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The bias trimmer has a small useable range of settings, and you want to set the bias trimmer near the middle of that range.  Fully clockwise or fully counter-clockwise means nothing will come out of the BBD.  So...

7) While playing your guitar, gradually turn the BBC bias trimmer clockwise until you hear an acceptable flanger effect.  Take note of the position of the trimmer setting.  Then continue turning the trimmer until the flanger sound goes away.  Take note of that second trimmer setting.  You want to set the trimmer half-way between those two extremes.

About this point, the bias trimmer have a initial position where the sound there is, but after, if I continue to turn clockwise there is sound until it is fully. There is not a point where no sound.

12AX7's are going for stupid money these days, so some alternatives would be the 12AV6 / 12AT6 / 6AV6 / 6AT6 / 12SQ7 / 6SQ7.  The -AT6 has a µ of 70 and the rest of the tubes have a µ of 100 and the -AV6 triode is identical to the triode in a 12AX7.  The other part of the tube is a pair of diodes which have a common cathode with the triode but plates that can be used as shunt diodes for a distortion or rectifiers for an envelope-based function.

The VCO and LFO are circuit blocks, not single components.

LM311 and Q3 are part of the VCO.

Two of the LM324 op-amps are part fo the LFO.

The LFO is a triangle/square  osciallator.  Google "triangle square oscillator" and you will see images of some examples.

Thank you for the answer Antonis !
I tried the changes of wiring that you proposed, but there is practically no sound coming out...
Just to be sure I understood you well for the changes, here is the actual wiring (not working) :


I have absolutely no clue how a 3PDT switch works. I was just following the instructions in the DIY link.
Do you have a schematic on how to wire it other way ? (or a link that explains how it works for noobs)

What do you call BJT ? (sorry : noob + french speaking makes it hard for me )

And for your second post : yes the pedal works fine with the wiring on the second picture. 

And thank's to both of you, I  will change the resistor to the initial 10k value or lower.

For the volume question, now that this first experiment works, I will look for a 2 knobs pedal that blends the dry and wet signal.

Glad I found this awesome forum with quick and gentle feedback, you rock !! 

Hey,

I'm trying to build a noise floor. According to this picture, all you have to do is remove 1 or 2 components.

http://s110.photobucket.com/user/workformom/media/vfmsmschematic.gif.html

I used this layout, and removed the 2.2M resistor and the second 100n cap.

http://2.bp.blogspot.com/-wSpZ4MUBr3Q/T4Sbh9xuBLI/AAAAAAAABOQ/ozISaI-4NG4/s1600/Effector+13+Soda+Meiser.png

When I take the components out, there is no sound. When I put them back, I get a functional Soda meiser. When I take out only the 2.2m resistor, I get lower gain and a lot of hiss. It doesn't sound like the demo.

Am I supposed to bridge the component locations or just take those components out?