Multi Rat

[jimilee]

So, I came up with this. Any thoughts?

 

[fig]

Nice clipping array! I'm still working on my breadboard version...I even thought about wiring an opamp selection between LM308 and OP07 (lots of jumpers....it's not pretty)

 

[thesmokingman]

you'll want series resistance on the ruetz mod or you're going to have a bad time when the pot is 0R

remember that those resistors don't just form a second order filter, they also set gain ... you'll end up with something closer to the forbidden setting on the expandora if you keep it as-is which ... maybe you want but probably not

 

[jimilee]

you'll want series resistance on the ruetz mod or you're going to have a bad time when the pot is 0R

remember that those resistors don't just form a second order filter, they also set gain ... you'll end up with something closer to the forbidden setting on the expandora if you keep it as-is which ... maybe you want but probably not

Thank you sir, you make a good point.

 

[jimilee]

Nice clipping array! I'm still working on my breadboard version...I even thought about wiring an opamp selection between LM308 and OP07 (lots of jumpers....it's not pretty)

I bet not. Rats nest pretty quickly.

 

[JamieJ]

This is awesome. I might give this a go when you get it verified. That hard clipping selection section looks cool to play around with.

 

[jimilee]

This is awesome. I might give this a go when you get it verified. That hard clipping selection section looks cool to play around with.

Sounds good. I don’t see it being a problem. I’m gonna order some boards and see how it sounds.

 

[fig]

MOFSET+LED is one I have not tried.

 

[jimilee]

MOFSET+LED is one I have not tried.

Read about it on diysb. If it sounds bad, I can always put a GE or something else. Really, we can put any diode anywhere in the selector path.

 

[jimilee]

Ordered some through Elecrow, should be here 8-11 days it said. Normally, I use JLCPCB, but the slowest shipping is almost a month, but it's about half the price. I laid out a Hizumitas and ordered it too.

 

[jimilee]

Not completely symmetrical, but not too bad either.

 

[JamieJ]

Looks awesome @jimilee

 

[temol]

Some of the tracks are very close to each other or to the solder pads. Is it auto-routed board?

 

[Bricksnbeatles]

It looks awesome, but I’d personally do a 1p12t rotary, and add some additional clipping modes, just because excess is fun. Probably some schottky clipping, as well as assymetrical LED clipping, some other weirder option, and also no-clipping.

 

[jimilee]

It looks awesome, but I’d personally do a 1p12t rotary, and add some additional clipping modes, just because excess is fun. Probably some schottky clipping, as well as assymetrical LED clipping, some other weirder option, and also no-clipping.

I had a helluva time coming up with more than just five. Position 8 is no diode. Then either just the feedback loop or nothing but the opamp can be chosen. The roadkill rat has diodes in the feedback loop. I laid out one of those with hard clipping diode options also. It sounds killer IMHO.

 

[Bricksnbeatles]

I had a helluva time coming up with more than just five. Position 8 is no diode. Then either just the feedback loop or nothing but the opamp can be chosen. The roadkill rat has diodes in the feedback loop. I laid out one of those with hard clipping diode options also. It sounds killer IMHO.

Oh, no doubt about it— 8 is more than enough! I just like overdoing things haha

I’m not typically a rat fan, but I’m very much looking forward to seeing this in action!

 

[music6000]

MOFSET+LED is one I have not tried.

What about out of spec J201 & LED??????????????

 

[jimilee]

There are more than enough slots to mix and match, you don't gotta follow the BOM, it's DIY!

 

[jimilee]

Oh, no doubt about it— 8 is more than enough! I just like overdoing things haha

I’m not typically a rat fan, but I’m very much looking forward to seeing this in action!

Me too, I was looking for one, but nobody makes one. The JHS thing is a multi, but not more than a couple of clipping options.

 

[jimilee]

What about out of spec J201 & LED??????????????

LED and a Potato, I think sounds like an idea. Maybe a small Rusett.