[sdiy] Serge hole pattern

[Aaron Lanterman]

A while back, I bought a partially filled Serge panel from Mike Peak.  
It's got an PTO and wave multiplier and some custom hacked 1/4" to  
banana converters. I figured I should fill out the rest of a panel.  
The Cat Girl Synth PCBs I've been slowly building over the last couple  
of years should fit the bill nicely - their consistent height and thin  
width screams out to be put in a Serge format.

While I'm at it I also need to mount things decently. The PTO is the  
only one that was actually mounted to the front panel. The wave  
multiplier is just dangling, connected via the power wires to the PTO  
and - get this - with twisty ties. ;)

Definitely a kit build. :)

Anyway, I just spent some quality time with the actual panel and the  
ruler trying to puzzle out the weird hole format, which you can see  
here:

http://users.ece.gatech.edu/~lanterma/serge%20photos-Pages/Image5.html

Here are my findings, in case anyone wants to compare notes.

Panel is 17" wide, with 16 holes evenly spaced horizontally by 1"  
each, starting 1" from each edge. That's the easy part.

The vertical pattern is weird. Let me try to using letters, like this,  
turning the vertical into horizontal:

AB  C D E  FG   HI  J K L  MN

It looks like if you want 6 holes 1" apart, you can use B D F I K M.  
If you want 8 holes 3/4" inches apart,
you use A C E G H J L N.

I think B and M are each 1" from the edges. (The panel is 7" tall.)

I think the AB, FG, HI, and MN pairs are separated by 3/16".

I think the CD DE JK KL pairs are separated by 3/8".

The holes themselves are all 5/16".

The top of the top hole and bottom of the bottom hole appear to be  
3/4" away from the top and bottom of the panel, respectively.

I haven't done all the addition and subtraction needed to make sure  
all these measurements are consistent with one another, so reader  
beware. :)

- Aaron