Author Topic: VERO layout  (Read 21850 times)

aron

VERO layout
« on: April 28, 2009, 04:44:14 AM »
Untested. Note cut traces under R2


Joe

Re: VERO layout
« Reply #1 on: May 02, 2009, 01:19:12 AM »
Layout looks alright here.


HOTTUBES

Re: VERO layout
« Reply #2 on: February 27, 2011, 12:17:04 AM »
What kind of circuit is this ?

blackcorvo

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Re: VERO layout
« Reply #3 on: February 27, 2011, 03:46:30 PM »
What kind of circuit is this ?

its a discrete op-amp. You connect it in place of a LM741/TL071 single op-amp chip.

---
Aron,
The only thing thats missing IMO is a trimpot in place of R1, so if you use germanium transistors for Q1 and Q2 or change D1 for other types (germanium or schottky), you can bias the circuit correctly. I've done that in protoboard (I even tried a Mosfet and a Darlington for Q3).

Hides-His-Eyes

Re: VERO layout
« Reply #4 on: February 27, 2011, 05:39:20 PM »
Germanium op-amp eh?

HOTTUBES

Re: VERO layout
« Reply #5 on: February 28, 2011, 04:31:07 PM »
Is there a benefit to building this , and using it in  place of a regular opamp ,in terms of sound quality ?

blackcorvo

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Re: VERO layout
« Reply #6 on: March 01, 2011, 01:03:56 AM »
Is there a benefit to building this , and using it in  place of a regular opamp ,in terms of sound quality ?


here's a post talking of how the circuit works, just some lines below this one on this forum's main page:

http://www.diystompboxes.com/smfforum/index.php?topic=79132.0

and I like this circuit because you can actually tweak the sound of your op-amp, instead of just changing it by another model and hope there's a difference in sound.

Just try it in a Distortion+ or Rat circuit, use a 25k trimpot in place of R1 (adjust it to get 1/2 Vcc in the "out" pointed in the picture), and play with the transistors.
Try different models of transistors (as I said before, you can use germaniums for Q1 and Q2, and a Mosfet for Q3, or whatever combo you want), different betas, different diodes (schottky, germanium, silicon, even try LEDs if you want!).

I don't know about you, but I LOVE to play around with these circuits.

mistahead

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Re: VERO layout
« Reply #7 on: April 27, 2011, 09:27:13 AM »
Has anyone done a vero layout for a dual varient of this?

If not I can probably work out enough to bash one together for the other newbies... just need to check over the op amp theory and work out the +/- In's lol  :icon_biggrin: