[sdiy] JH FS-1A Frequency Shifter Project update

[JH.]

Time for an update on the Frequency Shifter project.

I finally found the time to draw schematics for the main board of the FS-1A 
(second board will follow), and I have also created a second version of the 
component overlay, which shows the reference designators instead of the 
component values.

A few people have adressed me about this: That printing component values 
makes soldering the board easier, but debugging more difficult.
And I learned the hard way that it also makes a description of adjustment 
procedures so much more difficult. (I've started adjustment descriptions on 
my FS-1A page, and had to use a lot of screenshots.)

So, my solution for this, and all future projects is this:

(1) Silkscreened on the board will be the component values, just as before. 
It makes it so much easier to put the right components on board for 
soldering them. And when the components are soldered in, most of these 
labels will not be visible anymore, anyway, as they are now beneath the 
components.

(2) In addition to this, I'll provide a PDF with the board layout, using 
reference designators. You print this on paper, and have it available when 
you're working on your board for adjustments or debugging.

See my updated FS-1A page for details:
http://www.jhaible.heim.at/fs1a/fs1a.html

JH.