true bypassing a DOD FX96

Started by liddokun, August 18, 2009, 09:05:21 PM

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liddokun

I've got a DOD FX96 analog delay. While I really like the delay, I find in bypass I lose some high end.
So I want to rehouse it and true bypass it. Only problem is that I'm not experienced with removing the FET switching systems yet.
I was wondering if someone could help me?
Here's the schematic...
http://www.schematicheaven.com/effects/dodfx96_echo.pdf

Is the switching system common to that of the Boss pedals?
Can someone give me a hand and tell me how to wire it so that it's always on, so that I can use a 3pdt switch for true bypass?

To those about to rock, we salute you.

liddokun

To those about to rock, we salute you.

newfish

I'd say make a true bypass looper.  Saves you a lot of time, and lets you experiment with more sounds at a later date.

I have my delay and pitch shifter on a looper - and it's really useful to be able to kick them both in at once.
Happiness is a warm etchant bath.

liddokun

But I'm rehousing it anyways, which is why I want to true bypass it. The looper box is just another enclosure on my board taking up space, and I barely use 2 effects at the same time.
To those about to rock, we salute you.

dschwartz

why dont you first try removing C44 (in the schem you posted), it´s a 1.5nF cap before the buffer, probably cutting highs a lot.. try removing or lowering it.
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liddokun

#5
I actually like the way the delay sounds, just there's a bit of loss of high end in bypass mode.
I did a search about DOD switching and it seems they use the 4007 chip for switching. I'm going to do some reading and see what I can figure out.

I guess I could probe the circuit to find out where the input and output are, and then just bypass the switching and buffer altogether, although, I'm not sure this is the correct way to go about doing things. Maybe hotwire it to always be on?
To those about to rock, we salute you.

liddokun

Ok, I've figured out how to do it. Another forum member was kind enough to help me out through pm's. If anyone would like to know, pm me!
To those about to rock, we salute you.