9
ASSEMBLY PROCEDURE
These instructions are presented in a simple, step by step sequence to make assembly and wiring of your
amplifier as easy as possible. Please take the time to read each step carefully before actually performing the work.
A space is provided to check off each operation and will be helpful in preventing omissions or errors. After
every 10 or 15 steps, stop and check your work to insure accuracy.
Note that in the pictorials, each component is identified by a code designation and in addition, each termi nal
has also been assigned a number. When the instructions read, “Connect a 100K
½
watt 10% resistor
(
brown-
black-yellow-silver from TB1-1
(
S
)
to TBl-35
(
NS
)
”, it means that the resistor is connected between terminals 1
and 35 on terminal board 1. The abbreviation
(
S
)
indicates that the connection should be soldered. The
abbreviation
(
NS
)
indicates that more than one component is connected to the same terminal and should not be
soldered in this operation.
Two types of hook-up wire are used in the assembly of this kit. One type has standard insulation and will be
used in all wiring unless otherwise specified. The other type wire has heavier insulation and is used in the B+ and
filament lines. The heavy insulation wire will be referred to in all instances as “HI”.
When wire lengths are specified, measure the length on the scale provided on the harness construction jig, In
general, the ends of most leads can be stripped back
⅜
˝ and any excess bare wire can be clipped off if necessary
after installation. The solid wire provided requires no pre-tinning. The stranded wire
(
transformer leads, etc.
)
should be twisted and tinned after stripping.
The amplifier is assembled and wired as four separate units:
Electrolytic Bracket
Harness
Terminal Boards
Main Chassis
As each assembly is completed, it should be checked and put aside for later installation. In this way, any
errors can be corrected before the construction of the kit has progressed to the final assembly.
The pictorials will facilitate the assembly, location, and wiring of the various component parts and should be
referred to at all times. It is suggested that the manual be read and the pictorials studied before starting con -
struction of your amplifier.
The mounting hardware supplied with this kit consists of the following:
1.
#4-40 screws, nuts, and lockwashers. These are the smallest screws supplied and are used to mount the
nine pin miniature sockets.
2.
#6-32 x
⅜
˝ screws, nuts, and lockwashers. These comprise most of the mounting hardware.
3.
1-#6-32 x
¾
˝ screw to mount the selenium rectifier.
4.
#10 nuts, lockwashers, and 3/32 thick flatwashers to mount the transformers.
5.
#8-32 x
⅜
˝ screws, nuts, and lockwashers to mount the choke. These are the thickest screws supplied.
RESISTOR HOLDING CARD
The cards on which the resistors and small capacitors are mounted may serve as a convenient holder during
construction. Remove the tape by peeling it free from the resistor leads, holding the body of the resistors down
to prevent them from being pulled out of the holder. Bend the card on the scored line until it forms a right angle
and then use a small piece of tape from the lacing tape roll to hold it in shape.
The card now serves as a pyramid base with the resistor leads pointing upward. This will facilitate identifi-
cation and selection of the components as the work progresses.
