The Boss VB-2, it's alive!

[zeta55]

So, finaly I got my VB-2 clone working
I used the schematic with the BA6110 posted by byoc at http://www.diystompboxes.com/smfforum/index.php?topic=45067.0 Did my own layout for it.
Though it was a bit tricky bringing to life.
I missread the schematic on several places, wich had me debuging the circuit for some time (wrong values on resistors and caps).
For the TL022 in the LFO section I ended up with a TLC272 wich seems to be a good subsitute. It goes from 1.8 - 14hz. (Seems OK to me)
As for the extra transistor array preceeding the BA6110 I used 2N5087 and 5088 as suggested by byoc.
Though that did not bring the circuit to life, there was no modulation of the sound.
Finaly I put a 50K trimpot instead of R53(33K) connected between the BA6110 and the transistor array, tweaked it and yes, it's alive! I ended up with a resistance of 42K. It seems very sensetive to the right value.
Anyone else built one with the BA6110, did it work with the 33K R53?

Here's a small soundclip I've recorded http://media.putfile.com/Boss-VB-2

Now it just has to be boxed up. I'll post pictures when it's done


/Krister

[boogietube]

Nice one!! Congrats!!
Do you have a copy of your layout handy? I've been wanting to build one of these!
Sean

[zeta55]

Nice one!! Congrats!!
Do you have a copy of your layout handy? I've been wanting to build one of these!
Sean

Well, yes I do. But there's some corrections I have to make to it. As for now I've got some components missing in the layout
The layout is divided in two circuitboards, one for the signalpath and one for the modulation of it.
I'l be happy to post it later when it's a working one.

/Krister

[boogietube]

Cool ! Cool !!
Thanks!!
Sean

[caress]

buildyourownclone.com has a board + chip for pretty cheap and the build is really really easy...  plus there are pleeennty of fun mods you can add.
can you post your layout for it though?  i would love to make another without buying another board!



it's all the controls on the left half of the box + the top 2 big knobs.

[zeta55]

buildyourownclone.com has a board + chip for pretty cheap and the build is really really easy...  plus there are pleeennty of fun mods you can add.
can you post your layout for it though?  i would love to make another without buying another board!



it's all the controls on the left half of the box + the top 2 big knobs.

Thats some box you got there!

As I mentioned earlier I'll post the layout when it's a working one, thought I'd include the chorus mod in it also.

/Krister