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Wampler Ecstasy Debugging thread: your questions here!

Only officially FSB approved schematic for the Wampler Ecstacy
Redrawn schematic by jymaze
Only officially verified, tested and FSB approved stripboard layout by IVIark
Only officially verified and tested pcb layout by Rocklander

All other layouts, pcbs and schematics should be considered as unverified. Most of the discussion about debugging was on the basis of boards or layouts made ELSEWHERE! This was moved to the debuggin thread...

modman, 10.ii.2015
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Could this be a Marshall Bluesbreaker/KOT? Is this picture enough to go on?
I'll take it apart and photograph the other side if you need me to. Or has this
already been discussed. I searched and found nothing.

I took it apart and there's no use taking pictures, there are no traces showing.

wampler outlined it in another thread.

coldcraft wrote:wampler outlined it in another thread.

https://www.freestompboxes.org/viewtopic ... acy#p50172

"super ecstasy is a basic opamp clipper with bass boosts, from there go to a cap, diodes to ground on a switch, tone control is basically what people call the stupid wonderful tone control (IIRC - I don't remember the exact schem of mark's but it's basically the same thing). From there into a jfet gain stage and then into the volume control."

Greg_G wrote:

coldcraft wrote:wampler outlined it in another thread.

https://www.freestompboxes.org/viewtopic ... acy#p50172

"super ecstasy is a basic opamp clipper with bass boosts, from there go to a cap, diodes to ground on a switch, tone control is basically what people call the stupid wonderful tone control (IIRC - I don't remember the exact schem of mark's but it's basically the same thing). From there into a jfet gain stage and then into the volume control."

I don't see a jfet in the above picture. Interesting.

could be an older/different version. there used to be a super ecstacy at some point i think

the ecstasy and super ecstasy are two totally different circuits.
this one is soft clipping into a variable lpf into an opamp gain stage.

ugh, I have a habit of hitting submit too quickly.

Here's the thinking along the design of the ecstasy. The idea was to boost the bass to fuzz up the bottom end a bit, yet retain soft clipping. So there's a pot to a big cap (nfb to ground), variable low pass filter as a tone control, simple gain boost opamp stage after this.

switch adds in diodes to 4.5v ref (IIRC!), soft clipping only, or no diodes which is all opamp clipping. Simple design, but works and sounds great.

This came in for repair today. Needed a new IC and the owner wanted the LED to be tamed down a bit.
Great sounding pedal and great construction.

Somehow I can't edit my posts (feature deactivated not enough posts maybe?) so here is a new one. If its possible I would be happy to know.

It is way harder to reverse engineer from pictures than the actual unit. In the attachments are the parts were I am sure. Hope that helps somehow. Red lines are connections were I can't be 100% sure, but everything else wouldnt make much sense.

R1 47k
R2 47k
R3 1k
R4 47k
R5 1k
R6 47k
R7 10k
R8 100k
R9 33k
R10 100k
R11 470k
R12 470k
R13 100k
R14 1M
R15 100k
R16 3k3

Usually the gain is in series with a res(10k?)and in parallel with the diodes on op1,which is referenced to Vref with the other 470k.
also the 2 diodes after the 47k are on Vref
i guess tone goes to ground (or Vref)with a cap,then vol to output

I really wish I had the pedal for a bit longer. It was a quick fix, the guy picked it up the same day. Probably should have taken better/more pics.

ok
i should have figured it out,what about cap values missing?
,c7 is 1uF,tone cap could be 22 or 47nF,wiper to ground,then vol out.
ceramic? 100,220p?

ceramic should be 47p
voltage dividers elec 47uF
input cap to ground maybe 220p
C4 47 nF

I know a lot of folks are waiting for this one!

I just traced it yesterday from the gut-shots. The only critical component that I don't know the value of is C3. It looks like 22n or 47n from the size of the cap on the gut-shots, but it makes no sense to me.

220n makes the bass control much more effective. Maybe it should be socketed on builds.

Where I put "switch", it goes to the on-off-on switch to select the clipping fashion.

It is from LTspice schematic capture module so I separated the tone control in half for simulation purpose, but it is a 25k pot in a Stupidly Wonderful Tone Control configuration.

Have fun!

corrected schematic: viewtopic.php?f=7&p=187214#p197137

i saw another gutshot somewhere and that cap was a 47n

Then we have a potentially fully working schematic since the other caps are not too critical and are not expected to modify the response curve in any noticeable fashion.

I won't build it, but I am impatient to see it verified

Here it is again, corrected:

Hey jymaze, thanks for the schematic. Am I interpreting this correctly, is the tone control:

Lug 3 to 1K
Lug 2 to 22n to ground
Lug 1 to volume 3

and is the 100K shown at the output the volume pot or is there a resistor to ground before the pot?

Cheers