Transferring the Template / Layout to the Raw G10 Board
Step 1
– Find the template in the back of this manual and cut the template from the page.
Step 2
– Lay this full scale template into the chassis to make sure the mounting holes on the
template line up with the stand-offs mounted in the chassis. Adjust and mark the location of
the mounting holes on the template as needed.
Step 3
– Lay the full scale template over the G10 board and tape into place.
Step 4
– With a sharp tool (an automatic center punch is perfect for this), make a mark
through the template at each drill point, leaving a slight mark into the board.
Step 5
– Once all the marks have been created, remove the template and place to the side
for future reference. Before moving on, read the “caution” above regarding marking the turret
board. I cannot stress enough the importance of this action (I've ruined lots of boards!).
Drilling Holes in the Board for Turrets, Wiring, and Mounting
6.2
6.1
This turret board has been designed for either a 12AX7 or an EF86 normal channel preamp
tube. The below description covers wiring the turret board for the 12AX7 tube. Refer to
“Cool Modifications”, Chapter 11 for the requirements for installing the EF86.
MOD
CAUTION
TubeDepot.com 31
NOTE
The two methods of building a turret board are 1) the press fit method, and 2) the swaging
method. For a thorough explanation, see the booklet “How to Make a Top Quality Turret
Board” at
http://site.tubedepot.com/pdf/turret_boards_v1.pdf
.
As well, view the two videos,”How to Build a Turret Board, pt. 1 – Press Fitting” -
http://www.youtube.com/watch?v=eVSjj3S6nsU
; and “How to Build a Turret Board, pt. 2 –
Swage Fitting” - http://www.youtube.com/watch?v=iYtQC4UBysE.
Some printers may automatically reduce the size of the template when printing. Always
physically measure the printed template to insure proper scale is maintained.
Turret Board Assembly
6
CAUTION
There are three hole sizes to be drilled in this board. Refer to the template to insure the
correct holes are drilled in the correct spots. To reduce unrepairable errors, I recommend
drilling the smallest hole size first and then the following two sizes. It is always easier to
make a hole larger than smaller.
Depending on the mounting method you choose to install the turrets, use either the #43
drill bit (for press fitting) or the 3/32” drill bit (for the swage fitting). Refer to the booklet
“How to Make a Top Quality Turret Board” (
http://site.tubedepot.com/pdf/turret_boards_v1.pdf
) to decide which method is best for you.
NOTE
During all drilling and cutting operations, it is important to wear proper eye protection
and follow appropriate safety rules.
WARNING
With a grease pen or permanent marker, put a mark on the side of the turret board that
will receive the turrets. This will insure that the turrets aren't installed on the wrong side.
CAUTION
