Page 1-145
16Q
2 4 W A I T
R E S I S T O R
®
�
-
6 ·
3 2 ,
1/1
"
5 C R E W
t
a
efer to Detail 12-1G and mount a #6 solder lug at
BN. Use 6-32 x 3/8 hardware.
R14. Refer to Detail 12-1H and mount the 16
Q2,
24-watt resistor at R14 with the raised boss toward
the chassis. Use 6-32
x
1/2" hardware
.
DO NOT
overtighten the screw as the resistor body can be
broken.
+2 u1
& :
<
s6
souse
tu¢
4
r
e
- a
I
.
4
6 · 3 2 ,
3
/8"
S C R E W
�
#
6 LOCKWA.SHE.R
L
@
6
-
3 2 N U T
Det!il 12-1H
two
#6
solder lugs at BK. Position the lugs
as
shown. Use 6-32 x 3/8" hardware.
Mount a
#6
solder lug at
BJ.
Use 6-32 x 3/8"
hardware.
NOTE: When hardware is called for in a step, only the screw
size will be given. For instance, if "6-32 x 3/8" hardvware" is
called for, it means that a 6-32x3/8" screw, one or more
#6
lockwashers, and a 6-32 nut should be used for each
mounting hole. The Detail referred to in the step will show
the proper number of lockwashers to use
.
\
Detail 12-1
F
f
o
llowing steps, handle the socket
insulators
: In the same manner, prepare the other transistor
socket I
nsulator and mount an MHT9210 transistor
and
a
transistor
socket at
01
.
( ) Use an ohmmeter to make a resistance reading from
each pin and from the body of each transistor to the
chassis. The ohmmeter should read infinitely high on
any
range.
If
i
t does
not, the transistor, the
socket,
and
the insulator should be remounted.
Squeeze an amount of thermal compound equal to a
small pea onto each side of a transistor socket
insulator
.
Spread the compound completely over both
sides of the insulator. Then, on the TOP side of the
chassis, place the insulator over the chassis holes at
02.
Make
sure the insulator holes are aligned with the
c
hassis
holes. WASH YOUR HANDS.
oa.
Rete to Detail 1 2 1 F and install an MHT921O
transistor (#417-162) on top of the chassis and a
transistor socket on the bottom of the chassis at 02.
Use 6-32 x 3/8" screws
in the tapped holes of the
sockets. Make sure the two shoulders around the
s96ket
holes fit int
o
the chassis holes
.
woe the
cess thermal compound from the
transist
NOTE: In
Summary of Contents for Heathkit SB-104A
Page 6: ...Page 1 4 C EEESEE...
Page 8: ...Page 1 6 C E IESE...
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