Seek wah (NO CLONE)

[ech0es]

found on musikding.de:

Image removed

Accoring to cusack music, it seems that seek pedal has more components:
http://www.cusackmusic.com/images/normal/TapTempoBoard2.jpg

http://www.cusackmusic.com/images/normal/TapTempoBoard1.jpg

Do you think that with the schematic on musikding we are able to build a seek-wah type effect LIKE zvex (not a clone) ?

I don't understand where are the input and output on the schematic, can somebody mod it ?

[mattumbi]

Looks like that schem is missing in/outs & wah circuit; this schem is just the clock & sequencer.

[ech0es]

SOrry a little mistake between the two schematics:

Image Removed

and now ?

[The Tone God]

Please do not post Zvex schematics on the forum.

Andrew

[michal_k]

does anybody know where i can buy such a tiny pots? I've been looking for something like these for few weeks.

[The Tone God]

Mouser and Digikey carries those type of pots. 9mm.

Andrew

[michal_k]

yeah, but minimum quantity is 1000 at mouser's. anybody see such pots available in smaller packages?

[The Tone God]

Most places, Mouser including last I checked, carry values like 5K, 10K, 25K, 50K, and 100K usually linear taper. Anything else is special order hence large minimums.

Edit: Looks like they carry more then I thought.

http://www.mouser.com/catalog/630/538.PDF

Andrew

[michal_k]

thanks,
~2$ is a bit pricey for a pot, isn't it?

but at least i know why zvex stomps with sequencer are much more expensive then others, 10$ for pots only...

[analogguru]

Ok, this schematic has nothing to do with "forbidden stuff", was completely independently designed by myself more than two years ago and should give you even more possibilities:

Analogguru´s Zecken-Weh

enjoy,
analogguru

@Tone God
I swear and guarantee that this has been developed without any knowledge of constructional details or inside guts of the seek wah.  I developed this after the request of some young boys (friends) at www.musikding.de.  The time needed was about 2 or 3 hours mainly for drawing the schematic.
Here is the proof:
http://forum.musikding.de/yabbse/index.php?topic=1920.0

Now I am awaiting "Seek Wah 2" with this features.

[The Tone God]

@Tone God
I swear and guarantee that this has been developed without any knowledge of constructional details or inside guts of the seek wah.  I developed this after the request of some young boys (friends) at www.musikding.de.  The time needed was about 2 or 3 hours mainly for drawing the schematic.

Cool by me.

Andrew

[calculating_infinity]

Ok, this schematic has nothing to do with "forbidden stuff", was completely independently designed by myself more than two years ago and should give you even more possibilities:

Analogguru´s Zecken-Weh

enjoy,
analogguru

@Tone God
I swear and guarantee that this has been developed without any knowledge of constructional details or inside guts of the seek wah.  I developed this after the request of some young boys (friends) at www.musikding.de.  The time needed was about 2 or 3 hours mainly for drawing the schematic.
Here is the proof:
http://forum.musikding.de/yabbse/index.php?topic=1920.0

Now I am awaiting "Seek Wah 2" with this features.

  Thanks a lot for sharing analogguru!

[The Tone God]

I will point out that Vanishing Point v2.0 pre-dates that design.

Andrew

[analogguru]

"Vanishing point 2.0" doesn´t say anything to me - any help ?

For this reason I can´t comment on this.

But I can comment, that "EH Dr. Q", "Seamoon Funk Machine" and "Coron 95" where long before this design.

The 4093 design is a standard oszillator circuit, the 4022 design is a derivate of my (8x16) MIDI-signal router design dating back to 1985, presented at Frankurt Music fair in 1987 - you want to see guts ?

analogguru

[The Tone God]

I was just ribbing you a bit about pre-dating (other thread) for fun but you bring up a good point. You developed your design without looking at mine and I came up with something similar before thus we both arrived at a similar designs independently. It does happen.

Andrew

[analogguru]

A Google search gave me 1.240.000 hits for "vanishing point".

A quick forum search led me to a vanishing point with 40194/4013 a 4022 based thread of April 2005 (after my release in 03/12/2005) and to the vanishing point 2.1:
http://img.photobucket.com/albums/v515/TheToneGod/vanpoint21/vanpoint21_schem.jpg

When I have a look, I can see a lot of differences especially:
4022/4017
Steps: 4/6/8 vs. 4/8/10
Smoothing cap (C10)/ no smoothing cap
No / Random switch -reset switch
And the vanishing point is a more complex circuit (with different possibilities).

The seek Wah uses the Bespeco Weeper /Colorsound Twin-T circuit.
uses a TL072 square/triangle oscilator like in every chorus/Phaser (I was thinking first about a 555 based oscillator).
needs additionally 2 diodes and pull down resistor for the 4/6/8 step switch.

So there may be always similarities and also differences, but never identities (like BSIAB II and Box of Rock tone-control).

analogguru

[The Tone God]

Your search-fu is weak:

Vanishing Point v2.0 announcement, October 15, 2004:

http://www.diystompboxes.com/smfforum/index.php?topic=26061.0

No biggie though.

Andrew

[analogguru]

Thanks for your advice and help to find and have a look at it.

But I can still can see a lot of differences, which normally occur - even with the same approach.

analogguru

[widdly]

Thanks for posting that.  I've been building a sequencer for a friend based on the Geofex article and it works nicely but It cannot do less than 8 steos.  The Zecken wah sequencer is nice and minimal.  Any other ideas for the clock circuit?  It seems a waste to use a whole IC for a single gate.

[analogguru]

The price is not essential.  A 4093 in this configuration will cost with the components around approx. the same as an oscillator with an 555.  There are a lot of astable circuits around with an 555.
The benefit of the 4093 design is that is is from the same family which causes the smallest problems in interfacing it.

Another possibility, which would be more temperature-stable - but also a little bit more expensive - is to use a MC 14560.

You can save a little bit of space with an 555.

analogguru