Boss VB-2 LFO analysis?

[Geoff Hunter]

I hope you didn't get your BA6110 from Newark/MCM InOne.  They've been knowingly selling defective BA6110's for almost a year now.  If you've got batch code 420 178 you should send them back.

Thanks for the info... I got them from ebay from a company in Holland (something like engineersatwork.nl) on a whim...... I was going to try and see if you could use them in the VB-2, but you answered my question for me! Thanks!

[Processaurus]

http://www.buildyourownclone.com/ba6110.html

This explains how to substitute the BA662A with the more common and much less expensive BA6110.  The VCA is not something you can amputate from the circuit.  The LFO doesn't function properly without it.

The BA634 (IC6) can be done away with completely if you're gonna build it true-bypass.  It's just a SIP5 flip-flop.  The rotary switch can be replaced with a SPDT where the pole is connected to the same place as the pole of the second half of the rotary switch.  The "unlatch" throw would still connect to the same place.  The "latching" throw connects to ground.  The fisrt half of the rotary switch can be done away with completely including the "bypass" mode buffer.  Q11/LED can of course go too.

There are errors in the "roland" schematic.  The duplicate pin1 to ground of the BA662 should be pin5.  Pin 9 is shown going to +9v.  It really goes to +6v off the emitter of Q7, but will still work just the same with +9v.

Very cool, Keith.  Thanks for sharing your research with us.  I imagine figuring that stuff out took more time than one might think.

[puretube]

type BA662 into the search-field

[no one ever]

BYOC, where DID you source your semi's from?

[puretube]

anyone knows the min & max speed/rate frequencies of the VB-2 ?

[Seljer]

anyone knows the min & max speed/rate frequencies of the VB-2 ?

it says that it goes from 2hz to 15hz at the top of the schematic for the VB2 that was posted

[puretube]

wow THANX, Seljer!

after being @ "bossus" and "bossarea" after searching all VB2 threads here,
I even went to "www.byoc.xxx" by accident  (don`t ever go there, rated XXX  ),
coz I didn`t see it on the "revised" clone-schemo in the thread...

now you said it, I found those remarks in the "original" drawing
hidden under those windows-icons that appear on the "sized" screen - aarrghh...

THANX again!!!