COMPLETE Soldano SLO Overdrive

[Hexjibber]

This sounds great and I am total SLO fanboy so would love to see what's going on here. I realise there are some other SLO type projects out there, that recent tube based GTO project for one but apart from that this is the first time I've seen one actually from Soldano themselves. Some of the YT demos sound pretty sweet.

 

[Bucksears]

Bumping this one, hoping it's in the works.

 

[Rock'n me]

Isn't it about time to work not only on the thread in the project wish list but also on the build report thread ?
And, by the way, the Wampler Slostortion is also missing on the wih list. This is a bad mistake.

 

[caspercody]

Amy update on the Soldano SLO pedal?

 

[Robert]

The prototype should be here in about two weeks.

 

[caspercody]

Anyway to get a BOM?

 

[Robert]

I'll send it to you as soon as I export it to order parts.

Just keep in mind the PCB isn't verified yet so it's subject to change. I don't expect any problems, but things happen.

 

[caspercody]

Understood, thanks!!!!

 

[Bucksears]

 

[jjjimi84]

I have been dying for a SLO for a long time now and am really hoping to find some comparable pedal options.

 

[caspercody]

I really like the Victory pedal series. Finally a new preamp pedal design. I have not made the John (Jack) yet, but the Kraken and Sheriff are really nice.

 

[temol]

Just keep in mind the PCB isn't verified yet so it's subject to change. I don't expect any problems, but things happen.

You know we'll gladly test the schematic...

 

[Bucksears]

Admittedly this is a bit premature, but I"d love to know if there MIGHT possibly be an insertion point for a lower-gain (aka 'Crunch') mode. Or at the very least, a way to lower the overall gain. If that could be toggled with the stock value, it might provide a way to have Crunch and Lead modes.
That seems to be a common observation (or complaint?), that it's just way too much and players typically keep the drive below 12 o'clock.

 

[Robert]

I'll post the full schematic once it's verified, but in the meantime...

There are a pair of gain stages between the gain control and tone stack, I would assume you could play around with the gain of these stages to tame things a bit.

 

[lrgaraujo]

So many of these preamp/amp-simulation pedals use zener as clipping diodes (V1 pedals, tech 21, this one, the ampeg vh140 amp). Do you know why?

 

[Robert]

So many of these preamp/amp-simulation pedals use zener as clipping diodes (V1 pedals, tech 21, this one, the ampeg vh140 amp). Do you know why?

Using a pair of zener diodes arranged like above allows clipping at a higher threshold than standard switching diodes. In the above snippet the circuit will clip at around 6.2V in each direction (zener voltage + forward voltage). This would require around 20 diodes in series using standard silicon diodes with a forward voltage of 0.6V.

Zener diodes also have a slightly different knee compared to standard switching diodes (1N4148, 1N914, etc).

 

[lrgaraujo]

Using a pair of zener diodes arranged like above allows clipping at a higher threshold than standard switching diodes. In the above snippet the circuit will clip at around 6.2V in each direction (zener voltage + forward voltage). This would require around 20 diodes in series using standard silicon diodes with a forward voltage of 0.6V.

Zener diodes also have a slightly different knee compared to standard switching diodes (1N4148, 1N914, etc).

That's good to know! Will have to breadboard some gain stages with zeners to see how they sound

 

[ErickPulido]

I'll post the full schematic once it's verified, but in the meantime...

There are a pair of gain stages between the gain control and tone stack, I would assume you could play around with the gain of these stages to tame things a bit.


View attachment 43939

Can't wait to see the full schematic, awesome work man keep it up, I am still waiting for the KSR too lol

 

[angelrulax]

Gentlemen, start you soldering irons!!!

 

[Rock'n me]

The prototype should be here in about two weeks.

View attachment 43797

Hi Robert,
I especially like the deep switch.
Don't you want to dare to do really deep stuff in your craft room down in the basement?

 

[Rock'n me]

Can I get impatient now?