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Heathkit HD-1250 - Final Adjustment and Calibration

Heathkit HD-1250
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FINAL
ADJUSTMENT
NOTE: In the following steps,
you
will
make the
final
adjustment on the dial.
Perform
the steps
carefully,
as this will assure the accuracy of your instrument.
(
)
Turn the tuning dial fully clockwise.
(
)
Observe the
"50"
on the blue band
at
the
top,
outer edge of the dial. If
this mark is not directly under the hairline grid, perform the following
steps.
1.
Slightly
loosen the
setscrew in the
large
round knob.
2.
Turn the dial in the
desired direction, until
the blue band
"50"
is
directly
under the hairline.
3.
Tighten the
setscrew.
Refer to
Pictorial
7-1
(fold-out from Page 37)
for
the
following steps.
(
)
Cut a
3/4"
length
of foam
gasket.
(
)
Remove
the paper
backing
from one
side of the
3/4"
length
of foam
gasket
and press it in
place on the
bottom
portion
of the right
side panel.
Page
35
(
)
Remove the paper backing from the blue
and white label and press the
label
in
place on the bottom portion of
the right side panel. NOTE: Refer
to the numbers on
this label in any correspondence you have
with the
Heath Company
about your kit.
NOTE: Do not mount the right
side panel at this time.
m
GASKET
Detail 6-3A
0
Va
Ys
3
/a
1
(INCHES)
2 3
4
3/8 I 5/8 .
7/8
I
"A
'
'|
'
*
'
1'
1
1
J
'| 1
I
1
4-
O
5
1
(CM)
2
3
4
5 6 r a
a
10

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