Wiring not true bypass

[msurdin]

Hey Guys

I was talking to a few people and I read the tech of bypass on geofex.
I want to wire my pedals without any true bypass. Like Cornish.
I had a long talk about how there is no tone loss because of the buffers before your guitar gets to the effect and then the output buffer...

So how would i wire something up so it wont have true bypass? I also need a led...

Thanks Guys

Matt

[R.G.]

"The Technology of Bypasses" also shows you how to do non-true bypasses with LEDs.

See the section where the input jack is connected to the effect input all the time and the output jack switches between the inputs and the effect output.

[msurdin]

It is this one? http://geofex.com/Article_Folders/bypass/bpdiag7.gif

Can I use a dpdt for this? How would I wire it up... i was looking around for a scetch or diagram... seems to be alot for true bypass

[R.G.]

Yes, that's the one I was thinking of.

There's actually another version. Imagine that the input jack only goes to the effect. But inside the effect, there is a buffer and the output of the buffer drives not only the rest of the effect, but also one terminal of the bypass switch. That hookup ensures that even the non-effect selection of the switch is buffered. This prevents multiple effects from loading down the signal even if they all have buffers. It's the system used in all Boss and Ibanez effects; the only difference is that the Boss/Ibanez effects use JFETs for switching, you'd use a section of a DPDT.

As to how to hook up wiring - read the stuff on poles and throws. Pick one pole and two throws to switch the signal, use the other to switch the LED.

[msurdin]

So lets say I have my effect and my buffer. I would wire one point to the board... board to the next board.. This would then be wired to the dpdt.



Anything like that? Now how would you recomend hooking the rest up?

Wiring this way with a buffer will keep my natural sound if I have a buffer before the effect?
Someone said It would but i just want to double check...

thanks

[msurdin]

So I'm kind of stuck with wiring this proper...and how to do the led with this...

Sorry for the crap drawling...

Thanks guys

Matt

[soulsonic]

This is how it's done:

http://www.aronnelson.com/gallery/v/soulsonic-fx/Buffered+Bypass.gif.html

[msurdin]

Couple questions..

For powering, If I just have a battery snap, I need to go to 2 boards and led do I just wire the 9v to 1 board and then jumper to the other board and led?

For the in I can still use a stereo to hook up the other batt wire?

And a question about the 3 grounds..
Do the 2 Sleves from both jacks get wired together?
Where does the wire from the dpdt get ground to? Can I just loop it to the remaining point on the dpdt?

Thanks

[soulsonic]

Yes, you can jumper all the power connections together.
Yes, you can use a stereo jack for the input to switch the battery on and off.
All the ground wires should go back to the Sleeve connection on the input jack, so that all the different ground wires connect together at one spot.

[msurdin]

Thanks so much!

I thought you were saying the buffer is after the effect though?

[soulsonic]

If you want to maintain the low impedance output when the effect is switched on, you need a second buffer after the effect, but that's only if the effect doesn't have a low impedance out naturally. Some do, some don't. A BOSS pedal does, a Fuzz Face does not. So the BOSS would not require the second buffer, but the Fuzz Face would.

[msurdin]

Would the effects board on that diagram just be wired into another buffer board and then the buffer would follow the same wire to the dpdt?

Does anything else change?

How would I split the output on this buffer? http://www.generalguitargadgets.com/pdf/ggg_ic_buffer.pdf

[soulsonic]

Yes, the buffer would follow the same wire.

Nothing else would change.

Just connect the two wires to the same output of the buffer - nothing else needs done.

[msurdin]

You were saying that if its in a big pedal board like pete makes i would just remove the front buffer. So would I just remove the first buffer on this diagram and connect the 2 wires to the tip?

[soulsonic]

No, what I was saying is that you'd only need that one front buffer for the whole board - not for each effect - one still needs to be there otherwise the whole buffered bypass system won't work correctly.

[msurdin]

Ok so still wire everything like the diagram. And also have a buffer at the in of the board. Should I put a buffer at the out?

And for an effects loop just remove the effects board in the diagram and put my jacks?

I also have 1 effect i am working on its 2 boards and a dpdt toggle switch... Just replace the board and wire the switch in ? I have the top 2 for 1 board, middle 2 for in and out, and bottom 2 for the other board...

thanks