Danelectro FAB Echo Mod idea

[CodeMonk]

I started working on this but so many other projects have kind of taken over.
I did the delay speed echo on my FAB Echo. A local guitar shop was so impressed with it, I'm modding them for him as well.

Anyway. What I would like to do is add a momentary switch to this pedal While still keeping the normal switch. No idea where I would physically put the switch yet, but that won't be a problem.

Just wondering if anyone has done this mod or have any pointers?

Thanks

[tommy.genes]

I've never looked at the FAB, but I have studied the DD-2/3 with respect to making this mod. I'll talk about what I found in hopes that it applies to your case.

The tricky - although not insurmountable - thing is that the DD-2/3 stock bypass mutes the signal coming out of the delay line before it goes into the output mixer. This means that any repeats are killed suddenly when the pedal is disengaged. While I could have added a momentary switch to the stock Boss bypass, that wouldn't have been very useful for what I wanted to do, and what I think you want to do too.

I wanted to be able to "inject" one or a few notes into the delay and have them continue to repeat while still playing with an otherwise clean sound. That would require selectively muting the signal going into the delay line, while always letting the output of the dealy line go to the output mixer. Rather than trying to do that within the confines of the DD-2/3 pedal, my plan is to eventually incorporate a dual latching/momentary switch scheme with an output mixer into an overall bypass pedal.

To summarize and generalize, note that, depending on the actual design of the FAB circuit, what you want may be more a bit more complex than just adding a momentary switch in parallel to the existing bypass circuit. It may involve essentially building a whole new bypass circuit around the stock pedal.

-- T. G. --

[earthtonesaudio]

I've done the mods for infinite repeats, more delay volume, and variable delay time. 

What do you want the momentary switch to do?  What Tommy said or something different?

[CodeMonk]

I've done the mods for infinite repeats, more delay volume, and variable delay time. 

What do you want the momentary switch to do?  What Tommy said or something different?

I've done those mods myself.
Listen to Rush's 2112, the first few minutes of it when you hear some delay in a few places.
Basically, he plays a 3 chord progression, the last chord which gets the delay effect. Then does more progressions, each with only the last of the chords getting the delay.

[earthtonesaudio]

Hm... Well, if you were willing to do a re-house of the pedal, I think it would be pretty straight forward.  When you have a long repeat going, you can turn the pedal off and back on and the delays will still be going, so that tells you that the output of the effect is always "on" and just the input is switched.

It sounds like you want to have repeats going from the delay, and then be able to play over the top of those repeats with no delay.  Is that right (I don't know that Rush song)?

Sounds like you want to have some "effect output" coming from the pedal's output at the same time as "dry signal."  I think something having to do with an output mixer would be heading in the right direction.  I'll have to think about it a little more.  I plan on re-housing my Fab Echo soon, and this seems like a mod I should do also. 

[ambulancevoice]

do you want the bypass switch still there, but to have another one as well???
like this???


so basically two bypass switches

(you do know that bypass switch is a momentary one right???)

or do you want a momentary switch to mute the pedal???

[earthtonesaudio]

I don't think that's what CodeMonk was asking for... that diagram is just showing how to add on true bypass switching with a 3PDT.

I think what he was talking about was the ability to allow repeats to keep coming through after you turn the effect off, and control that via a momentary switch.  Similar to the "tails" function on the Echo Base, if I'm not mistaken.

[ambulancevoice]

i was just talking about the momentary switch connections
not the true bypass stuff

[squ1nts]

I really want that schematic for adding a 3PDT to FAB effects series... Does anyone still have the larger visible file of it?     

[caspercody]

+1 on the schematic for adding a 3PDT to Danelectro pedals.