Installing the Output Transformer
Step 1
– Twist the blue, red, and brown wires tightly together.
Step 2
– Twist the black, yellow, green, and orange wires together.
Step 3
– Place the output transformer on the chassis and feed the red,
blue, and brown wire bundle through the chassis mounted grommet
nearest the power transformer.
Step 4
– Feed the black, yellow, green, and orange wires through the
chassis mounted grommet on the opposite side of the output
transformer.
Step 5
– Mount the output transformer to the chassis with the two 8-32 x
3/8” screws and two #8 KEPS nuts.
Installing the Capacitor and Capacitor Clamp
Step 1
– Prior to chassis installation, loosely tighten the clamp to the
can capacitor.
Step 2
– Install the cap clamp assembly to the chassis with the
clamp adjustment screw placed nearest the power transformer (photo 5.5a).
Step 3
– Secure the clamp to the chassis with two 6-32 x 3/8” screw and two #6 KEPS nuts.
Step 4
– Turn the chassis over and rotate the cap in the clamp until the common terminal is
inline with the solder terminal (photo 5.5b).
Step 5
– Turn the chassis back over and firmly tighten the can capacitor in the clamp.
Installing the Shock Mounted V1 Preamp Tube
Step 1
– With a 1/4” drill bit, enlarge the two V1 tube socket mounting
holes in the chassis. Deburr any rough edges.
Step 2
– Insert the two 1/4” grommets in these holes, making sure they
are properly seated in the chassis.
Step 3
– Prior to mounting the preamp tube sockets, slightly bend the
terminals 1 - 3 and 6 – 9 outward of the tube socket (photo 5.6a).
Step 4
– Carefully bend terminals 4 and 5 together. The holes of these terminals should meet
close to each other (photo 5.6a).
Step 5
– To provide a flat surface for the mounting screws, use a pair of needle nose pliers to
carefully bend the edges of the shield near the screw mounting holes inward toward the
socket (photo 5.6b, c, and d).
Step 6
- Insert the tube socket from the outside of the chassis and rotate the socket so that
pin 6 of the tube is closest to the chassis edge / corner.
Step 7
– Mount the tube socket with two 6-32 x 3/8” screws (photo 5.6e).
5.4
5.5
photo 5.5b
TubeDepot.com 13
5.6
photo 5.5a
photo 5.6a
The terminals of these sockets are very fragile and will easily break if bent too far. It is
recommended to use needle nose pliers for better control when bending these terminals.
CAUTION
For the EF86 mod, do not bend terminals 4 and 5 together in Step 4. Refer to Chapter 11,
“Cool Modifications” for more information.
MOD
