Super Simple Blend circuit

[Geiri]

I've used the split n' blend circuit here on Tagboardeffects and it's great. However, I've tried it with a Keeley 4-knob comp and they don't get along at all so I looked for alternatives and found this little circuit that I did a layout from. I haven't tested it yet but will do tomorrow.



Here's the schematic:

[Silver Blues]

Nice one. Love how small it is.

[Dave]

Looks cool, excited to hear if it works.
Cheers
Dave

[Geiri]

I haven't tested it yet. I had to spend the whole day working on enclosures but I should test it tomorrow. I'll let you know how it works!

[ana konda]

Looks good Geiri!
I've used the split'n'blend with an old Laney reverb unit, and they don't play together that well, so hopefully this would work out.

[Geiri]

I'm trying this out right now. I noticed that the 4.7K resistor should span one row higher so I'm going to fix the layout and try it out.

[Beaker]

Takk fyrir Geiri, blend controls are great in bass pedals. I am building another ROG Ginger pedal at the moment, so I am going to fit this in as well.

[toddvirgil]

Geiri,

Did it work out for you? Working on a couple of blend projects right now...

[Geiri]

Oh yes it does work fine! However, don't use it with a Ross Compressor circuit (dynacomp, Keeley 4-knob) because that won't work. I've asked Mark to do a layout for a blend circuit that works with compressors.

Here's an updated and verified layout:

[toddvirgil]

Interesting, I wonder what it is about compressors... is it an impedance problem? Would adding a buffer do the trick? Thanks for the update!

[Geiri]

Hey mate, check the thread I made yesterday. It's a circuit that works with Ross compressor type circuits, it's also verified!

[IvIark]

Nice one matey, cheers for sharing.  And also for the Ross blender and DBD you did

[Dulouz]

If I wanted to use this as a clean blend in a Big Muff how would I wire it?

[Beaker]

The "send" wire goes to the Big Muff board input.

The "return" wire (from "blend"pot lug 1) goes to the Big Muff board output.

[Dulouz]

Thanks Beaker!

[Dulouz]

A couple more questions:

Will that set up make all the way counterclockwise completely clean, straight up 50/50 blend and all the way clockwise completely fuzz?

[rocket88]

it should be exactly as you exactly as you described, if not it would be all the way clockwise completely clean, and all the way counterclockwise completely fuzz.

[Dulouz]

Thanks Rocket!

You guys are the best!

[rocket88]

also, just a suggestion i don't now how if this will happen with this circuit, but the transistor choice for the split n' blend is very important. i used 2n5457's and i had major volume drop approaching and directly in the center, but once they were changed to 2n5458's it works like a charm. so if you notice that there's a volume drop with the sweep try different transistors.

glad to help man

[Dulouz]

Good to know!

I just went ahead and picked up some J201's, so I should be good. If not I'll be sure to try some others.

Thanks!