Dynakit MArk IV Instructions For Assembling - Page 5

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(S). Connect the blue lead to pin #3 of

V3 (S). Connect the green lead to pin

#4 of V3.

Connect one end of a

10,000 ohm

(brown-black-orange) resistor to lug #5

of the five lug strip. Connect the other

end to lug #1 of the 10,000 ohm bias po-

tentiometer (S).

Connect the positive

(+)

end of the

selenium rectifier to lug #4 of the five

lug strip (S). Connect the negative (-)

end to lug #5 of the strip.

Connect the negative (-) end of a 50

mfd bias capacitor to lug #5 of the five

lug strip (S). Connect the positive

(+)

end to lug #3 of the strip.

Connect the positive

(+)

end of the

other 50 mfd bias capacitor to lug #3 of

the five lug strip. Connect the other end

to lug #2 of the 10,000 ohm bias poten-

tiometer.

Connect one end of a short piece of wire

to lug #2 of the five lug strip (S). Con-

nect the other end

to lug #3 of the strip.

If the amplifier is to be used with a Dy-

nakit PAM-1 (monophonic) preampli-

fier, this wire should be' omitted and lug

#2 soldered.

Connect one end of a

10,000 ohm

(brown-black-orange) resistor to lug #3

of the five lug strip

(S).

Connect the

other end

lug #1 of the strip.

Connect one end of a 4%" wire to lug

#1 of the five lug strip (S). Connect the

other end

lug #3 of the bias control

potentiometer (S).

Connect one end of a 2

wire to a

mounting lug (ground lug) of the filter

capacitor (S). Connect the other end to

solder lug at mounting screw of the five

lug strip.

8trip

Ih"

of insulation from each end of

a 5" wire.

Feed one end through pin

#8 of socket V2 (8) and connect to pin

(S).

Feed the other end through pin

#8 of socket V3 and connect to pin #I.

Connect one end of a 2" wire to pin # 1

of V3 (S). Connect the other end to pin

#8 of power takeoff socket (on front side

of chassis) (8).

Connect one end of the 13.5 ohm resistor

to pin #8 of V3 (8). Connect the other

end to ground lug of socket V3 (8).

SEE PICTORIAL.

Connect one end of a 3" wire to pin #8

of socket VI (8). Connect the other end

to lug #1 of the quad filter capacitor

(8) .

Connect one end of a 4" wire to lug #1

of the four screw terminal strip (8) .

(!>

(v)

Connect the other end

ground lug at

the five lug strip (S).

Twist together a pair of 5" wires and

connect one end of one to pin #2 of V2.

Connect the corresponding end of the

other

to pin #7 of V2. Connect one of

the other ends to pin #2 of V3, and con-

nect the last one to pin #7 of V3.

Twist together a 5

and a 4%" wire

so that one pair of ends are uneven.

Connect the even pair of ends to pins #1

(S) and #2 (S) of the power takeoff

socket. Connect the long end to pin #2

of V3 (S). Connect the remaining end

to pin #7 of V3 (S).

Connect one end of a 10 ohm (brown-

black-black) resistor to pin #3 of the

power takeoff socket

(8).

Connect the

other end to ground lug at that socket

(S) .

Connect one end of a 22,000 ohm resistor

( red-red-orange) to pin #5 of the power

takeoff socket (S). Connect the other

end to pin #4.

Connect one end of a 5%" wire to pin

#4 of the power takeoff socket

(8).

Con-

nect the other end to filter capacitor lug

#4. (See application notes if other than

DYNA preamp is to be used.) .

Mount the printed circuit board in the

cutout at the end of the chassis. Note

that the socket is located nearest the end

of the chassis. The board should be

mounted from the bottom of the chassis

with #4 screws, nuts, and lockwashers.

The eyelets on the printed circuit board

already have solder in them. Each eyelet

has a number which will be referred to in

the instructions. Before making a connec-

tion to the board, "tin" the stripped wire

be connected by heating with the sol-

dering iron and touching solder to it. To

solder to the eyelet, heat the eyelet with

the iron, insert the wire when the solder

in the eyelet flows, remove the iron and

allow a few seconds for the solder to set. .

Although the metal eyelet does protect

the printed wiring from overheating, a

small iron should be used to avoid exces-

sive heat on the printed circuit board.

Connect one end of a 2" wire to eyelet #1

of the circuit board (S). Connect the

other end to the ground (short) lug of

the inpu t socket (S).

Connect one end of a 2" wire to input

socket long lug (S). Connect the other

end

eyelet #2

(8).

Twist together a pair of 6" wires. Con-

nect one end to pin #2 of V2 (S). Con-

nect the other end to pin #7 (S). Connect

one of the other ends to eyelet #4 (S).

Connect the remaining end to eyelet #5

(8) .