[sdiy] Modified ASR working perfectly!

[David G. Dixon]

> How expensive is this thing to make?
> How long does it take to solder it up?

According to my layout file BOM, the cost of the board itself (based on my
database for part costs, and adding 25% overhead to that for taxes,
delivery, solder, wire, etc etc) is $28.  Nearly half of that cost is for
the two DG409s and the LF444.  Throw in five Neutrik jacks, three SPDT On-On
switches, and aluminum for the panel, and the cost for the entire unit
increases to $46.

Approximate times for board assembly:
 1 min: cut raw board (assuming access to a shop guillotine)
10 min: print and transfer pattern, correct errors with sharpie pen
10 min: etch board and clean up (assuming CuCl2/H2O2/HCl solution)
20 min: drill board (assuming a drill press and the right bits)
15 min: gather parts
10 min: make jumpers (assuming a bending guide, like broken protoboard)
30 min: stuff and solder (for me, anyway; I'm a very efficient solderer)
 5 min: wash board with alcohol and a toothbrush, rinse, dry
-------
Total time: approx. 100 minutes

Hence, with the etched and drilled board ready for stuffing, the total time
for board assembly is reduced to approx. one hour.

Preparing the panel would take another hour, probably.  There are only six
wires to hook up -- one panel ground, and five jacks -- so panel assembly
would only take about 15 minutes.

For a board of this magnitude, assuming I've precut the board to size at
work, I can typically complete the entire process, from printing to testing,
in a single evening after dinner.