Heathkit HW-12 - Page 43

TS a a a ae aac cea TI TT
Ae ae sn -
ip ee
LT ALLE IATL ESL LE EAT AIS A eR SE TES
ee
f
HHATHEEIT
—
3. Adjust the top slug of Tl for a maximum
signal indication, This should take only a
very slight turn of the slug, If the slug is
turned down too far, a larger, but false,
peak will appear.
4, Again, adjust the CARRIER NULL control
enal inctas
for a minimum signal indication,
NOTE: The signal level should now become
quite low, and if a VTVM and RF probe are
being used, the probe should be connected to the
center pin (pin 2) of the ANT socket,
5. Now adjust the bottom siug of Ti back up
into the transformer, As the slug is ad-
justed, there will be a dip to a minimum
indication, Adjust the slug for the mini-
mum (dip) indication,
6. Readjust the CARRIER NULL control and the
Before installing the Transceiver in the cabinet,
determine whether it will be used for fixed
station or mobile operation, or both, For fixed
station use only, perform the steps under Fixed
Station Installation; for mobile use only, ber-
form the steps under Mobile Installation, If you
plan to use the Transceiver alternately in fixed
station and mobile installations. perform the
HF YA AER U ANSEL pe.
steps in both sections.
Refer to Pictorial 20 for the following steps.
NOTE: If a microphone clip is to be used
(supplied with your microphone), it may be
installed on either end of the cabinet, so
10-32
THUMBNUT
10-32
SHOULDER
SPACER
/
PICTORIAL 20 a
10 a a on
[°s #10 LOCKWASHER
ine :) NUT
# 6 LOCKWASHER
Ca t
bottom slug of transformer T1 for the
lowest possible minimum signal indication,
The adjustments are now quite critical:
turn them slowly, Repeat this adjustment
until the best null is obtained,
7, Disconnect the test meter from the Trans-
ceiver and if used, the wire connected
between
lug
2
of
the
MIC
socket
and
the
chassis,
8. Turn the FUNCTION switch to TUNE and
the Meter switch to OPERATE TUNE.
9. Adjust the TUNE LEVEL control to in-
crease the meter reading to an S3 to S6
indication.
DRIVER TUNING
The driver tuning coils are preset at the factory,
the micronhone can he lifted um and o1
2
so the microphone can be pulled toward the
front and out, Use 6-32 x 1/4" screws, #6
lockwashers, and 6-32 nuts to mount the micro-
phone clip,
FIXED STATION INSTALLATION
(V) Install the medium rubber feet at the rear
holes in the bottom of the cabinet, using
6-32 x 3/8" screws, #8 flat metal washers,
#6 lockwashers, and 6-32 nuts,
( vi Install large rubber feet at the front holes
in the bottom of the cabinet, using 6-32 x
1" screws, #6 lockwashers, and 6-32 nuts,
OPTIONAL
LOCATION
FOR MIC
CLIP
§ LOCKWA
Bess
a
ae
eee LARGO RUGGER FOO
6-32 XI" SCREW
li