[If the alternate (Japanese) transformer, part #454354, has
been supplied, invert the transformer on the right of your work
surface with its attached mounting screw studs facing up. Mount
the transformer on the right side of the chassis so that the holes
in the chassis engage the transformer studs. Feed all 9 leads
through the large center hole. Select four each large flat washers
and 1/4-20
KEP
nuts. Slide the transformer as far away from the
right side of the chassis as possible, slip a washer onto each screw
stud on the inside, and firmly secure the nuts.]
24( ) Select the
power
transformer, part #464023 (it has 14
leads connected to it), the choke, part #423355, and
the remaining four 3/4" 1/4-20 screws and
KEP
nuts,
and the last two flat washers. As before, invert the
transformer on your work surface. Mount the trans-
former on the left side, with the black, brown, orange,
yellow, green-yellow, black-white and orange-white
leads toward the
back
(inside) of the chassis. Ignore
the center hole. Insert a screw through each foot from
the outside, mount the choke on the inside over the
two screws on the left, slip washers over the two
screws on the right, see that no wires are trapped,
and firmly secure the nuts.
[If the alternate (Japanese) transformer, part #464017, has
been supplied, invert the transformer on the left with its mount-
ing screw studs facing up. Mount the transformer on the left side
so that the holes in the chassis engage the transformer studs.
Feed all 14 leads through the large center hole. Mount the choke
over the two studs on the left, slip washers over the screws on the
right, slide the transformer as far away from the left side of the
chassis as possible, and firmly secure with four KEP nuts.]
You may wish to work on the chassis with it placed ver-
tically before you, resting on the sides of the transformers.
Bend the transformer leads over the edge of the chassis to
get them out of the way until their connection is called for.
WIRING THE OUTPUT STAGE
1( ) Prepare
three
4" (10 cm) heavy yellow wires,
three
5 1/2" (14 cm) yellow wires,
one
4" (10 cm) black
wire, and
one
5 1/2
"
(14 cm) black wire. Remove 1/4
"
(.6 cm) of insulation from each end of the wires. Se-
lect one of the shorter and one of the longer yellow
wires, start with the wires even, and twist them uni-
formly together to within 1/2"
/
(1.3 cm) of the other
end of the shorter wire (the longer wire should be
about 1 1/2" [4 cm] longer than the short wire at this
end). These twisted pairs, as well as the other twisted
pairs in this kit, should be twisted uniformly 3 full
turns every 2" (5 cm). In a similar manner twist to-
gether the remaining two pairs of yellow wires, and
the pair of black wires.
2( ) Select one of the yellow twisted pairs, and connect
the 1 1/2"
longer wire to tube socket V2 pin #2 (S).
Connect the corresponding end of the other wire to
V2 pin #7 (S). Connect the free end of one wire to
V3 pin #2. Connect the remaining end to V3 pin #7.
3( ) Select another of the yellow twisted pairs, and con-
nect the 1 1/2
"
longer wire to V3 pin #2 (S-2).
Connect the corresponding end of the other wire to
V3 pin #7 (S-2). Connect a wire at the free end to
V4 pin #2. Connect the remaining end to V4 pin #7.
4( ) Select the remaining yellow pair, and connect the
1 1/2
"
longer wire to V4 pin #2 (S-2). Connect the
corresponding end of the other wire to V4 pin #7
(S-2). Connect a wire at the free end to V5 pin #2.
Connect the remaining end to V5 pin #7.
The leads connected to the power and output transformers
have been precut to approximately their correct lengths.
You may shorten them for neatness if you wish, but do not
cut them too short for use, as this may void the warranty.
5( ) Select the heavy green lead and the heavy violet lead
from the
power
transformer. Twist the leads uni-
formly together for neatness, and connect the green
lead to V5 pin #7. Connect the violet lead to V5
pin #2.
6( ) Select the black twisted pair, and connect the 1 1/2"
longer wire to V5 pin #7 (S-3). Connect the cor-
responding end of the other wire to V5 pin #2. We
suggest crimping these wires around the pins if the
pin holes are already filled with wires. Connect a wire
at the free end to TD-1 pin #1. Connect the remain-
ing end to TD-1 pin #6.
7( ) Prepare a 13 1/2
"
(34.5 cm) black wire. Connect one
end to V5 pin #2 (S-4). Now twist this wire twice
around the twisted pair from the previous step, and
then feed the free end through the grommeted hole
G3. The other end will be connected later.
Make certain that all of these twisted filament (heater)
wires are positioned against the chassis.
8( ) Prepare a 4" (10 cm) black wire, but remove 1/2
"
(1.3 cm) of insulation from each end, instead of the
conventional 1/4
"
(.6 cm). Feed one end through V2
pin #8 and connect it to V2 pin #1. Solder both pins.
Feed the other end through V3 pin #8, and connect
it to V3 pin #1.
9( ) Prepare a 4" (10 cm) black wire, but remove
1/2
"
(1.3 cm) of insulation from each end. Feed one
end through V4 pin #8, and connect it to V4 pin #1
(S). Feed the other end through V5 pin #8, and
connect it to V5 pin #1. Solder V5 pin #1 only.
Each lug of the 2- and 6-lug terminal strips T-l, T-2, T-3,
T-4 and T-5 has two holes, one at the tip, and the other at
the base through the insulating material. For ease of con-
nection, the steps involving these terminal strips will indi-
cate soldering to the
tip
or to the
base
of a lug on them. The
two holes will be soldered independently.
10( ) Prepare a 5 1/2" (14 cm) black wire, by removing the
conventional 1/4" (.6 cm) of insulation from each
end. Connect one end to V3 pin #1 (S-2). Connect
the other end to T-4 lug #1 at the
base
(S).
11( ) Prepare a 3 1/2" (9 cm) black wire. Connect one
end to V3 pin #8 (S-2). Connect the other end to
V4 pin #8 (S-2).
12( ) Select one of the 1,000 ohm, 1/2
watt resistors (brown-
black-red) , bend its leads 90° to its body, and cut its
leads to 1/2
"
(1-3 cm) each. Connect one lead to V2
pin #5 (S). Connect the other lead to V2 pin #6.
13( ) Select another 1,000 ohm, 1/2
watt resistor (brown-
black-red) , bend its leads 90° to its body, and cut its
leads to 1/2
"
(1.3 cm) each. Connect one lead to V3
pin #5 (S). Connect the other lead to V3 pin #6.
14( ) Select another 1,000 ohm, 1/2
watt resistor (brown-
black-red) , bend its leads 90° to its body, and cut its
leads to 1/2
"
(1.3 cm) each. Connect one lead to V4
pin #5 (S). Connect the other lead to V4 pin #6.
9
