DOD FX25 with Send/Return

[zemauno]

Hi Folks!

I'm a huge fan of the DOD FX25 envelope filter and a few months ago i decided to built it.
I used this layout that include the BP/LP mode switch, volume pot. (to adjust the volume difference between BP and LP mode), decay pot.

http://vulcanofx.blogspot.com/2013/10/dod-fx25.html

The only change i made is R24=47k (as suggested by Mark Hammer, Thank you!!) for an even wider range of decay times.
I built the layout with values for bass and it works very well.

Some days ago i asked Fancy Limes (Thank you Andy L.!!) to help me understand how to include a send/return pach to the veroboard.

This is the change that needs to be made:

http://www.mediafire.com/convkey/2b53/ilfvuxv2ej9fl3pzg.jpg

The drawing shows a send for the buffered input and return into the envelope follower (as Andy explain me, this is good if you need to insert something like Tremolo, Volume pedal, ecc but not overdrive/distortion/fuzz).

I have marked with A and B the cables that must be switched (A goes to B and B goes to A) in order to have a send for the buffered input and return into the filter (ok for overdrive/distortion/fuzz).
As you can see, is a very simple mod.

It's works great!

Here are some photos of the pedal (yes, my 3 yo daughter is the ART DIRECTOR of my pedals!)

http://www.mediafire.com/convkey/cc3e/dwruby5qa4xh54szg.jpg
http://www.mediafire.com/convkey/70fe/21787xjl0u5tkuczg.jpg

I hope you enjoy, thanks for your attention!

Peace,
Z.

[willienillie]

Sorry I can't help you with your question, but I do have a suggestion.  I used to have an FX-25, and it sounded good but distorted too easily when I hit the strings hard.  Following a recommendation I had read somewhere on this forum, I swapped the 1458 for a 4558.  The tone didn't change, but the distortion problem was gone.  Since you have a socket, it would be easy for you to try it out.

[Mark Hammer]

Sweet!

The Q-Tron+ also includes a send-return insert.  The important reason for including an insert patch-point is that, while distortions/fuzzes can provide the harmonic content that makes the filtering more obvious and interesting, simply sticking a fuzz before the filter robs the signal of the dynamics needed to provoke a decent sweep.  Implementing an insert between the detection of the input signal's envelope, and the application of the filter to that signal, allows you to take advantage of the added harmonic content, without forfeiting the dynamics.

[zemauno]

Great Mark, thank you again!!!

Pace,
Z.

[Fancy Lime]

Hi,

glad to hear it works as planned now! I just now realize that you could also add a DPDT switch to switch between the two different loop options.

Cheers,
Andy

[zemauno]

Yes Andy,

it works very well!

Unfortunally i dont have another 12a jack, so i choose the second solution.

Thank you again!

Peace,
Z.

[newjackruby]

Just finished the Mad Bean version. Love it!