Print Page - Axess BS-2 Vero to Schematic

Title: Axess BS-2 Vero to Schematic
Post by: aviherman5 on September 17, 2021, 05:29:58 PM

Hi all,

I have this Vero for the Axess BS-2 which is a super cool buffer used by EVH himself. I was going to put a higher resistance pot in it in order to get a boost.

I want to make a PCB for this but, alas, don't have a schematic. Does anybody have one?

If anyone wants to draw one up, I wouldn't complain hahahahaha

Thanks for your help!

(https://i.postimg.cc/VdRLtbhP/Axess-BS-2-Buffer.png) (https://postimg.cc/VdRLtbhP)

Title: Re: Axess BS-2 Vero to Schematic
Post by: aviherman5 on September 17, 2021, 06:29:26 PM

Any chance this is right? Just drew it up :icon_lol:
(https://i.postimg.cc/pmkf4XLM/IMG-3264.jpg) (https://postimg.cc/pmkf4XLM)

Title: Re: Axess BS-2 Vero to Schematic
Post by: Rob Strand on September 17, 2021, 06:43:08 PM

It was quicker to draw than for me to find an on-line schematic which showed all the right elements (frustrating).

There's a 22pF from the opamp + input to ground.

Basically a non-inverting preamp driven from +/- 9V. Very small amount of gain, 1k feedback R and 4.75k to ground.

Title: Re: Axess BS-2 Vero to Schematic
Post by: MikeA on September 17, 2021, 08:55:39 PM

Here you go.
(https://i.postimg.cc/JHydxYwv/Axess-Buffer-schematic.jpg) (https://postimg.cc/JHydxYwv)

It also works well with a switchable boost at the end, using the other half of the op amp, the response is still quite flat.

(https://i.postimg.cc/tZDHwMMg/Axess-BS-2-no-splitter-plus-boost.png) (https://postimg.cc/tZDHwMMg)

Title: Re: Axess BS-2 Vero to Schematic
Post by: aviherman5 on September 18, 2021, 10:00:00 PM

Amazing! Thanks everyone for your help!

DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: aviherman5 on September 17, 2021, 05:29:58 PM