Low pass preamp for bass

[Domin]

Is there anyone who can make better layout with onboard pots? Or some better placement for wiring them?

We *could*, but then you'd never get any practice, and you'd never improve.

Start by placing the pots where you want them on the board, then put the IC on, then do the power, and only then route the other stuff.

I tried but it would have a lot of jumpers But ill give it a try, other were worse than what i posted here

[Domin]

Is there anyone who can make better layout with onboard pots? Or some better placement for wiring them?

We *could*, but then you'd never get any practice, and you'd never improve.

Start by placing the pots where you want them on the board, then put the IC on, then do the power, and only then route the other stuff.

I tried but it had a lot of jumpers Best is what i posted here

[ElectricDruid]

If you're trying to do it as a single-sided board for etching yourself, then it's going to need a few jumpers, so don't worry about it. Trying to completely avoid them usually means twisting things around in a such a way (and routing long tracks all over the board) that it makes the layout worse, not better. Get the component layout nice and tidy and don't cramp things up.

If you're doing a board for a prototype PCB place to make for you, do it double-sided. Something like that would be a nice little thing to start with and you should be able to do a decent job. These days, there's no real advantage to doing a single-sided board. Everything below four layers is so basic for PCB fab places these days, they regard it all as stone-age tech!

[Domin]

If you're trying to do it as a single-sided board for etching yourself, then it's going to need a few jumpers, so don't worry about it. Trying to completely avoid them usually means twisting things around in a such a way (and routing long tracks all over the board) that it makes the layout worse, not better. Get the component layout nice and tidy and don't cramp things up.

If you're doing a board for a prototype PCB place to make for you, do it double-sided. Something like that would be a nice little thing to start with and you should be able to do a decent job. These days, there's no real advantage to doing a single-sided board. Everything below four layers is so basic for PCB fab places these days, they regard it all as stone-age tech!

I did a lot of boards, prototyped or etched but this one gives me a headache 

[Domin]

If you're trying to do it as a single-sided board for etching yourself, then it's going to need a few jumpers, so don't worry about it. Trying to completely avoid them usually means twisting things around in a such a way (and routing long tracks all over the board) that it makes the layout worse, not better. Get the component layout nice and tidy and don't cramp things up.

If you're doing a board for a prototype PCB place to make for you, do it double-sided. Something like that would be a nice little thing to start with and you should be able to do a decent job. These days, there's no real advantage to doing a single-sided board. Everything below four layers is so basic for PCB fab places these days, they regard it all as stone-age tech!

New one, probably best placement i could do, opinion?

[ElectricDruid]

New one, probably best placement i could do, opinion?

Nothing like.

Everything is over to the left. All the resistors are squashed up into 0.3" spacing. 0.4" is a lot more comfortable.
Move the IC a couple of squares (0.2") over to the right and re-do it. It'll have more space and be more balanced.
The current layout has lotsof stuff on the left and almos nothing except a few capacitors on the right. It needs to be more-or-less equal between the two sides.
HTH

[Domin]

New one, probably best placement i could do, opinion?

Nothing like.

Everything is over to the left. All the resistors are squashed up into 0.3" spacing. 0.4" is a lot more comfortable.
Move the IC a couple of squares (0.2") over to the right and re-do it. It'll have more space and be more balanced.
The current layout has lotsof stuff on the left and almos nothing except a few capacitors on the right. It needs to be more-or-less equal between the two sides.
HTH

Something like that?

[ElectricDruid]

Something like that?

Yeah, that's getting better, don't you think?

[Domin]

Something like that?

Yeah, that's getting better, don't you think?

I think its too big now

[ElectricDruid]

Something like that?

Yeah, that's getting better, don't you think?

I think its too big now

So squash it up a bit. There's still plenty of space.
The caps along the top could go up one. The 47Ks and the electros at the bottom could go up one. The five components on the left should *definitely* go up one, so they're directly below the 6K8s. Once you've done all that, I think you could move the IC and almost everything up one.

Making it less wide is harder, but if you move that 470K one to the right, the blue trace wouldn't have to go all the way around the outside. And the track to the 6K8 could come under the pot like the other one does. You can't get it narrower than that without moving the pots closer together.

You could probably move the big electros at the bottom up and to the right a bit so they don't do down below the 47Ks. Then you could eliminate more rows off the bottom.

[antonis]

No trace proximity issues..??

[Domin]

No trace proximity issues..??

I can change it, no problem

[fryingpan]

Are they that big of a problem? Over half a millimetre should be enough after all at audio frequencies. And parasitic effects can and should be dealt with through filtering, I think.

[antonis]

Are they that big of a problem?

Not for me..

[Domin]

Made this preamp with some mods but im not much satisfied with results, i hoped for something better and switch somehow doesnt work

[Domin]