Splitter

[coxter]

Hi I'm trying to make a signal splitter so that one guitar gets outputed into two different pedals(driving two different amps) at the same time.

But I realised that just simple connecting two jacks to one, aint gona work. The sound gets muddy. How do I actually go about it?

Is this situation know as "signal loading" ? I'm not really sure about it, but i can can faintly deduce that its got something to do with impedance.

How do i go about with this?

[BoostAddict]

Thanks for trying
I was thinking about trying this cuz I've some some Y boxes go for so much.  I thought you can just put 2 jacks to one but I guess you can't.

[grapefruit]

You could use this circuit...

http://www.runoffgroove.com/splitter-blend.html

Just use the U1A and U1B sections and the Vref section. You really only need one op amp and use a 1k resistor between the op amp output and each output socket, but if the two way splitter is all you have in the pedal you may as well use a dual op amp as shown in the circuit above.

If you're going into two different amps you may have ground loop problems and have to use transformers on the output of the splitter. If you search you will find.

Yes, it has everything to do with impedance. If you're running into two pedals of the same type the input impedance is halved compared to going into one pedal.

Cheers,
Stew.

[coxter]

Thanx a mil, grapefruit.

pardon my noobness, I can identify circuits but can't really pin-point the specifics.

So the U1a and U1b sections are the buffers? Are they of unity gain?

I checked out Don Tillermans JFET pre-amp, can i just use it this way too?

i.e.   guitar ->split to two pre-amps.

[moosapotamus]

Check oout GEOFEX... Here's what you want...

http://www.geofex.com/FX_images/splitter.gif

The extra circuitry inside the dashed line for switching the power on/off with only the input plug is just one option for handling the power supply. You could just as easily use a DPDT toggle to switch the two batteries. Or, you could also probably use a MAX1044 to get the bipolar supply...

http://www.geofex.com/circuits/+9_to_-9.htm

Going with the MAX1044 would also allow you to power it with a normal 9VDC wall wart.

~ Charlie