stewmac.com
10
© 2018 StewMac
STEP 6
Glue the tube placement chart
Cut out the tube replacement chart
on page 35 . Put a thin coat of glue or
contact cement on the back and glue
it to the inside wall of the cabinet .
STEP 7
Optional copper shielding
If you prefer extra shielding on your
amp, apply copper shielding tape
(item #0028) on the top back panel,
covering the exposed wood . This
helps shield the circuit from unwant-
ed interference caused by other
electrical devices .
Because this tape’s adhesive will be
subjected to heat from the tubes, it’s
a good idea to staple the corners to
the wood panel .
STEP 5
Install the speaker
Remove the nuts from the four
speaker mounting screws . Carefully
slide the speaker onto the mounting
screws until it’s flush with the front
panel .
Install the four speaker mounting
nuts so they’re lightly touching the
speaker frame .
Do not tighten the nuts in a circular
pattern around the speaker, because
this can warp the speaker frame .
Instead tighten one nut with a quarter
turn so it’s just snug, then do the same
to the opposite side . Then snug the
third nut and fourth . Repeat this criss-
cross pattern of quarter-turns until all
four nuts have had one full turn . This
will give proper tension to compress
the speaker gasket . Overtightening
can warp the frame, damage the cone,
and cause unwanted distortion .
STEP 4
Solder the speaker plug
Push the insulation back 3/8" at the
other end of the leads . Insert the
white positive lead into the center
post of the speaker plug until it reach-
es the tip . Solder this lead in place by
heating the tip and feeding solder
through the small hole at the end of
the tip . Give the solder time to cool
before soldering the negative lead .
Use wire cutters to trim the black
negative lead so its end lines up with
the edge of the speaker plug’s cup .
Solder it to the outside of the cup as
shown above .
Don’t leave any solder on the outside
of the plug tip, or it won’t fit into the
jack .
This criss-cross pattern
keeps the speaker frame
flat
against the cabinet.
Tightening in a circular
pattern makes it
warp
.
Prepping the cabinet
’57 MINI TWEED
5W
O R I G I N A L 5 F 1 C I R C U I T
StewMac
®
I C O N
K I T S
Use only 1-amp slow-blow fuse.
DANGER:
Unplug the amp before changing tubes.
Tube locations from left to right:
5Y3
6V6
12AX7
5Y3
6V6
12AX7
(ECC83S)
Speaker
jack
Содержание 57 MINI TWEED
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