE
CONNECTION
eis
. PREPARE THE BLACK LEAD, RED LEAD, AND CLEAR
.
‘
:
OR
WHITE
SHIELDED
LEAD
AS
SHOWN,
TWIST
THE
FINE
NOTE:
Before
the
LMO
can
be
adjusted
with
an
WIRES
OF
EACH
LEAD
TOGETHER
AND
APPLY
A
THIN
‘Amateur Band receiver, a microphone must be Fant EM OF SOCDERSTONTHE’END:OF EACHILEAD:
, connected to the Transmitter, It is recommended
that a high impedance microphone that is
equipped )with a push-to-talk switch be used
with
this
Transmitter,
so
advantage
may
be
SLIP
THE
HOUSING
AND
SPRING
ON
THE
CABLE
taken
of
both
the
PTT
and
VOX
operation,
A
.
BEND
THE
BARE
END
OF
THE
BLACK
LEAD
AND
THE
SHIELD
2-pin
male
microphone
connector
(Amphenol
BACK
OVER
THE
SPRING
AND
SOLDER.
|
§0MC2M)
is
furnished
for
this
purpose,
"etki
eee
Figure 2-5 shows a typical microphone and its
‘connections, Install the microphone connector
er
DOCOOOCOS
SOLDER AUDIO
in the end of the cable as shown in the Figure, (SHIELD) (CLEAR OR WHITE}
‘Then connect the microphone to the MIC socket . PUSH THE CLEAR OR WHITE LEAD THROUGH PIN 1
i
AND
THE
RED
LEAD
THROUGH
PIN
2
OF
THE
CONNECTOR
‘on the Transmitter, BASE (NOTE NUMBERS INSIDE OF CONNECTOR BASE).
. SOLDER BOTH PINS FROM THE BOTTOM, THEN CUT OFF THE
LMO
ADJUSTMENT
|
Sse
WIRE.
() Set the controls on the SB-303 Receiver as follows:
LMO Dial 3.5 MHz*
BAND switch 3.5
j RF GAIN control Full clockwise
; AF GAIN control 1/4 clockwise
ANTENNA switch HF ? WIG) ASERSCREW. FAS TENGE PERO WITH HIE DIED CETRER
FUNCTION
switch
STBY
;
MODE USB Figure 2-5
|) Set the controls on the Transmitter as
_ follows: MODE CW
LMO Dial 3.5 MHz* FREQ CONTROL UNLOCKED
BAND switch 3.5 METER GRID
FUNCTION switch TRCV MIC/CW LEVEL COUNTERCLOCKWISE
Both slide rule and LMO dials at 0.